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Borla CrateMuffler BBC 396/402/427 ATAK 2.5 inch ID Offset/Center 14in x 4.35in x 9in Oval Muffler-Borla-BOR400852
Borla CrateMuffler BBC 396/402/427 ATAK 2.5 inch ID Offset/Center 14in x 4.35in x 9in Oval Muffler-Borla-BOR400852
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Borla CrateMuffler BBC 396/402/427 ATAK 2.5 inch ID Offset/Center 14in x 4.35in x 9in Oval Muffler

Borla
BOR400852
808422008525
Muffler
3 Units In Stock - Ships Next Business Day
$ 357.99 $ 319.99
FREE Ground Shipping!
$ 319.99

SKU: 400852   |   UPC: 808422008525

Borla 400852 CrateMuffler ATAK Big Block Chevy 396/402/427 V8 2.5in Offset Inlet/Center Outlet 14 x 4.35 x 9in Oval Muffler

Borla 400852 CrateMuffler brings ATAK aggressive sound to Chevrolet Big Block 396/402/427 CID V8 crate and custom engines with stock exhaust output. This 2.5-inch offset inlet to center outlet oval muffler installs in custom exhaust setups for classic Chevy trucks, cars, and performance builds. Gain power, torque, better fuel economy, and drone-free throttle response with every rev.

Key Features

  • ATAK Sound Technology: Directional design tuned specifically for Big Block Chevy 396/402/427 V8 engines eliminates drone while delivering deep, aggressive exhaust note recognized by enthusiasts.
  • T-304 Stainless Steel Build: Premium material resists corrosion for long-lasting performance in all conditions, outlasting standard mufflers.
  • Precise CNC Manufacturing: 14in L x 4.35in H x 9in W oval body with 2.5in inlet/outlet ensures exact fit and flow for stock output engines.
  • Power and Efficiency Gains: Increases horsepower, torque, and fuel economy while extending engine life through optimized exhaust flow.
  • Million-Mile Warranty: Borla backs this muffler with unlimited mileage coverage for complete peace of mind.

Product Notes

  • Muffler is directional; outlet end identified by welded mounting bracket on endcap for correct installation.
  • Designed for street use; not off-road only.
  • Ships in protective packaging measuring 20in x 10in x 6in.

Installation Notes

  • Professional installation recommended.
  • Verify inlet/outlet orientation before mounting; offset inlet positions toward engine side.
  • Compatible with standard 2.5in pipe connections; no special hardware required.

This Part Fits

Year Make Model Submodel
1965-1982 Chevrolet Camaro 396/402/427 V8
1964-1972 Chevrolet Chevelle 396/402/427 V8
1965-1982 Chevrolet Corvette 396/402/427 V8
1968-1974 Chevrolet Nova 396/402 V8
1960-1987 Chevrolet C/K Pickup 396/402/427 V8
1967-1981 Chevrolet Impala 396/402/427 V8
1964-1980 Chevrolet El Camino 396/402/427 V8

Why Choose Borla?

  • Leaders in stainless steel exhaust since pioneering systems for classics like Ferrari and Rolls-Royce.
  • Most experienced exhaust brand with proven wins in racing and street performance.
  • Every CrateMuffler engineered for specific engine families like Big Block Chevy for perfect sound and flow.

Frequently Asked Questions

  • Q: Which engines is this muffler designed for?
    A: Fits Chevrolet Big Block 396/402/427 CID V8 crate and custom engines with stock exhaust output in compatible vehicles.
  • Q: What material is used in construction?
    A: T-304 stainless steel throughout for maximum durability and corrosion resistance.
  • Q: What warranty coverage is provided?
    A: Million-Mile Warranty covers defects in materials and workmanship for the original owner.

Shipping & Handling

  • Method: UPS Ground or FedEx
  • Availability: In stock - ships same or next business day
  • Packaging: Secure box 20in x 10in x 6in
  • Weight: 11 lbs

Request For Information

Have questions about Borla CrateMuffler BBC 396/402/427 ATAK 2.5 inch ID Offset/Center 14in x 4.35in x 9in Oval Muffler? Fill out the form below and we'll get back to you by the next business day.
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