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SKU: 400287 | UPC: 808422002875
Borla 400287 ProXS Muffler - 2.25in Dual Inlet / 2.25in Dual Outlet 4in x 9.5in Oval x 19in Long Body
The Borla 400287 ProXS Muffler delivers aggressive exhaust tone and performance gains for custom exhaust builds on cars, trucks, and SUVs. This universal XL oval design with 2.25-inch dual inlets and outlets features an internal X-pipe for better flow, power, torque, and fuel efficiency. Reversible construction ensures easy adaptation to any setup, backed by T-304 stainless steel durability.
Key Features
- Internal X-Pipe: Balances exhaust pulses for smoother flow, sharper sound, and measurable horsepower/torque increases.
- Dual 2.25in Inlet/Outlet: Matches 2.25-inch piping for unrestricted scavenging and high-RPM power in performance applications.
- Reversible Design: Allows inlet/outlet flipping for left- or right-side installs and custom routing flexibility.
- T-304 Stainless Steel: Corrosion-resistant material with 100% welded seams for lifelong strength under extreme heat and pressure.
- High-Temp CFF Acoustic Core: Controls drone while amplifying Borla's signature deep rumble and race-inspired pitch.
Product Notes
- Body dimensions: 19in long x 9.5in wide x 4in high; overall length 24in for compact fit in tight spaces.
- Natural mill finish accepts brushing or polishing for custom appearance.
- Ships ready for immediate use; 11.1 lbs product weight.
Installation Notes
- Professional installation recommended.
- Uses slip-fit pipe connections; clamp or weld to existing 2.25in system.
- Reversible orientation simplifies alignment with OEM or aftermarket hangers.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | All | Custom Exhaust | Performance Builds |
Why Choose Borla?
- Leaders in stainless steel exhaust since pioneering systems for Ferrari and Rolls-Royce.
- Made in USA with Million-Mile warranty for unbeatable reliability.
- ProXS series engineered for racing wins and street performance demands.
Frequently Asked Questions
-
Q: Does this muffler fit specific vehicles?
A: Designed as universal for custom 2.25in exhaust systems on cars, trucks, SUVs, and race cars; adaptable to most performance setups. -
Q: What material and finish does it have?
A: T-304 stainless steel throughout with mill finish; polish or brush as desired before install. -
Q: What warranty coverage applies?
A: Borla Million-Mile warranty protects against defects in materials and workmanship for the original owner.
Shipping & Handling
- Method: Ground shipping via UPS or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Protective cardboard box, approx. 26in x 11in x 7in
- Weight: 11.1 lbs
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