Xcceleration can supply high performance engines and engine parts from a short block (no heads) to a full long engine (with heads) ready for installation.

Note: All engines specs are subject to change without notice. All orders will be adjusted automatically to any new pricing.

All Engine Modifications are for Off-Road Use Only. All cams, heads and short blocks are custom built and all are considered racing parts, therefore do not carry any warranty period. In no event shall Xcceleration.com be liable for any warranty, labor or service charges whatsoever, as outlined in our Terms and Conditions section.

EJ20 Stage3 - Stage4 Cams:

New Cams, Not Regrinds

EJ20 Cams

with Spring and Titanium Retainers

Stage3 Cams for Street/Strip Specification, as a Plug and play application. Short duration for nice street manners, slight lope at idle. Excellent all purpose spec.

Stage4 Cams for Full Race Specification, with Longer duration profile, added rpm potential. Intended for fully built engine. Rough idle, RPM Range: 1500 to 8500, Tuning and ECU mods recommended.

Stage3 - EJ20 Cams - 0.406 inch lift

Stage4 - EJ20 Cams - 0.415 inch lift

includes:
cams, springs and titanium retainers

*$1,999. per set

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 4-6 weeks to deliver. All shipping is the responsibility of the customer.

STi Stage4 EJ25 Cams: .415 lift:

New Cams, Not Regrinds

STi Stage4 EJ25 Cams

Power to 8500 rpm

0.415 inch lift

includes:
cams, springs and titanium retainers

*$1,999. per set

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 4-6 weeks to deliver. All shipping is the responsibility of the customer.

Valve Spring / Titanium Retainer upgrade kit:

Valve Spring / Titanium Retainer upgrade kit

for EJ20 or EJ25.

These kits eliminate the danger of coil binding the stock springs when running a more aggressive cam than stock. The kit is necessary for anyone planning to exceed the stock redline.

Spring / titanium retainer upgrade kit for high boost applications.

*$799.

Big Valve STi

DOHC Cylinder Head Packages

Using Your Heads

*$8,999.

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer. All heads are available on an exchange basis only, requiring the customer's heads be modified and are not available for direct sale. If new heads are requested, $1500 will be added to above pricing.

Big Valve WRX DOHC Cylinder Head Packages

Using Your Heads

These Heads are Used in Our 800hp Engines

*$8,999.

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer. All heads are available on an exchange basis only and are not available for direct sale. If new heads are requested, $1500 will be added to above pricing.

EJ25 Stainless Steel Intake Valves

And Exhaust Valves

Big Valve EJ25 Stainless Steel Intake Valves

And Exhaust Valves

Intake: 22% Increased Flow (max)

Exhaust: 41% Increased Flow (max

Performance Stainless Steel Valves engineered for High RPM and High HP. Includes 4 intake and 4 exhaust stainless steel valves, with Magnesium and Bronze Guides. Each 1mm oversized.

*$1,599.

*Please be patient, takes about 4 - 6 weeks to deliver.

Custom Forged

Stock Bore and .5mm Oversize

Pistons

for 02+ WRX / 04-06+ STi /

05+ LGT EJ257

Custom Forged Pistons

Features include superb ring seal, higher vacuum, lower blow-by, greater durability and increased horsepower and torque through the powerband. Better yet, peak horsepower is retained through the life of the piston rings. This is achieved by lightweight forgings and exclusive machining techniques and processes.

Piston Kit Features:

- High strength aluminum forgings.

- 8.2 Compression Ratio.

- Super lightweight designs.

- Fully CNC machined and balanced to +/- 1 gram.

- Wrist Pins included at no extra cost.

- Accumulator groove included.

- Double pin oilers, force fed from oil ring.

- Pick lock grooves for easy lock removal.

Note: Pin retaining locks are not included, requires the use of OEM locks.

EJ20 (92.5mm) or EJ25 (99.5mm) or EJ25 (100mm)

Set of 4 *$ 999.

*Please be patient, takes about 2 - 4 weeks to deliver.

Custom Billet Steel Rods

Maximum strength at minimum weight
Narrow side beam for reduced windage
Precision machined 4340 steel alloy

Heat treated, stress relieved, certified 4340 steel 2-piece forgings for increased strength. X-rayed, sonic tested, magna-fluxed, all surfaces 100% machined with extremely tight tolerances.

*$ 1,299.

*Please be patient, takes about 2 - 4 weeks to deliver.

SUBARU Stroker Kits

BC 4340 billet steel crankshaft (83mm stroke). Not a reworked OEM EJ25 crank.

BC 4340 Econo or Pro Series steel billet rods w/ARP 220,000 psi fasteners.

CP aluminum forged pistons (any bore size, any compression ratio).

9310 nickel carbon steel alloy wrist pins.

Ductile iron plasma top rings, tapered second ring, low tension oil rings.

Typically includes aluminum buttons/rail supports (not locks).

Fully system balanced and ready to install.

NOTE: The stroker kit for the Subaru EJ25 engine utilizes a custom, 83mm monster stroke, steel billet crankshaft, not a reworked factory EJ25 crank. Depending on bore size that you decide, the kit will take you up to a 2.71L with a safe 102mm bore. As usual, each kit features custom CP forged aluminum pistons, premium alloy wrist pins, full ring pack and buttons. Big time power and torque gains. Econo rods rated to 600 horsepower, Pro Series rods rated to 800+ horsepower.

NOTE: The stroker kit for the Subaru EJ20 engine incorporates a proven 79mm stroke, steel billet crankshaft, not a factory STi or EJ25 crank. Depending on bore size that you decide, the kit will take you up to a 2.29L with a safe 96mm bore. As usual, each kit features custom CP forged aluminum pistons, premium alloy wrist pins, full ring pack and buttons. Big time power and torque gains. Econo rods rated to 600 horspower, Pro Series rods rated to 800+ horsepower.

Stock Specifications:
EJ25 99.5mm Bore x 79mm Stroke - 7.913" Block Height

Stock Specifications:
EJ20 92mm Bore x 75mm Stroke - 7.913" Block Height

Stroker Kit (Econo Rods) Subaru STI EJ257 *$ 3,299.

Stroker Kit (Econo Rods) Subaru WRX EJ205 *$ 3,299.

Stroker Kit (Pro Series Rods) Subaru STI EJ257 *$ 3,599.

Stroker Kit (Pro Series Rods) Subaru WRX EJ205 *$ 3,599.

*Please be patient, takes about 2 - 4 weeks to deliver.

Custom Head Gaskets EJ25

Custom MLS (Multi-Layer Steel) Gaskets are constructed of two nitrile coated outer embossed spring steel layers with a steel inner layer that provides support to the gasket allowing multiple thickness. Cometic gaskets withstands the shearing forces created by aluminum heads on cast iron blocks. Once the gasket takes a torque set, there is no re-torquing required. Less clamping force is required allowing for reduced bore distortion. Includes Cooper Rings for high boost applications.

These are the gaskets we use in the 700hp engines.

*$699.

set of 2 - Custom Cometic Head Gaskets EJ25

*Please be patient, takes about 2 - 3 weeks to deliver.

T-Sleeves for EJ20 (92.5mm) and EJ25 (99.5mm)

Need boost?

How about a block that can handle 50+ psi?

The T-Sleeve's unique three dimensional support design eliminates sleeve movement under extreme dynamic load. Using the T-Sleeves in your engine reduces the chance of side loading commonly experienced with non-supported conventional sleeves. Sleeve movement under extreme load conditions is the leading cause of head gasket failures.

*$ 999.

set of 4, need piston size, engine model and type of block

Notice: Because of possible manufacturing casting defects in engine blocks, there is a risk of cracking the block when sleeving, rendering the block unusable. Therefore, you acknowledge that, you the customer assume all liability and risk if this should occur.

The advantages of using T-Sleeves are such:

-Material: T-Sleeves utilizes centrifugal spun nodular ductile iron. The same material consistency that is used in NHRA funny car and top fuel drag racing engines.

-Superior design: T-Sleeves integrates the deck support into the sleeve offering unsurpassed gasket sealing surface area.

-Save cracked factory sleeves: With the T-Sleeves one can recon most previously destroyed blocks

-Superior strength: T-Sleeves have been pressure tested exceeding 220,000 psi without damaging the sleeves.

*Please be patient, takes about 4 weeks to deliver.

Head Stud Kit WRX/STI - EJ20/EJ25

Head Stud Kit WRX/STI - EJ20/EJ25 Engines

This Head Stud Kit comes complete with all the studs, nuts and washes required to fit all WRX and STi model Subarus using EJ20 engines. This kit is VERY strong (much better than standard) and is suitable for street, race and rally engines which run high boost.

*$349. for complete Head Stud Kit

*Please be patient, takes about 4 weeks to deliver.

JUN Cam Sprocket Set

Left & Right,

Intake & Exhaust

Subaru STI JDM V-VI EJ207 GC8

Looking for the strongest block?

Closed Deck Conversion

Let Xcceleration convert your semi-closed EJ20 or EJ25 block to a fully closed deck block. Through our custom process we are able to make your block a closed deck block for high boost and horse power applications.

We are able to convert your existing block or a new EJ20 or EJ25 block.

Process includes:

Conversion Process and
Hone Case halves, (with honing plate)
Dowel Engine halves

*$3,799. convert your EJ20 or EJ25 block

*$4,999. convert a new EJ20 or EJ25 block

add piston squirters and oil valves $999.

Looking to build your own super motor for big power? Use an STi crankshaft to start with, then add pistons, rods, and T-sleeves to your motor.

*$599.

79mm Stroke Billet Crankshaft Subaru WRX STI 2.5L EJ25

79mm Stroke Billet Crankshaft Subaru WRX STI 2.5L EJ25

Increased engine performance often means increased engine speed and load. Original factory crankshafts may not be able to withstand the added stress resulting in catastrophic failure. Billet crankshafts are machined from ultra strong EN40B steel and are engineered to endure the harshest conditions and have been tested to withstand over 1000HP! Features include superior lubrication, profiled counterweights and added strength.

*$4,199.

Looking to build your own super motor for big power? Use an STi block to start with, then add pistons, rods, crank and T-sleeves.

*$1,199.

Looking to build your motor for insane amounts of power? Use an STi short block to help bulletproof your high-horsepower goal! Comes with a full engine gasket kit, pistons, rods and crankshaft.

*$2,599.

EJ20 or EJ25 Performance Engine:

Semi-Closed Deck Short Block

Stage1

Semi-Closed Deck Short Block Stage1

includes:

1. Your Block - Disassembly and Cleaning (no core charge)
2. EJ 20 or EJ25 Short Block
3. Cylinder preparation
4. Milling (decking)
5. Forged Pistons and piston rings
6. Light Weight, hollow piston Pins and Clips
7. Cometic Head Gaskets
8. Parabolic I-Beam 4340 Billet con rod set
9. HD Crankshaft Bearings
10. HD Connecting Rod Bearings
11. Rod bolt stretch measurement
12. Dry assembly with plastic gauge
13. Oil galley clean and pre-lube
14. Assembly

EJ25 Engine - *$6,999.

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer.

EJ25 Performance Engine:

Semi-Closed Deck (STi) Short block

Stage2

Semi-Closed Deck (STi) Short block Stage2

includes:

1. New Block - Disassembly and Cleaning (no core charge)
2. EJ25 Short Block
3. Cylinder preparation
4. Milling (decking)
5. Forged Pistons
6. Light Weight, hollow piston Pins and Clips
7. Piston Rings
8. Parabolic I-Beam 4340 Billet con rod set w/ARP bolts
9. ARP Head Stud Kit
10. Cometic Head Gaskets
11. Heavy Duty Crankshaft Bearings
12. Heavy Duty Connecting Rod Bearings
13. Crank checked and trued
14. Crank Grind to achieve ideal tolerances, all pre-measured
15. Rotating assembly balancing (Crank/Rod/Pistons)
16. New STi Treated Crankshaft
17. Dry assembly with plastic gauge
18. Bearing tolerance measurement post-check
19. Deck height measurement to confirm exact quench clearance
20. Cylinder bore measurement
21. Oil galley clean and pre-lube
22. Assembly

EJ25 Engine - *$9999.

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer.

EJ25 Performance Engine:

Closed Deck Short Block

Strongest Block

Closed Deck Short Block

includes:

EJ25 Engine - *$17,199.

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer.

EJ25 Performance Engine:

Closed Deck

2.71 Stroker Short Block

Strongest Block

2.71 Stroker Closed Deck Short Block

includes:

EJ25 Engine - *$19,999.

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer.

EJ25 DOHC High Horsepower Engine:

Big Valve / Hot Cam Long block

Long block includes:

1. Your Block - Disassembly and Cleaning (no core charge)
2. Forged Pistons
3. Light Weight, hollow piston Pins and Clips
4. HD Piston Rings
5. Parabolic I-Beam 4340 Billet con rod set w/ARP bolts
6. Heavy Duty Crankshaft Bearings
7. Heavy Duty Connecting Rod Bearings
8. Milling (decking)
9. Crank checked and trued
10. Crank Grind to achieve ideal tolerances
11. Rotating assembly balancing (Crank/Rod/Pistons)
12. Rod bolt stretch measurement
13. Dry assembly with plastic gauge for bearing tolerance measurement post-check
14. Deck height measurement to confirm exact quench clearance
15. Cylinder bore measurement (Straightness and out-of-round checked)
16. Oil galley clean and pre-lube
17. Assembly
18. ARP Head Stud Kit
19. High Pressure Head Gaskets
20. Your Crankshaft Treated

Big Valve / Hot Cam Cylinder Head Package

1. Your Heads - Disassembly and Cleaning (no core charge)
2. Port refinishing and bowl contouring
3. Custom angle Valve Seat Machining
4. Hand Blending of the Port/Valve Seat Juncture
5. Combustion Chamber Cleaning
6. Valve resurfacing using the 'center-less' method which also measures the stem and head run-outs
7. Exhaust port balancing,
8. Milling of the cylinder head
9. Stage4 Camshafts
10. Heavy Duty Valve Springs
11. Titanium Retainers
12. New Subaru Valve Seals
13. New Subaru Cam Seals
14. Setting of the Valve Lash
15. Graduated intake port finishing
16. Exhaust Port polishing
17. Combustion Chamber modifications, measurement and matching of combustion chamber volumes, polishing, and valve un-shrouding
18. Assembly of the Cylinder Head

Big Valve / Hot Cam Long block

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer.

EJ25 DOHC High Horsepower Engine:

Big Valve /Hot Cam Semi-Closed Deck

(STi) Long block

Semi-Closed Deck (STi) Long block includes:

Big Valve / Hot Cam Cylinder Head Package

1. New Heads - Disassembly and cleaning
2. Port refinishing and bowl contouring
3. Custom angle Valve Seat Machining
4. Hand Blending of the Port/Valve Seat Juncture
5. Combustion Chamber Cleaning
6. Valve resurfacing using the 'center-less' method which also measures the stem and head run-outs
7. Exhaust port balancing,
8. Milling of the cylinder head (depth is appropriate for application and combustion chamber work)
9. Stage4 Camshafts
10. Heavy Duty Valve Springs
11. Titanium Retainers
12. New Subaru Valve Seals
13. New Subaru Cam Seals
14. Assembly of the Cylinder Head
15. Setting of the Valve Lash
16. Graduated intake port finishing
17. Exhaust Port polishing
18. Combustion Chamber modifications, measurement and matching of combustion chamber volumes, polishing, and valve un-shrouding

Big Valve / Hot Cam Semi-Closed Deck

(STi) Long block

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer.

EJ25 DOHC High Output Engine:

EJ25 Big Valve / Hot Cam

Turbo Long Block

Closed Deck Long block

For those wanting MAXIMUM TORQUE

Big Valve / Hot Cam Closed Deck

Turbo Long Block includes:

1. New Custom Conversion Closed Deck Block
2. New STi Billet Crankshaft
3. Forged Pistons
4. HD Piston Rings
5. Light Weight, hollow piston Pins (with Clips)
6. Parabolic I-Beam 4340 Billet con rod set w/ARP bolts
7. Heavy Duty Crankshaft Bearings
8. Heavy Duty Connecting Rod Bearings
9. Block Boring/Milling for sleeve installation
10. Cylinder Boring
11. Cylinder bore measurement
12. Milling (decking)
13. Crank Grind to achieve ideal tolerances
14. Rotating assembly balancing (Crank/Rod/Pistons)
15. Rod bolt stretch measurement
16. Dry assembly with plastic gauge for bearing tolerance measurement post-check
17. Deck height measurement to confirm exact quench clearance
18. Oil galley modification for improved lubrication (pre-lubed)
19. Assembly
20. ARP Head Stud Kit
21. Custom Extra High Pressure Head Gaskets

Big Valve / Hot Cam DOHC Cylinder Head Package

1. New Heads - Disassembly and cleaning
2. Port refinishing and bowl contouring
3. Intake port redesign and graduated intake port finishing
4. Custom angle Valve Seat Machining
5. Hand Blending of the Port/Valve Seat Juncture
6. Combustion Chamber modifications, measurement and matching of combustion chamber volumes, polishing, and valve un-shrouding
7. Valve resurfacing using the 'center-less' method which also measures the stem and head run-outs
8. Extensive exhaust port modifications, including port balancing and polishing
9. Milling of the cylinder head (depth is appropriate for application and combustion chamber work)
10. Stage4 Camshafts
11. Heavy Duty Valve Springs
12. Titanium Retainers
13. New Subaru Valve Seals
14. New Subaru Cam Seals
15. Assembly of the Cylinder Head
16. Setting of the Valve Lash

Big Valve / Hot Cam Turbo Long Block

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer.

2.35L DOHC High Output Engine:

Big Valve / Hot Cam Turbo Long Block

Closed Deck Long block

For those wanting to Handle High Loads

Big Valve / Hot Cam 2.35L Closed Deck

Turbo Long Block includes:

1. New Custom Conversion Closed Deck Block
2. New STi Billet Crankshaft
3. Forged Pistons
4. HD Piston Rings
5. Light Weight, hollow piston Pins (with Clips)
6. Parabolic I-Beam 4340 Billet con rod set w/ARP bolts
7. Heavy Duty Crankshaft Bearings
8. Heavy Duty Connecting Rod Bearings
9. Block Boring/Milling
10. Cylinder Boring
11. Cylinder bore measurement
12. Milling (decking)
13. Crank Grind to achieve ideal tolerances
14. Rotating assembly balancing (Crank/Rod/Pistons)
15. Rod bolt stretch measurement
16. Dry assembly with plastic gauge for bearing tolerance measurement post-check
17. Deck height measurement to confirm exact quench clearance
18. Oil galley modification for improved lubrication (pre-lubed)
19. ARP Head Stud Kit
20. Extra High Pressure Head Gaskets

Big Valve / Hot Cam DOHC Cylinder Head Package

1. New Heads - Disassembly and cleaning
2. Port refinishing and bowl contouring
3. Intake port redesign and graduated intake port finishing
4. Custom angle Valve Seat Machining
5. Hand Blending of the Port/Valve Seat Juncture
6. Combustion Chamber modifications, measurement and matching of combustion chamber volumes, polishing, and valve un-shrouding
7. Valve resurfacing using the 'center-less' method which also measures the stem and head run-outs
8. Extensive exhaust port modifications, including port balancing and polishing
9. Milling of the cylinder head (depth is appropriate for application and combustion chamber work)
10. Titanium Intake Valves
11. Stage4 Camshafts
12. Heavy Duty Valve Springs
13. Titanium Retainers
14. New Subaru Valve Seals
15. New Subaru Cam Seals
16. Assembly of the Cylinder Head
17. Setting of the Valve Lash
18. Flow bench testing
19. Inconel Exhaust Valves
20. Manganese/Bronze Valve Guides

Big Valve / Hot Cam 2.35L Turbo Long Block

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer.

EJ25 DOHC High Output Engine:

EJ25 Big Valve /Hot Cam 2.71 Stroker

Turbo Long Block

Closed Deck Long block

For those wanting Displacement

Big Valve / Hot Cam 2.71 Stroker

Closed Deck Long block

Turbo Long Block includes:

1. New Custom Conversion Closed Deck Block
2. New STi Billet Crankshaft (83mm stroke) Steel billet rods w/ARP 220,000 psi fasteners, 9310 nickel carbon steel alloy wrist pins, Custom Forged Pistons Ductile iron plasma top rings, tapered second ring, low tension oil rings
3. Forged Pistons
4. HD Piston Rings
5. Light Weight, hollow piston Pins (with Clips)
6. Parabolic I-Beam 4340 Billet con rod set w/ARP bolts
7. Heavy Duty Crankshaft Bearings
8. Heavy Duty Connecting Rod Bearings
9. Block Boring/Milling
10. Cylinder Boring
11. Cylinder bore measurement
12. Milling (decking)
13. Crank Grind to achieve ideal tolerances
14. Rotating assembly balancing (Crank/Rod/Pistons)
15. Rod bolt stretch measurement
16. Dry assembly with plastic gauge for bearing tolerance measurement post-check
17. Deck height measurement to confirm exact quench clearance
18. Oil galley modification for improved lubrication (pre-lubed)
19. ARP Head Stud Kit
20. Extra High Pressure Head Gaskets

Big Valve / Hot Cam DOHC Cylinder Head Package

1. New Heads - Disassembly and cleaning
2. Port refinishing and bowl contouring
3. Intake port redesign and graduated intake port finishing
4. Custom angle Valve Seat Machining
5. Hand Blending of the Port/Valve Seat Juncture
6. Combustion Chamber modifications, measurement and matching of combustion chamber volumes, polishing, and valve un-shrouding
7. Valve resurfacing using the 'center-less' method which also measures the stem and head run-outs
8. Extensive exhaust port modifications, including port balancing and polishing
9. Milling of the cylinder head (depth is appropriate for application and combustion chamber work)
10. Stage4 Camshafts
11. Heavy Duty Valve Springs
12. Titanium Retainers
13. New Subaru Valve Seals
14. New Subaru Cam Seals
15. Assembly of the Cylinder Head
16. Setting of the Valve Lash

Big Valve / Hot Cam Stroker Turbo Long Block

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer.

All above prices do not include shipping and duty, which will be billed directly to the customer. Call for details.