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Borla CrateMuffler Resonator Option 3in Center/Center 3.5in Round x 10in - Null Sound Center/Center-Borla-BOR400939
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Borla CrateMuffler Resonator Option 3in Center/Center 3.5in Round x 10in - Null Sound Center/Center

Borla
BOR400939
808422009393
Muffler
6 Units In Stock - Ships Next Business Day
$ 198.99 $ 177.99
$ 177.99

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

Request For Information

Have questions about Borla CrateMuffler Resonator Option 3in Center/Center 3.5in Round x 10in - Null Sound Center/Center? Fill out the form below and we'll get back to you by the next business day.
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