SLP Performance - 08-10 Challenger SRT-8 6.1L/5.7L Hemi "PowerFlo" use w/#D30004, #D30009 SLP Headers SLP's all-new Stainless Steel PowerFlo™ Cat-Back Exhaust System for the 2008-10 Challenger 6.1L SRT-8 and 5.7L 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 PowerFlo-X™ crossover pipe with full 3" down-pipes, which bolt to SLP Long-Tube headers. Re-use your factory Challenger Square Exhaust Tips. All hardware and installation instructions are included, backed by SLP's Lifetime Warranty. NOTE: Designed to work with SLP Long Tube Headers Part #D30009 (6.1L SRT-8) and Part #D30004 (5.7L R/T) PowerFlo™ cat-back exhaust system for 6.1L SRT-8 / 5.7L R/T features: Stainless Steel 3" Mandrel-Bent Tubing Polished Loud Mouth II™ Resonators and PowerFlo™ Mufflers w/SLP's logo embossed in the body Integrated PowerFlo-X™ Crossover Pipe w/3" 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