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Cosworth CNC Ported Big Valve Heads Zoom Cosworth

Cosworth CNC Ported Big Valve Heads

For over 40 years, Cosworth has been the leader in innovative multi valve cylinder head design. Their latest advancement is the Cosworth CNC Ported Big Valve Cylinder head range. Modified from OE cylinder head castings, substantial gas flow improvements and upgraded valve train components offer superior performance for your high performance engine.

Each original cylinder head design is carefully evaluated and tested to establish the improvements required to meet the target performance level. Hours of testing and flow bench validation are used to determine the best advanced port design yielding maximum usable power and response. However, there is more to cylinder design than just maximum flow. It is critical that port velocity is maintained to ensure drivability and valve train components are matched to guarantee reliable performance. Once all of these factors have been tested and validated, the final port contour is digitized. Using the digitized program, we then reshape both intake and exhaust ports using a 5 axis CNC mill producing and accurate and consistent port shape every time. In addition to re-shaping and enlarging the intake and exhaust ports, most Big Valve Cylinder heads feature a re-shaped combustion chamber to un-shroud the valves increasing air flow and performance. After machining, each cylinder head is ultrasonically cleaned, serialized and then hand assembled with select high performance valve train components, ready to install on you engine. Features include:

Enlarged Intake and Exhaust ports
Large diameter stainless steel intake valves
Large diameter Inconel exhaust valves
Hi Rev valve springs
Titanium Retainers
Hardened Steel spring platforms
Reshaped combustion chamber on most applications
Flow bench proven design
Dyno tested
Machined Cosworth Logo
Multi angle valve job
Pre-assembled, ready to install

All Ford Cosworth CNC Ported Big Valve Heads
View All Ford Focus Heads
Ford FocusMSRPPrice
(2003-2007) Duratec 2.0/2.3L$3,599.00$3,365.07  Add to Cart
All Infiniti Cosworth CNC Ported Big Valve Heads
View All Infiniti G35 Heads
Infiniti G35MSRPPrice
(2003-2006) VQ35DE - Includes Rev-Up$4,728.00$4,420.68  Add to Cart
All Mazda Cosworth CNC Ported Big Valve Heads
View All Mazda 3 Heads
Mazda 3MSRPPrice
(2004-2009) MZR 2.0/2.3L (Non Speed3)$3,599.00$3,365.07  Add to Cart
View All Mazda Miata Heads
Mazda MiataMSRPPrice
(2006 and up) MZR 2.0$3,599.00$3,365.07  Add to Cart
All Mitsubishi Cosworth CNC Ported Big Valve Heads
View All Mitsubishi EVO Heads
Mitsubishi EVOMSRPPrice
(2000-2005) 4G63$4,463.00$4,172.91  Add to Cart
(2006) 4G63 - MIVEC$4,539.00$4,243.97  Add to Cart
(2008 and up) 4B11T - MIVEC$4,487.00$4,195.35  Add to Cart
All Nissan Cosworth CNC Ported Big Valve Heads
View All Nissan 350Z Heads
Nissan 350ZMSRPPrice
(2003-2006) VQ35DE - Includes Rev-Up$4,728.00$4,420.68  Add to Cart
All Subaru Cosworth CNC Ported Big Valve Heads
View All Subaru STi Heads
Subaru STiMSRPPrice
(2004-2006) EJ20/25 - w/JDM/Euro Spec 278/274 Camshafts$6,068.00$5,673.58  Add to Cart
EJ25$4,463.00$4,172.91  Add to Cart
EJ25 - w/US Spec 278/274 Camshafts$6,068.00$5,673.58  Add to Cart
(2007) EJ20/25 - w/JDM/Euro Spec 278/274 Camshafts$6,068.00$5,673.58  Add to Cart
EJ25 - w/Air Injection Ports$4,463.00$4,172.91  Add to Cart
EJ25 - w/US Spec 278/274 Camshafts$6,068.00$5,673.58  Add to Cart
(2008 and up) EJ25 - w/Dual AVCS$4,463.00$4,172.91  Add to Cart
 
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Parts Available: 20000691, KK3918, 20000704, 20000704, kk3672, KK3852, 20005685, KK3918, SB8012, kk3670, sb8010, 20002026, 20001699, 20002024, 20004544