Tecumseh Racing's Jerry Romanick makes adjustments to their small-block MoPar test mule, while Thrush's Peter Roberts digs through the mounds of mufflers gathered for these evaluations. Traditionally, ...

Street exhaust systems have always been somewhat ignored by performance enthusiasts. Exhaust pipes and mufflers are usually regarded as necessary evils when in search of ultimate street performance.

This Model K dragster is built by Nice motorcycles of Japan. The Harley Davidson Model K and KK were built in 1952–1953. The 750 cc side-valve engines, used the same bore and stroke of the earlier 45 ...