1.866-448.4843 OR 1.480.966.3040
0 Items | $0.00 | Checkout | My Account
Vivid Racing Home Page
Click Here to Search
CLEARANCE DEALSAir IntakesBig Brake KitsBrake PartsBody | Aero KitsECU TuningElectronicsEngine InternalsEngine UpgradesBeltsCylinder HeadsEngine StylingGaskets & SealsIgnitionMiscellaneousMotorsMounts/BushingsNitrousOil PartsThrottle BodyTiming KitsWater/Alcohol InjectionExhaust PartsExteriorFuel ComponentsGaugesInteriorPower PackagesPulleysRacing GearRadiator PartsRoll Bars | CagesSuspensionTransmissionTurbo | SuperchargerWheels and TiresUniversal & RepairVivid Racing GearProduct Request Form
Manufactures
Finance Your Parts Service & Tuning Our Guarantees Price Matching International Orders Extended Warranty Military Discounts Product Reviews Customer Gallery Affiliate Sales Shipping & Returns Terms & Conditions The Vivid Story
Click to Ask a Pro!
Ask a Pro with our
Vivid Racing Support System
Reviews
Tareq says: the titanium tips are nice to look at. price range is excellent. the exhaust note is very nice, but a bit too loud. ..
4 of 5 Stars!

Dave says: Nice product works great alot more opened air flow ..
5 of 5 Stars!

jose tanseco says: I am a believer of Ohlins suspension. As far as I am concerned, Ohlins makes the best suspension for automobiles and motorcycles. If you want to change your suspension to coilovers and do not want to ..
5 of 5 Stars!

Jiwung Yun says: I have purchased agency power shorty antenna in black. so far my radio reception is as good as when I had my OEM antenna and looks so much cleaner with this antenna. Tha-nks you ..
5 of 5 Stars!

Roman says: The exhaust is awesome, arrived just before New Year, so it was good present. The sound is just what it should be, with closed valve for comfortable driving and with open for burning! ..
5 of 5 Stars!


Cosworth Big Valve Cylinder Head Subaru WRX STI 2.5L EJ25 04-12
  • Cosworth Big Valve Cylinder Head Subaru WRX STI 2.5L EJ25 04-12
  • Cosworth Big Valve Cylinder Head Subaru WRX STI 2.5L EJ25 04-12
  • Cosworth Big Valve Cylinder Head Subaru WRX STI 2.5L EJ25 04-12
Upload a Photo Click to Zoom
  Product Information
Price: $4,463.00   Sale: $4,172.91
  Model: KK3670
  Reviews:   
Quantity:
Product Information
Add to Wishlist
Cosworth Big Valve Cylinder Head Subaru WRX STI 2.5L EJ25 04+

Cosworth CNC ported cylinder heads feature dyno tested and flow bench proven ports, engineered for maximum usable power. Each new cylinder head is ported on a 5 axis machine to ensure consistency and perfect port shape every time. Additionally, larger intake (+1mm) and exhaust valves (+1mm) are utilized to help increase flow. Cosworth CNC ported Big Valve cylinder heads come complete with a performance valve job, hi rev (max 10,500rpm) valve springs with titanium retainers and are ready to install. Perfect for high performance applications.

Specifications:
* CNC Ported/Machined finish port
* New Castings
* Hand blended finish work
* Intake 14.63% (average) 22% (max) increased flow
* Exhaust 30.56%(average) 41% (max) increased flow
* 4-angle Inlet Valve job
* 3-angle & radius Exhaust Valve job
* Valves are lapped
* Back-Cut Inlet Valves
* Heads are Ultra Sonic cleaned prior to assembly
* Heads are Serialized and sport a machined Cosworth logo
* +1mm Stainless Steel Intake Valves (1800 degrees max.)
* +1mm Inconel Exhaust Valves (2400 degrees max.)
* Performance Valve Springs
* Titanium Retainers
* Hardened Steel Spring Platforms
* Knife edged ports

Fits: WRX 06+ and STI 04+
Select Available Options Then Click
About Manufacturer: Cosworth
Over the last 50 years Cosworth have developed an in-depth knowledge of engines, electronics and a range of high performance technologies. This has been used to supply some of the most successful motor sport teams and vehicle manufacturers in history.

Our unprecedented success has fueled customer demand globally from diverse market sectors designing and developing technologies and components for aerospace, automotive, defense and sport applications.


View one of these Hot Items!
TTC Performance Ultimate 5.4L Stroker Kit Toyota/Lexus 2UZFE
TTC Performance Ultimate 5.4L Stroker Kit Toyota/Lexus 2UZFE
Brian Crower Stroker Kit - Honda/Acura K20
Brian Crower Stroker Kit - Honda/Acura K20
Tomei 2.2L Complete Short Block Mitsubishi EVO IX 4G63 06-08
Tomei 2.2L Complete Short Block Mitsubishi EVO IX 4G63 06-08
Tomei Advanced Spec Long Block Nissan Skyline GT-R R33 95-98
Tomei Advanced Spec Long Block Nissan Skyline GT-R R33 95-98
Tomei 2.2L 87mm Engine Kit w/Bearings Nissan 240SX SR20DET 89-02
Tomei 2.2L 87mm Engine Kit w/Bearings Nissan 240SX SR20DET 89-02
Toda Racing  Stroker Kit - 81.00mm (1797cc Displacement) Honda B16A 89-00
Toda Racing Stroker Kit - 81.00mm (1797cc Displacement) Honda B16A 89-00
Toda High Comp Forged Piston Kit - 87.50mm Honda F20C 99-09
Toda High Comp Forged Piston Kit - 87.50mm Honda F20C 99-09
Toda Stroker Kit  87.00mm x 90.7mm (2157cc) Honda F20C 99-09
Toda Stroker Kit 87.00mm x 90.7mm (2157cc) Honda F20C 99-09
Toda Stroker Kit  87.50mm x 90.7mm (2182cc) Honda F20C 99-09
Toda Stroker Kit 87.50mm x 90.7mm (2182cc) Honda F20C 99-09
Toda Stroker Kit - 87.50mm x 90.7mm (2182cc) + I-Beam Forged Connecting Rods (8.90 : 1 Comp Ratio) Honda F20C 99-09
Toda Stroker Kit - 87.50mm x 90.7mm (2182cc) + I-Beam Forged Connecting Rods (8.90 : 1 Comp Ratio) Honda F20C 99-09


International Sites
Spain
Mexico
Brazil
France
Canada
Taiwan
China
International Sites
United Kingdom
Japan
Australia
New Zealand
Russia
Germany
Italy
Vivid Racing Mini Sites
Arai GP Helmets
Body Aero Kits
Clutch Upgrades
BMW Parts
Brake Upgrades
HRE Wheels
Brembo Brakes

Vivid Racing Mini Sites
Eisenmann Exhausts
Ferrari Parts
Kreissieg Exhaust
Mercedes Parts
Mini Cooper Mods
StopTech Brakes
Status Racing
Vivid Racing Mini Sites
Porsche 911 Parts
Mitsubishi EVO Parts
Nissan GTR Parts
Volk Racing Wheels
Porsche ECU Tuning
Seibon Carbon Parts
HKS USA Parts

Agency Power
M3 Parts
Tein Coilovers
Audi A4 Parts
HorsepowerFreaks
HPF Store
ECU Tuning

Power Slot Rotors
Brembo Sport Rotors
Steel Braided Brake Lines
Hawk Pads
Pagid Brake Pads
Alcon Big Brakes
Drilled Rotors
StopTech Brakes
Ferodo Pads
Wilwood Brake Upgrade
Brembo Brake Kit
KSport 6 Piston
Slotted Rotors

Capristo Exhaust
Porsche 997 Exhaust
Agency Exhaust
HKS Exhaust
Greddy Catback
Borla Exhaust
BMW M3 Exhaust
Eisenmann Exhaust
Porsche 996 Exhaust
FRS Header
BMW M5 Header
Remus Exhaust
Fabspeed Muffler
BMW M5 Exhaust

Capristo
Akrapovic
Cargraphic
Nissan 350Z Exhaust
GruppeM
Nissan 370Z Exhaust
Subaru WRX STI Exhaust
Ferrari 360 Exhaust
Mansory
Oakley Design
Password JDM
VF Engineering
Wald Body Kits
BMW M6 Exhaust

Walbro Fuel Pump
Performance Box
Kelford Cams
Koni Shocks
Cosworth Pistons
Fabspeed Tips
Clutch Masters Stage 3
H&R Springs
TechArt Style
Grillcraft MX Series
aFe Stage 2
Porsche ECU Flash
Bilstein PSS10
AMS Turbo Kit

HRE Monoblok
HRE S1 Wheels
ADV1 Wheels
Volk TE37sl
Volk Racing
Work Brombacher
Weds Kranze
Enkei Racing
Advan Wheels
HRE Vintage
BBS Wheels
D2 Forged
Niche Wheels

Racing Suspension Parts
Performance Coilovers
Suspension Bushings
Performance Air
   Suspension

Suspension Lift Kits
Suspension Sway Bars
Performance Strut Bars
Suspension Shocks
Performance Suspension
   Springs

Suspension Mounts
Air Intake
Performance Intake
BMW 3 Series Exhaust

Current Parse Time: 2.272 s with 226 queries