Born from Cobb's original Subaru cylinder head program which started back in 2000, Cobb is now proud to offer thier own CNC ported cylinder head based on a long proven port design. Validated through countless hours on flow benches, both virtual and real-world, and proven on race projects including Pro Rally and Touring car. Finally, after nearly 2 years of development, refinement and testing they are proud to say thier CNC ported are superior to all cylinder heads currently available surpassing even thire own prior offerings.

The difference between Cobb's Stage 2 and Stage 3 cylinder heads are the valves used. For Stage 3 they use valves 1mm larger than stock. In addition, the exhaust valves are made in Inconel that can handle higher temperatures.

For those on a budget, Cobb also offer this cylinder package at a discounted price when you supply your own cylinder heads. Due to the necessity to work from the same heads you supply, the normal lead time is approximately 4-6 weeks. The lead time for this package when using new cylinder heads is normally 0-2 weeks. Please plan your build time accordingly.

Cylinder heads are shipped back fully assembled, blueprinted and ready for install. Cobb can set valve lash if you supply your used camshafts starting at $200 for labor. Additional costs may be necessary when setting up valve lash in the event shims/buckets need to be changed.

Stage 3 Package Includes: