These Headers will only work with the following Bassani Mufflers: 1. Bassani 4" Megaphones w/ Billet End Caps and 2.5" Baffles [1861-0381] 2. Bassani 3" Slash-Cut w/ 2" Baffles [1861-0382] 3. Bassani 3" Slant-Cut w/ 1/ 2" Baffles [1801-0308] 4. Bassani 3" Fshtail w/ 2" Baffles [1801-0266] • The real performance secret to these headers is Bassani's exclusive [patent pending] True-Dual Power Curve • Direct bolt-on replacement for your stock headers • Feature proper port angle and patented matched-length rear headpipe design that produces even performance from each cylinder • Create improved low end torque, appearance and an unmistakable exhaust tone • Crafted from 16-guage steel and finished in quality show chrome