We have yet to find a better performing exhaust collector than our stinger collectors; even when tested against elaborate stainless steel collectors that cost more than twice as much. On a 355 c.u. 9:1 compression engine, independent engine builders found increases from 4 to 7 horsepower over standard collectors. In addition peak horsepower was achieved at lower r.p.m.'s. The Stinger's simple construction eliminates extra welding and pieces that are prone to crack in other collectors. They are available painted or high temperature coated.