RPI Designs, located 
Salem, Ohio, offers many c5/c6/ c7 corvette Stingray 


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Custom painted and carbon fiber parts are manufactured to order and take up to 4 weeks to complete, so please keep this in mind. Our motto is quality before speed. We stand behind our custom parts. Most other parts are in stock and ship within 24 hours.

Quality Parts & Accessories for C5/C6/C7 Corvette Stingray, 2010-2015 Camaro, 2016 6th Gen Camaro, 2015 Ford Mustang and Challenger Since '99

2015 Ford Mustang Parts Added Weekly.

Your Parts Authority for C5/C6/C7 Corvette Stingray & 2010 2011 2012 2013 2014 2015 Camaro, 2016 6th Generation Camaro and 2015 Ford Mustang

Challenger R/T SLP Loudmouth II Exhaust 2008-2013
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Challenger R/T SLP Loudmouth II Exhaust 2008-2013
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Challenger R/T SLP Loudmouth II Exhaust 2008-2013
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2008-2012 Dodge Challenger, 5.7L, Loud Mouth II 

Now available from SLP is the stainless steel, Catalyst-Back Modular Exhaust System for the 5.7L 2008-2012 Challenger. It is available in Loud Mouth™ Loud Mouth II™ and PowerFlo designs. Thanks to the modular design, either resonators or mufflers can be ordered individually and interchanged separately. 

These systems provide a noticeable performance gain of up to 12 horsepower and are designed using SLP's innovative modular technology. This enables customers the flexibility to change the performance and noise-level characteristics by switching from our bullet-style Loud Mouth II™ mufflers, to our louder Loud Mouth™ resonators or our more civil but muscular sounding PowerFlo system (cutting of rear pipes would be needed) in order to suit their individual requirements.

Each system is constructed from 3" stainless steel mandrel-bent tubing, for unrestricted flow with an integrated 3" 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.

Loud Mouth II™ catalyst-back exhaust system for 5.7L 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 and SLP's lifetime warranty
  • All hardware and installation instructions are included

No discounts can be taken on SLP products. The price shown in our lowest price available.

Challenger SLP Loudmouth II Exhaust system.

RPI Designs
11800 Salem Warren Road
Salem, Ohio 44460

Chevrolet, Chevy, Camaro, 427, Z06, Grand Sport, ZR1, ZL1, Stingray and Corvette are registered trademarks of General Motors Corporation. RPI Designs, LLC. has no affiliation with General Motors Corporation.

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