We are pleased to announce the availability of Cosworth Camshafts for the Subaru Impreza GC8 version IV (prod date 9/1997) – version VI (prod date 8/2000. These cams produce a broad power band with excellent response. Ground from new cores.

Application: GC8 version IV STi (prod date 9/1997) – version VI (prod date 8/2000), 22B all, S201 all, and P1 (UK special).

Duration = 270°    Valve Lift = 10.4mm

Available now for the Mitsubishi 4B11 and 4G63.

Essential for high performance engine builds, heavy duty head studs reduce cylinder head movement in high boost or high compression engines optimizing cylinder head to block sealing. Cosworth Ultra High Performance Head Studs are manufactured from H11 tool steel with 260,000psi tensile strength and come complete with nuts and washers. Manufactured with hex broach end for ease of installation. Additionally, genuine Cosworth head studs utilize a base seating feature to evenly distribute maximum load on the stud and not the threads. This feature is typically found only in high level race engines.

Features:

• Essential for high power applications
• Superior strength compared to other brands
• High clamping force helps to seal block to cylinder head joint
• Hex broach ends ease installation
• Roll Die formed threads
• 260ksi+ (260,000psi+) tensile strength
• Special heat treat process includes heating in vacuum sealed furnace and quenched in a nitrogen chamber for precision control.

Available Now! Single valve spring upgrade for the Mitsubishi 4B11T (Evolution X). Cosworth High RPM Valve Springs are wound from the world’s finest Japanese Kobe steel and feature dual chamfered ends to reduce wear on seats and retainers. Our High performance springs have been engineered with increased seat pressure along with higher lift capability for optimum performance potential and improved valve control. Single spring design allows easy installation with no machining required and is perfect for typical high performance use. Compatible with OE spring retainers.

• Manufactured from the finest Japanese Kobe steel
• Single spring design for easy installation
• Dual chamfered ends
• Increased performance

We are pleased to announce the release of our new light weight racing stroker crankshaft for the Mitsubishi 4G63. This 94mm crankshaft is machined from heat treated EN40B steel and features an Isotropic Superfinish for superior friction reduction and lubrication properties. This revised crank is significantly lighter than previous versions and is available separately or in our 2.2L stroker kit and assembled high performance 2.2L 4G63 short block. Lighter rotating components help increase engine response and reduce the stress on other rotating components. This crankshaft is proudly manufactured at our world class facility in Northampton England. Unlike many respected companies now offering engine components that are allegedly manufactured at their facilities in Japan but actually made off shore, we control every aspect of design and manufacturing. And with over 50 years of engine design and manufacturing, Cosworth has the intimate knowledge of the interaction between engine components making our matched parts the perfect combination for maximum reliable performance.

Features

• Heat treated EN40B steel
• Full flow oiling
• Profiled counterweights
• Machined for lightness
• Superfinish process