SKU: 400479 | UPC: 808422004794
Borla 400479 ProXS Muffler 2.25in Offset Inlet/ 2.25in Center Outlet 4.25in x 7.88in Oval x 14in Long Body Notched Necks
The Borla 400479 ProXS Muffler delivers aggressive exhaust tone and performance gains through its free-flow design on universal applications with 2.25-inch piping. This clamp-on muffler fits custom exhaust setups across cars, trucks, and SUVs, providing increased horsepower, torque, and throttle response with the signature Borla sound. Compact oval shape installs in tight spaces for versatile motorsport builds.
Key Features
- Notched Necks: Enable simple clamp-on attachment without cutting or welding for fast installs.
- Reversible Design: Allows inlet/outlet flexibility to match any exhaust routing configuration.
- T-304 Stainless Steel: Provides rustproof durability and strength in all welded construction.
- Compact Oval Body: 4.25in height x 7.875in width x 14in length, 19in overall length fits restricted areas.
- Free-Flow with CFF: Enhances exhaust scavenging for power gains and controls sound with high-temp fiber material.
Product Notes
- Notched necks simplify universal clamp-on setup.
- Natural mill finish accepts brushing or polishing before install.
- Ships in protective cardboard box measuring 20in x 9in x 9in.
Installation Notes
- Professional installation recommended.
- Uses standard exhaust clamps on 2.25in notched pipe ends.
- Reversible orientation supports left- or right-side routing.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | All | All | 2.25in Piping Custom Exhaust |
Why Choose Borla?
- Pioneered stainless steel exhaust for classics like Ferrari and Rolls-Royce.
- Engineered for street, off-road, and racing with proven power increases.
- Delivers heart-pounding sound and torque in every throttle pull.
Frequently Asked Questions
- Q: Will this muffler fit my vehicle’s exhaust?
A: Yes, universal design with 2.25in notched necks clamps onto most aftermarket or stock 2.25in systems for custom applications. - Q: What material construction does it use?
A: T-304 austenitic stainless steel in 100% welded build resists corrosion and handles high heat. - Q: What warranty coverage applies?
A: Backed by Borla’s Million-Mile Warranty against defects in materials and workmanship.
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Secure Borla box 20in L x 9in W x 9in H
- Weight: 7.4 lbs
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