Borla 4.35" x 9" x 14" Atak CrateMuffler, 2.5" Offset/Center 2014-2024 Silverado & GMC Sierra 1500

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Our Price: $313.49
Frequently bought together:


  • T-304 Stainless Steel Construction
  • Built to Optimize the Sound & Power of Crate and Custom Built Motors
  • Custom Sound, Tuned for Each Engine Family
  • Dramatically Reduces and/or Eliminates Drone
  • Computer Controlled CNC Manufacturing
  • Made in the USA
  • Million Mile Warranty

BORLA®'s CrateMuffler® is the world's first muffler purpose-built to optimize the sound & power of crate and custom built motors. The mufflers are directional. The outlet can be identified by the mounting bracket welded to the endcap. The directional design provides custom sound, tuned for each engine family and will dramatically reduce, or eliminate drone on specified applications. Built from premium T-304 stainless steel to give you the absolute best in performance and durability. Precision computer-controlled CNC manufacturing ensures an accurate fit.


  • Inlet/Outlet Diameter: 2.5"/2.5"
  • Configuration: Offset/Center
  • Case Size/Shape: 4.35"H x 9"W x 14"L Oval
  • Sound: Atak


Note: This muffler was designed for Small Block Chevrolet High Output 350/383/406 V8. However, it will still fit other vehicles.

Note: Professional installation is highly recommended. Borla and/or Phastek are not responsible for damage to your vehicle.

Warranty Information (opens in new tab): Click HERE

Part Number: 400820

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Warranty Information

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