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SKU: 400371 | UPC: 808422003711
Borla XR-1 Multi-Core 3in Ctr-Ctr Oval 16in x 4.25in x 7.88in Rotary Engine Equipped Racing Muffler 400371 Mazda RX-7 RX-8
Borla 400371 XR-1 Multi-Core racing muffler delivers aggressive exhaust note and power gains for rotary engine vehicles like Mazda RX-7 and RX-8. This universal reversible oval muffler with patented Multi-Core technology fits tight spaces while enhancing torque fuel economy and engine longevity. Experience Borla's signature sound of power with every throttle pull.
Key Features
- Patented Multi-Core Design: Increases flow for high-horsepower rotary applications delivering more power and torque without restriction.
- T-304 Stainless Steel Construction: All-welded body resists rust corrosion ensuring lifelong durability in racing conditions.
- Compact Oval Shape: 4.25in H x 7.88in W x 16in L body 21in overall length fits limited clearance setups on rotary-equipped cars.
- Reversible 3in Center Inlet/Outlet: Pipe connection allows flexible straight-through installation for custom exhaust builds.
- High-Temp CRF Acoustic Core: Controls sound levels while maintaining deep aggressive tone recognized by enthusiasts.
Product Notes
- Designed specifically for rotary engines but adaptable to other high-performance vehicles.
- No embossed logo for clean motorsport appearance.
- Made in USA with 1 million mile durability warranty on materials.
Installation Notes
- Professional installation recommended.
- Reversible design simplifies center-to-center piping alignment.
- Compatible with 3in mandrel-bent exhaust systems; clamps or welding required.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1979-1985 | Mazda | RX-7 | SA/FB All |
| 1986-1991 | Mazda | RX-7 | FC All |
| 1992-2002 | Mazda | RX-7 | FD All |
| 2004-2011 | Mazda | RX-8 | All |
| Universal | Rotary Equipped | Vehicles | Racing/Off-Road |
Why Choose Borla?
- Pioneer in stainless steel performance exhaust since 1978 with wins in racing worldwide.
- Builds systems for street off-road and track delivering power torque and efficiency gains.
- Engineered for precision fit flow and sound in every component.
Frequently Asked Questions
-
Q: Does this muffler fit my Mazda RX-7?
A: Yes universal design fits all RX-7 generations (1979-2002) and RX-8 (2004-2011) with 3in piping; reversible for easy adaptation. -
Q: What material is used and does it rust?
A: T-304 stainless steel with 100% welded construction prevents rust and withstands high-heat racing use. -
Q: What warranty covers this part?
A: Lifetime warranty on materials and 1 million mile on welds when installed properly.
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Securely boxed 22in x 10in x 9in
- Weight: 12 lbs
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