-10%
Click to zoom in
SKU: 40347 | UPC: 808422903479
Borla ProXS Muffler 2in Center Inlet/ 2in Center Outlet 4in x 9.5in Oval x 14in Long Body 40347 - Universal
The Borla 40347 ProXS Muffler delivers straight-through performance for custom exhaust systems on vehicles with 2-inch piping. This reversible oval design boosts horsepower and torque while providing the aggressive Borla Sound of Power. Add refined motorsport styling and improved fuel economy to any street or track build.
Key Features
- Reversible Design: Mount inlet and outlet in either direction for maximum installation flexibility on any 2" exhaust setup.
- T-304 Austenitic Stainless Steel: Corrosion-resistant material ensures lifelong durability without rust in harsh conditions.
- 100% Welded Construction: Full welds deliver structural integrity for high-heat, high-pressure performance environments.
- Free Flow Technology: Patented straight-through core reduces backpressure for noticeable gains in power and throttle response.
- CFF Acoustic Material: High-temperature continuous-filament fiber tunes deep, aggressive tone with minimal interior drone.
Product Notes
- Natural mill finish allows brushing or polishing before install for custom appearance.
- Overall length of 19 inches fits tight spaces in most undercarriage configurations.
- Lightweight at 7 lbs for easy handling and reduced vehicle weight.
Installation Notes
- Professional installation recommended.
- Uses standard 2-inch pipe connections; compatible with clamps or welding for secure fit.
- Reversible orientation simplifies routing around chassis components or turbo setups.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | All | All w/ 2" Piping | Custom Exhaust Builds |
Why Choose Borla?
- Pioneer in stainless steel exhaust since 1978, starting with Ferrari and Rolls-Royce systems.
- Proven increases in power, torque, fuel economy, and engine longevity across applications.
- Precision-engineered for motorsport demands with real-world throttle excitement.
Frequently Asked Questions
-
Q: Will this muffler fit my vehicle?
A: Yes, as a universal part for any vehicle or custom setup with 2-inch inlet/outlet piping; reversible for easy adaptation. -
Q: What material is the Borla 40347 made from?
A: Premium T-304 austenitic stainless steel with 100% welded build for rust-proof strength and heat resistance. -
Q: What warranty covers this muffler?
A: Borla's Million-Mile Limited Warranty protects against defects in materials and workmanship.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Protective box, 20" x 10" x 5" dimensions
- Weight: 7 lbs
Read More
Borla
Discover the Borla Exhaust Systems collection at Black Ops Auto Works, featuring premium American-made exhaust solutions engineered for superior performance, sound, and durability. With decades of innovation and multiple U.S. patents, Borla exhaust systems are trusted by enthusiasts seeking aggressive tone, optimized airflow, and vehicle-specific fitment. Borla Cat-Back & Axle-Back Exhaust Systems Upgrade your vehicle’s sound and performance with Borla cat-back exhaust systems engineered to deliver increased horsepower, improved exhaust flow, and signature Borla tone. For targeted sound enhancement and rear-section upgrades, explore Borla axle-back exhausts, designed for easy installation and refined acoustics. Borla Mufflers, Resonators & Exhaust Components Fine-tune exhaust tone and volume using Borla performance mufflers and Borla exhaust resonators, precision-tuned for optimal sound control and airflow efficiency. Supporting components like Borla mid-pipes, X-pipes, and ... View Our Borla Products...
Exhaust Systems
Find the right performance exhaust system for your car, truck, or SUV with our curated selection of stainless-steel upgrades engineered for power, sound, and reliability. Browse proven layouts like cat-back, axle-back, and turbo-back systems, dial in flow with headers & manifolds and downpipes, or tailor your tone with mufflers & resonators and polished exhaust tips. We also stock emissions-minded solutions including direct-fit catalytic converters and universal catalytic converters. Shop top brands such as Akrapovič, AWE Tuning, Borla, Invidia, GReddy, Perrin, Banks Power, and Gibson. Every option is selected for quality construction (think mandrel-bent tubing and precise welds) and bolt-on fitment, and our Year/Make/Model search makes it easy to match parts to your build—upgrade throttle response, unlock a deeper, refined exhaust note, and enhance your vehicle’s style with components that deliver performance you can feel. View Our Exhaust Systems Products...
Mufflers
Welcome to our Mufflers collection, where performance meets style. Our curated selection offers a variety of mufflers to enhance your vehicle’s sound and efficiency. Whether you’re looking for a subtle upgrade or a loud statement piece, we have the perfect options for you. Why Choose Our Mufflers? High-Quality Materials: Crafted from durable materials to ensure longevity and reliability. Performance Enhancement: Designed to improve your vehicle’s exhaust flow and overall performance. Stylish Designs: Available in various styles to suit your personal taste and vehicle aesthetics. Easy Installation: Many of our mufflers come with easy-to-follow installation instructions for a hassle-free upgrade. Featured Products Check out some of our top-selling mufflers: Performance Muffler X1: Boosts horsepower while providing a deep, aggressive sound. Eco-Friendly Muffler Series: Designed to reduce emissions without compromising on performance. Customizable Muffler Kit: Personalize you... View Our Mufflers Products...