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SKU: 400939 | UPC: 808422009393
Borla 400939 CrateMuffler Resonator Option 3in Center/Center 4in Round x 10in
The Borla 400939 is a universal CrateMuffler resonator designed for 3-inch exhaust systems on performance vehicles. This straight-through unit installs inline to lower sound pressure levels by 2-3 dB(A) without restricting flow or power. Reversible design fits center-inlet/center-outlet setups in tight spaces, ideal for CrateMuffler systems or any 3" piping.
Key Features
- Reversible Installation: Mounts from either direction for maximum flexibility in any 3" exhaust layout.
- T-304 Stainless Steel: Corrosion-resistant material ensures lifelong durability in harsh conditions.
- 100% Welded Construction: Full welds provide structural integrity for reliable long-term performance.
- Free-Flow Straight-Through Design: Preserves horsepower, torque and throttle response with zero backpressure.
- CFF Acoustic Core: High-temperature fiber controls resonance and drone for refined exhaust note.
Product Notes
- 14-inch overall length with 10-inch body suits compact applications.
- No embossed logo allows custom finish options like brushing or polishing.
- Made in the USA with Million-Mile warranty coverage.
Installation Notes
- Professional installation recommended.
- Uses standard 3-inch pipe connections; clamp or weld compatible.
- Reversible ends simplify routing in universal or custom exhaust setups.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | Universal | 3" Exhaust Systems | CrateMuffler & Custom |
Why Choose Borla?
- Leaders in stainless steel exhaust since 1978 for street, off-road and racing.
- Proven power gains, torque increases and fuel efficiency in every system.
- Precision-engineered for perfect fit and Borla Sound of Power.
Frequently Asked Questions
-
Q: Will this resonator fit my 3" exhaust?
A: Yes, universal design with 3" center inlet/center outlet works on any 3" system including CrateMuffler mufflers, LS swaps or custom builds. -
Q: What material is used?
A: High-grade T-304 austenitic stainless steel for rust resistance and strength; natural mill finish ready for polish. -
Q: What warranty applies?
A: Backed by Borla's Million-Mile warranty against defects when installed properly.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Protective box, 16 x 8 x 8 inches
- Weight: 6.1 lbs
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