SLP's F-Body cat-backs have always been the best-performing exhaust systems in the business. Now they're the most versatile, too! Using our industry-exclusive modular design architecture, we've developed a line of systems that can be quickly reconfigured to fit changing performance, noise-level, and sound-quality requirements. Simply loosen a few band clamps, swap muffler types, retighten, and you're done. No other exhaust offers this level of performance and adaptability! Along with the included race muffler, the F-Body Loud Mouth system is compatible with our original Loud Mouth II bullet-type race muffler (#31067). Get both for complete control over your car's sound and performance characteristics. NOTES: Includes Loud Mouth resonator. Loud Mouth II race muffles sold separately. FEATURES: Includes our infamous Loud Mouth resonator for virtually zero flow restriction and the meanest sound around Employs SLP's exclusive modular technology, making it possible to switch between muffler and resonator types in a matter of minutes Engineered and built to OEM standards to ensure proper fit Constructed entirely from mandrel-bent stainless steel Features a show-quality polished resonator and 3.5" slash tips with electromarked SLP logo For 1998-2002 LS1 F-Bodies