You purchased your muscle car for a reason. Now, Gibson gives you a powerful Exhaust System that screams performance. You can expect a deep powerful exhaust rumble tone with improved acceleration and increased horsepower gains of 25+ when you put the pedal to the metal! Gibson Muffler actually tunes your exhaust by using resonance chambers, directional louvered tuning ports and angular induction to draw exhaust gases into the muffler and expel it at a higher velocity that delivers optimum power. Hassle free, bolt-on installation with professional looking results. This performance Stainless steel exhaust is offered with a Check Engine light Fee NPP valve delete cat and provided with large 4.5" Polished Stainless Steel Quad tip exits. Backed by a Lifetime Limited Warranty and 100% Made in the USA.