Designed specifically to address the needs of tuned motors built for high horsepower applications Feature equal-length stepped headpipes; stepped three times (1 3/4"- 1 7/8"-2") and are for 125+ horsepower applications 4" straight-style performance muffler body with 2 1/2" x 16 1/2" baffle and black billet end cap with contrasting machined flutes Uses a unique extended inner collector to maximize performance Includes full-coverage heat shields, O2 sensor port plugs, and mounting hardware.