Contact Us
My Account
Cart
Wish List
Top
»
Catalog
»
Subaru
»
Impreza
»
Engine
»
Engine Heads
»
KK3670
Quick Find
Advanced Search
View All Items
Manufacturers
Please Select
AEM
Brian Crower
Carrillo
Centerforce
Clutch Masters
Cobb Tuning
Competition Clu..
Cosworth
Gates
GReddy
Hawk Performanc..
Invidia
JE Pistons
JRZ
K&N
Mishimoto
Perrin Performa..
SEIBON
Stillen
StopTech
TiAL
Categories
Acura
Alfa Romeo
AM General
Asuna
Audi
BMW
Buick
Cadillac
Chevrolet
Chrysler
Daewoo
Daihatsu
Dodge
Eagle
Ferrari
Fiat
Ford
Geo
GMC
Honda
Hummer
Hyundai
Infiniti
International
Isuzu
Jaguar
Jeep
KIA
Lamborghini
Land Rover
Lexus
Lincoln
Lotus
Mazda
Mercedes-Benz
Mercury
Merkur
MG
Mini
Mitsubishi
Nissan
Oldsmobile
Opel
Peugeot
Plymouth
Pontiac
Porsche
Renault
Saab
Saturn
Scion
Subaru
B9 Tribeca
Baja
Brat
BRZ
DL
Forester
GC8
GL-10
Impreza
Brakes
Cooling
Electronics
Engine
Bearings
Cams
Crankshaft
Engine Blocks
Engine Dress Up / Accessories
Engine Heads
Gaskets
Motor Mounts
Oil Pumps
Pistons
Pulleys
Rods
Timing Belts / Serpentine Belts
Valvetrain
Water Pump
Exhaust
Exterior
Forced Induction
Intake
Suspension
Transmission
Justy
Legacy
Legacy 2.5 GT
Loyale
Outback
RS
RX
Standard
STI
SVX
WRX
WRX-STI
XT
Suzuki
Toyota
Triumph
Volkswagen
Volvo
Yugo
Universal
Information
Conditions of Use
Shipping & Returns
Privacy Notice
Cosworth Big Valve Cylinder Heads
Subaru Impreza WRX STI 2004-2006
$4,240.00
$4,028.00
MSRP: $4,463.00
Normally: $4,240.00
NOW: $4,028.00
You Save (Off MSRP): $435.00 (10%)
Description
For over 40 years; Cosworth's been leader in innovative multi valve cylinder head design both racing high performance production cars. Cosworth Ported Valve Cylinder head range is latest advancement. Modified from OE cylinder head castings; substantial flow improvements upgraded valve train components offer superior performance your high performance engine.
Each original cylinder head design is carefully evaluated tested to establish improvements required to meet target performance level. Hours of testing flow bench validation used to determine best advanced port design yielding maximum usable power response. However; there is more to cylinder head design than just maximum flow. It is critical that port velocits maintained to ensure drivability valve train components matched to guarantee reliable performance. Once of these factors have been tested validated; final port contour is digitized. Using digitized program; we then reshape both intake exhaust ports using axis mill producing an accurate consistent port shape every time. In addition to reshaping enlarging intake exhaust ports; most Valve Cylinder heads feature a re-shaped combustion chamber to un-shroud valves increasing flow performance. After machining; each cylinder head receives a multiangle high performance valve on precision valve seat cutter. Then each cylinder head is ultrasonically; cleaned; serialized then hand assembled with select high performance valve train components; ready to install on your engine.
Key Features
All OE Castings
Enlarged Intake Exhaust ports
Large diameter stainless steel intake valves
Large diameter Inconel exhaust valves
Hi Rev; Dual valve springs
Titanium Retainers
Hardened Steel spring platforms
Reshaped combustion chamber on most applications
Flow bench proven design
Dyno tested
Machined Cosworth Logo
Precision Multi angle valve job
Pre-assembled; ready to install
Machined port bore finish
Knife edge port divider
6 of 8 in
Engine Heads
Shopping Cart
0 items
Sign in
E-mail address:
Password:
Password forgotten
Create an Account
Like us on Facebook
What's New?
AEM Serial Data Stream Gauge (30-4300)
$0.00
$203.95
Specials
AEM Universal Programmable Engine Manement System. EMS 4 (30-6905)
$0.00
$812.90
Reviews
Write a review on this product!
Manufacturer Info
-
Other products
Thursday 18 April, 2024
10025272 requests since Wednesday 07 November, 2012
All content and Images Copyright © 2024
Auto Parts Salon
Copyright © 2000 - 2024
osCmax
Powered by
osCmax v2.5.3