Magnaflow Race Series Stainless Catback Exhaust System - 2015+ Hellcat Challenger WARNING: THIS IS ONE OF THE LOUDEST MUFFLERS IN PRODUCTION. IMPRESS YOUR NEIGHBORS! This all Stainless Steel Cat-Back Exhaust System comes complete with 3.5" Mandrel-Bent Tubing. This four muffler system consists of a front X-Pipe followed by two round polished Stainless Steel mufflers followed by dual rear polished Stainless Steel mufflers. PERFORMANCE. Magnaflow Mufflers feature straight-through flow designs for the ultimate in unrestricted horsepower and torque for big power while maintaining exhaust efficiency. Magnaflow exhaust systems outflow OEM chamber style mufflers by as much as 167%. This reduces engine heat and back-pressure and improves exhaust scavenging from the combustion chamber.This reduction in back pressure results in more power and torque to the rear wheels while delivering that rich powerful performance tone. SOUND. The Magnaflow Catback Exhaust System are designed and tested by Magnaflow to give your HEMI a deep, throaty but smooth tone at all RPM's. At idle and cruise speeds it will not be much louder than stock in most cases, but step on it, and it will become more aggressively toned, while not becoming overbearing and keeping the passenger compartment drone to a minimum. QUALITY. Constructed from high quality mandrel bent Stainless Steel tubing for long life and a perfect fit, this Magnaflow Catback Exhaust System features 100% polished stainless steel mufflers that are lap-joint welded for solid construction and rugged reliability even in the most extreme conditions. Mufflers are packed tight with this acoustical material unlike some others' products to ensure long life and no sound degradation over time. Add in the great looking polished stainless steel tips for great show car styling, this catback is backed by Magnaflow's Lifetime Warranty. 100% BOLT-ON. System includes complete hardware & instructions for installation. No Cutting Required! Warranty Registration Online Already purchased? Just click here and you can register for your lifetime warranty online! Specifications 2015 Dodge Challenger V8 6.2L/6.4L 3" Diameter Stainless Steel Tubing 3.5" Polished Stainless Tips Quad Split Rear Exit Competition Series Mufflers: 5" x 5" x 14" Round Tips Provided or Reuse OE Tips