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SKU: 400487 | UPC: 808422004879
Borla 400487 ProXS Muffler 3in Center Inlet/ 2.5in Dual Outlet 4in x 9.5in Oval x 19in Long Body Notched Necks
The Borla 400487 ProXS Muffler delivers aggressive exhaust tone and performance gains for custom exhaust setups on cars, trucks and SUVs. This universal oval muffler accepts a 3-inch center inlet and routes to dual 2.5-inch offset outlets with a compact 4in high by 9.5in wide by 19in long body and 24in overall length. Gain power, torque, better fuel economy and the signature Borla Sound of Power that excites on every throttle pull.
Key Features
- Notched Necks: Precision cuts allow secure clamp-on connections for straightforward installation without welding.
- Reversible Design: Mount center inlet to dual outlets or reverse for dual inlets to single outlet flexibility in custom systems.
- T-304 Stainless Steel: High-grade austenitic material resists rust and corrosion for lifelong durability in all conditions.
- Free Flow Technology: Mandrel-bent internals enhance exhaust scavenging to increase horsepower, torque and throttle response.
- CFF Acoustic Core: Continuous-filament fiber packing delivers deep, powerful sound while reducing interior drone.
Product Notes
- 100% welded construction ensures structural integrity under high heat and pressure.
- Natural mill finish accepts brushing or polishing for custom appearance.
- Made in the USA with Million-Mile warranty covering defects in materials and workmanship.
Installation Notes
- Professional installation recommended.
- Notched pipe ends compatible with standard exhaust clamps for bolt-on simplicity.
- Verify pipe sizing and routing clearance before install; reversible orientation suits most layouts.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | All | All | Custom Exhaust Systems - 3in Pipe Compatible |
Why Choose Borla?
- Decades as leader in stainless steel exhaust for street, off-road and racing vehicles.
- Proven designs deliver measurable power increases and iconic exhaust note.
- Precision engineering from concours classics to modern performance machines.
Frequently Asked Questions
-
Q: Does this muffler fit specific vehicles?
A: Designed as universal for custom systems with 3in inlet piping; check your exhaust diameter and layout for compatibility. -
Q: What material is used in construction?
A: T-304 austenitic stainless steel throughout, fully welded for maximum strength and rust resistance. -
Q: What warranty coverage applies?
A: Backed by Borla's Million-Mile warranty against defects when installed and maintained properly.
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Securely boxed, approximately 26in L x 11in W x 11in H
- Weight: 9 lbs
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