SLP Performance D31029 - SLP Loudmouth Exhaust Challenger 5.7L Cat-back System use w/stock exhaust manifolds; 2008-2014.
Now available from SLP is the Stainless Steel Modular Cat-Back Exhaust System for the 2009-12 Challenger 5.7L HEMI R/T. 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® resonators, to our quieter Loud Mouth II® mufflers, or for that more civil muscular sound the PowerFlo® mufflers in order to suit their individual requirements (cutting of rear pipes is needed to switch from the Loud Mouth® Series to the PowerFlo® Series).
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)
Loud Mouth® Cat-Back Exhaust System for 5.7L R/T features:
Model | Type | Sound Characteristics* | Noise Level* |
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Bullet-Type
Open Resonator (or muffler delete) |
Extremely aggressive; powerful high- and
mid-range tones with moderate resonance |
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Muffling, Bullet-
Type Resonator |
Similar to original Loud Mouth, but with
a throatier tone and reduced resonance |
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Straight-Through
"Traditional" Muffler |
Deep, rich, and mellow; minimal resonance |
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* Volume and sound quality will vary based on engine and exhaust-system specifications. Loudmouth also refers to some systems without any resonators such as the 2010 Camaro Loud Mouth and the 2005 Mustang Loud Mouth Axle backs where the mufflers are removed altogether. Images below are representations in order to better understand the differences.
California Residents: Prop 65 WARNING: This product MAY contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov
California Residents: TIRE WARNING: LMPerformance will not ship Tires to California.
Legal: Some or all of these parts may not comply with Federal, State, Province, and/or Local laws, ordinances, and regulations. Buyer takes all responsibility to ensure that any modifications or upgrades that have done conform to all applicable laws and regulations for road use, especially pertaining to safety and emissions. LMPerformance is not responsible for buyer not complying with Federal, State, Province, and/or Local laws, ordinances, and regulations. This policy shall be in force for all past, current, and future purchases from LMPerformance, Inc. LMPerformance will not ship ANY non-CARB compliant products to California where California requires products to be CARB certified such as Catalytic Converters and Induction Kits.
FREE SHIPPING: Please note FREE Shipping refers to shipping within the contiguous continental US only. All other locations extra.
IMAGES: Images may be a representation and may not reflect the actual product. Examples would be SPEC stage 3 clutch kits which all use the same photo.
Search Terms: D31029 SLP Performance SLP Loudmouth Exhaust Challenger 5.7L Cat-back System use w/stock exhaust manifolds Catback Dodge Exhaust Systems Loudmouth I SLP Loudmouth Exhaust Challenger 57L Cat-back System use w stock exhaust manifolds 2008 2009 2010 2011 2012 2013 2014
SLP's warranty obligations for SLP® Parts and Accessories (individually and collectively “Part(s)”) is limited to defects in
materials and workmanship, as solely determined after SLP’s careful inspection, for that period identified in the chart
below that begins on the date of retail purchase by the original end-user purchaser ("Warranty Period"). 90 Days from the date of retail purchase by the original end-user purchaser. *Excludes SLP® Overstock Parts, NON-SLP® Parts and Accessories, SLP® Wheels; SLP Superchargers®
; SLP® Competition Parts, and SLP® Crate Engines, which the warranty coverage for the foregoing, if any, is separate from that explained here.
These are parts that other customers have purchased while purchasing the product on this page.
History and information about SLP Performance and their products.
Since 2001, LMPerformance has worked closely with SLP Performance to offer customers a wide range of performance enhancements to the American muscle car, the best known of which is its SLP Loudmouth muffler and SLP Camaro systems. With our SLP Performance parts line we have helped customers transform late-model rides into modern muscle cars like the Camaro SS and Pontiac Firehawk.
True to its name, Street Legal Performance (SLP) has a vision "to not just provide performance, but to do so with the best engineering practices and quality possible, far exceeding the industry standards." Impressively, SLP was the first company in the performance aftermarket to develop and manufacture a 50-state emission-legal performance package specifically for V8 Camaros and Firebirds. LMPerformance carries SLP's best-in-class performance upgrades in the following product categories: TVS Supercharger Packages, Blackwing Cold Air Intakes, SLP Exhaust Tips, SLP Loudmouth Mufflers, Powerflo Headers, SLP Accessories, SLP Suspension, SLP Brake Kits and SLP Wheels. The range of applications offered by the SLP line is equally as wide. Below is just a partial list: Chevy Camaro, Corvette, GM/GMC Trucks and SUVs, Pontiac Firebird, GTP, G8, GXP and GTO, Ford Mustang and F-150, Dodge Challenger, Charger, Magnum and 300. SLP loudmouth 2013 challenger, Date: 5/9/2014
By: Beepx22
Ownership: 1 day - 1 week
Great exhaust. Loud at wide open. Nice rumble at idle. Install took less than hour with access to a lift. Don''t think you''ll find a better exhaust for the money.
Current Mods:
Slp loudmouth
Reviews for SLP Performance's Other products are show below.
Current Mods:
K&N
Flowmaster
Blackbear custom tune
Current Mods:
SLP CAI, 160 deg. thermos, competition harmonic balancer,4L60E shift kit, 3400 rpm stall converter, 373 rear end gears, granatelli 85mm maf ,Diablo predator reprogram, dual exhaust.224/224/581/581 comp cam with 114lsa and dual springs.
Current Mods:
K&N intake, magnaflow muffler swap, SLP rear section (resonator delete) and BlackBear Tune
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