SKU: 40357 | UPC: 808422403573
Borla 40357 ProXS Muffler – Universal 2.25in Offset Inlet/2.25in Center Outlet 4in x 9.5in Oval x 14in Long Body
The Borla 40357 ProXS Muffler delivers performance exhaust upgrades for custom applications on cars, trucks, and SUVs with 2.25-inch piping. This reversible oval muffler (14-inch body length, 19-inch overall) provides the Borla Sound of Power, added horsepower, torque gains, improved fuel economy, and extended engine life. Install it to experience throttle response and a motorsport-inspired tone in any setup.
Key Features
- Reversible Design: Offset inlet/center outlet configuration switches for flexible routing in tight spaces or custom layouts.
- T-304 Stainless Steel: Austenitic grade resists corrosion and heat for lasting performance in all conditions.
- 100% Welded Construction: Ensures maximum strength and durability under extreme exhaust pressures and temperatures.
- Free-Flow Design: Increases exhaust velocity for measurable boosts in power, torque, and efficiency.
- CFF Acoustic Material: High-temperature continuous-filament fiber tunes deep, aggressive sound with precise drone control.
Product Notes
- Natural mill finish allows brushing or polishing before installation for custom appearance.
- Body dimensions: 14in length x 4in height x 9.5in width; overall length 19in for versatile underbody fit.
- Universal part suits street, off-road, and racing exhaust builds; pipe connect type with 2.25in inlet/outlet diameters.
Installation Notes
- Professional installation recommended.
- Slip-fit pipe connections; weld or clamp to existing 2.25in system—no hardware included.
- Reversible orientation supports center or offset positioning based on vehicle clearance.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | All | All | Custom 2.25in Exhaust Systems |
Why Choose Borla?
- Pioneer in stainless steel exhaust for classics like Rolls-Royce and Ferrari to modern performance vehicles.
- Delivers power, torque, fuel economy, and distinctive exhaust sound worldwide.
- Engineered for street, off-road, and racing with precision manufacturing.
Frequently Asked Questions
- Q: Will this muffler fit my specific vehicle?
A: Yes, as a universal part #40357 it fits any custom exhaust with 2.25in piping; measure clearance for oval shape (4×9.5in body). - Q: What material is used and does it rust?
A: T-304 austenitic stainless steel provides rust resistance and maintains shape under high heat. - Q: What warranty coverage is included?
A: Borla backs the 40357 ProXS Muffler with a Million-Mile Limited Warranty against defects.
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Secure Borla box, approx. 20in x 10in x 6in
- Weight: 7.3 lbs
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