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SKU: 40359 | UPC: 808422403597
Borla 40359 ProXS Muffler - Universal 4in x 9.5in x 14in Oval, 3in Center/Offset Reversible Inlet/Outlet
The Borla 40359 ProXS Muffler delivers performance exhaust upgrades for custom applications on cars, trucks, and SUVs. Its 4in high x 9.5in wide x 14in long oval body with 19in overall length and reversible 3in center inlet/offset outlet fits 3in piping setups easily. Expect power and torque increases, better fuel economy, extended engine life, and the signature Borla exhaust note with every throttle press.
Key Features
- Reversible Design: Switch between 3in center inlet/offset outlet or offset inlet/center outlet for custom exhaust routing flexibility.
- T-304 Austenitic Stainless Steel: Resists rust completely for long-lasting durability in all conditions.
- 100% Welded Construction: Ensures structural integrity under high heat and pressure.
- Free Flow Design: Reduces backpressure for measurable gains in horsepower and torque.
- CFF Acoustic Material: High-temperature continuous-filament fiber tunes sound for aggressive yet controlled tone.
Product Notes
- Natural mill finish allows brushing or polishing before install for custom looks.
- High-flow mandrel-bent internals support motorsport-level performance.
- Securely packaged; weighs 12 lbs with shipping box dimensions of 21in x 11in x 7in.
Installation Notes
- Professional installation recommended.
- Reversible ends simplify pipe alignment in tight spaces.
- Direct bolt-on with standard 3in clamps; no special hardware needed.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | All | Custom Exhaust Builds | Cars, Trucks, SUVs - 3in Piping |
Why Choose Borla?
- Leaders in stainless steel exhaust since 1979, starting with classics like Ferrari and Rolls-Royce.
- Engineered for street, off-road, and racing with proven power and sound gains.
- Every system built to deliver throttle response and exhaust thrill.
Frequently Asked Questions
-
Q: Does this muffler fit specific vehicles?
A: Designed as universal for custom 3in exhaust systems on most cars, trucks, and SUVs; measure your setup for inlet/outlet match. -
Q: What material is used and does it rust?
A: Full T-304 stainless steel construction prevents rust; mill finish can be polished for shine. -
Q: What is the warranty and install process?
A: Lifetime warranty against defects; pro install advised, takes 1-2 hours with basic tools for reversible setup.
Shipping & Handling
- Method: Ground shipping via UPS/FedEx
- Availability: In stock - ships same or next business day
- Packaging: Protective cardboard box, 21in L x 11in W x 7in H
- Weight: 12 lbs
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