A small gap with big importance in the performance and health of an engine - here's everything you need to know.

Bill Hedekin's 1967 Corvette should have been a runner. Once a late-1960s-style SCCA B/Production road racer, the car was returned to street duty, still equipped with a vintage 355ci Mouse with fuelie ...

Major and minor valve seat diameters are most easily checked for consistency with a pair of dividers during seat grinding operation. This assures proper seat width. The answer to the question posed by ...

We Get Our Hands On One Of The First C&L Performance Three-Valve Intake Manifolds--It Added 27 RWHP. During the summer of 2008, C&L Performance made a surprise announcement--it was nearing completion ...

Ferrari was so proud of its five-valve cylinder heads, it changed a naming convention that ran back over 25 years. For its previous mid-engine two-seaters, the three-digit name was derived from ...