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.

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Please be patient, certain parts are made per order and require time to manufacturer. All parts will be immediately shipped as they become available. All prices do not include any core charges, shipping, taxes or installation charges. All orders are considered 'Special Order' and are paid in full at time of order via wire transfer.

EJ20, EJ25, EJ25B Dual AVCS

Street/Race Cams:

New Cams, Not Regrinds

EJ20, EJ25, EJ25B Dual AVCS Street/Race Cams

Race and radical Street/Strip. Rough idle.

Requires compatible ECU upgrade.

Specs:
RPM Range: 1500 to 8500+
Advertised Duration (Seat):  Int:   268, 272, 282° /   Exh: 268, 272, 282°
Duration @ .50":                  Int:  225, 230, 240° /   Exh: 225, 232, 240°
Gross Lift:                           Int:  .425, .425, .443" / Exh: .409, .407, .441"

*contact us

*Price does not include shipping. Please be patient, each engine is made per order and takes about 2-4 weeks to deliver.

Valve Spring / Retainer upgrade kit:

Valve Spring / Titanium Retainer kit

for EJ20 or EJ25.

Valve train kit features strengthened steel valve springs and titanium retainers, designed for use in the cam applications with increased lift and higher revs. OEM valve springs just aren't strong enough to handle cams with increased lift, this kit requires zero machine work for installation and is an affordable solution to similar setups. Kit includes 16 springs & 16 titanium retainers.

Specs:
Seat: 1.420" @ 60 lbs
Nose: 1.000" @ 161 lbs
Coil bind: 0.860"

*contact us

Big Valve STi

DOHC Cylinder Head Packages

No Core Charge

*contact us (no core charge)

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

Big Valve WRX

DOHC Cylinder Head Packages

No Core Charge

These Heads are Used in Our 800hp Engines

*contact us (no core charge)

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

FA20 and 2.5L Closed Deck Block Case Conversion

Strongest Block

Through our custom process we are able to create a closed deck block for high boost and horsepower applications. The Strongest available.

Converted EJ25 Closed Deck block case

*Please be patient, each conversion takes about 2-4 weeks. Shipping extra.

Nitrided Crankshaft

2008 - 10 STI

Looking to build your own super motor for big power?

Use an STi Nitrided Crankshaft to start with, then add pistons, rods, and Close Deck to your motor.

*contact us

Billet Crankshafts Subaru WRX STI 2.5L EJ25

75, 79 or 83mm  Billet Crankshafts

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 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. Crankshafts are made from the finest, aerospace grade 4340 steel billet material. CNC machined on state of the art, 5 axis Mazak Integrex 300-IV CNC machines to exacting tolerances (.0001"). Every crankshaft features large radius journals that add rigidity for high horsepower, high boost, high rpm applications. Gun drilled, CNC ground oil holes feature a smooth surface for extra oiling, tear dropped for added oil scoop, cross drilled for priority main feeding to the rods and micro polished to a mirror finish for optimum bearing lubricity. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights are designed for reduced windage through the crankcase creating less oil resistance for better rpm potential.

*FEATURES* * *4340 Forged Steel* - Toughness and resistance to impact * *Core hardened using nitride hardening process* - Less chance of running deformation * *Magnetic Particle Inspection* - Ability to see flaws that may cause s stress riser * *Straight oiling to journals* - Alleviates issues with rod bearing failures * *Stress relieved* - No bending or distortion in the engine. * *Exceptional journal finish* - Longer bearing life * *Wide Pin-End Widths* - Supports wrist pin to minimize failures * Reluctor wheel included (where applicable) * Concentric journal machining * Cam-cut for improved performance * Gun-drilled rod and main journals * Exceptional journal finish * Crank keyways cut to match OEM locations.

*contact us

EJ25 - 2.5L STi Engine Block

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.

*contact us

OEM EJ25 - 2.5L STi Short block

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

*contact us

EJ25 Performance Engine:

Stage1

Semi-Closed Deck Short Block

Xcceleration

Semi-Closed Deck Short Block Stage1

includes:

1. Our Block -  (no core charge)
2. Forged Pistons
3. Performance Head Gaskets
4. 1/2'' head studs with machining
5. H-Beam Tuff Rod upgrade
6. Assembly

Choice of : 8.2:1, 9:1, 10:1 compression

EJ25 Engine - *contact us

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 4-8 weeks to deliver. All shipping is the responsibility of the customer.

EJ25 Closed Deck

Short block Stage1

Xcceleration

Closed Deck Short block Stage2

includes:

1. Our Custom Conversion Closed Deck Block (no core charge)
2. Forged Pistons
3. H-Beam Tuff Rod upgrade
4. 1/2'' head studs with machining
5. Performance Head Gaskets
6. Assembly

Choice of : 8.2:1, 9:1, 10:1 compression

EJ25 Engine - *contact us

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 4-8 weeks to deliver. All shipping is the responsibility of the customer.

EJ25 Closed Deck Short Block

"Strongest" Stage2

Xcceleration

Closed Deck Short Block

includes:

EJ25 Engine - *contact us

EJ25 Big Valve / Hot Cam

Semi-Closed Deck Long block

Xcceleration

Custom Semi-Closed Deck Long block includes:

Xcceleration Big Valve / Hot Cam Cylinder Head Package

1. Our 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. Stage3 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. Head porting

Big Valve / Hot Cam Semi-Closed Deck

EJ25 Long block

EJ25 DOHC High Output Engine:

EJ25 Big Valve / Hot Cam

"Closed Deck" Long Block

For those wanting

MAXIMUM TORQUE

MAXIMUM STRENGTH

THIS IS THE LONG BLOCK

WE USE IN OUR 800HP

ENGINES

Xcceleration

Custom Big Valve / Hot Cam / Closed Deck

Long Block

Short Block includes:

Xcceleration Big Valve

Hot Cam DOHC Cylinder Head Package

1. Our 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. Stage3 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. Head porting

Big Valve / Hot Cam EJ25 Long Block

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 4-8 weeks to deliver. All shipping is the responsibility of the customer.

EZ30r Closed Deck Short Block

"Strongest"

Xcceleration

 Custom EZ30r Cylinder Head / Closed Deck

Long Block

Short Block includes:

1. Our Custom Conversion Closed Deck Block (no core charge)
2. New  Crankshaft
3. Custom treat crankshaft for hardness
4. Custom billet 'H' beam rods
5. Custom Race Rod Bearings
6. Oem stock mains
7. Custom Forged Pistons 8.5:1
8. Bore closed deck engine block
9. Assemble closed deck short block
10. Balance and rotating
11. O rings and rear seals

Choice of : 8.5:1  compression

Xcceleration

Custom EZ30r Cylinder Head Package

1. Our 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
7. Exhaust port balancing,
8. Milling of the cylinder head (depth is appropriate for application and combustion chamber work)
9. Camshafts
10. Valve Springs
11. Retainers
12. New Subaru Valve Seals
13. New Subaru Cam Seals
14. Assembly of the Cylinder Head
15. Setting of the Valve Lash
16. Head porting

Custom EZ30r Cylinder Head / Closed Deck Long Block

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 4-8 weeks to deliver. All shipping is the responsibility of the customer..

All above prices do not include shipping or duty, which will be billed directly to the customer. Call for details. All orders are considered 'Special Order' and are paid in full at time of order via wire transfer.