Exhaust› Exhaust Pipes, Systems and Components

SLP Performance

LoudMouth Cat-Back Exhaust System w/ 3.5-Inch Tips

$549.99

SKU: 31042A-SLP

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The SLP LoudMouth Cat-Back Exhaust System is a performance exhaust upgrade designed for select Chevrolet Camaro and Pontiac Firebird models with LS1 engines. This system features a LoudMouth resonator for minimal flow restriction and a distinct sound. Constructed from mandrel-bent stainless steel, it offers durability and a show-quality appearance with polished components and 3.5-inch slash-cut tips.
Show original supplier description
The SLP LoudMouth Cat-Back Exhaust System (Part Number 31042A-SLP) is engineered for Chevrolet Camaro and Pontiac Firebird models equipped with the LS1 engine. This cat-back system utilizes SLP's exclusive modular design, allowing for quick changes between muffler and resonator types by simply adjusting band clamps. This feature gives you control over your vehicle's exhaust tone and volume. It includes a LoudMouth resonator, which offers virtually zero flow restriction and contributes to a more aggressive exhaust note. The system is lighter than the OEM exhaust assembly and features polished components along with 3.5-inch slash-cut tips for a show-quality look. Installation is aided by pre-welded hangers, detailed instructions, and all necessary hardware. The system is compatible with SLP's LoudMouth II bullet-type race muffler (Part #31067), which can be purchased separately for further customization of sound and performance. The SLP LoudMouth Cat-Back Exhaust System is covered by SLP's Performance Guarantee and a Limited Lifetime Warranty.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandSLP Performance
Part Number31042A-SLP
CategoryExhaust
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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