SLP Performance - 08-09 Challenger 5.7L Hemi "PowerFlo" Cat-Back exhaust system use w/stock exhaust manifolds SLP's all-new stainless steel, Catalyst-Back PowerFlo™ Exhaust System for 2009-10 Challenger 5.7L HEMI R/T is now available. This system provides up to a 10 horsepower gain with a deep muscle car rumble and no interior cabin resonance. This system is SLP's system of choice when running SLP's Long-Tube headers and high-flow cats for that civil but muscular sound. Each system is constructed from 3" stainless steel mandrel-bent tubing, for unrestricted flow with an integrated 3.0" PowerFlo-X™ crossover pipe that will bolt to the factory 2.5" down pipes. Re-Use your factory Challenger Square Exhaust Tips. Easy bolt-on installation and all hardware and installation instructions are included, backed by SLP's Lifetime Warranty. NOTE: Designed to work with STOCK exhaust manifolds. If upgrading to our Long Tube Headers use part #D30005 (Headers). PowerFlo™ cat-back exhaust system for 5.7L R/T features: Stainless Steel 3" Mandrel-Bent Tubing Polished Loud Mouth II™ Mufflers w/SLP's logo embossed in the body Integrated PowerFlo-X™ Crossover Pipe w/2.5" Inlet Factory Style Ball-Band Clamps included to re-use Factory Challenger Tips Easy, bolt-on installation (no welding required) All Hardware and Installation Instructions are included Covered by SLP's Performance Guarantee and Lifetime Warranty