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Borla 400374 XR-1 Multicore Racing Muffler

4972591 - 400374

Borla 400374 XR-1 Multicore Racing Muffler Rotary Engine Equipped Vehicles - Center/Center - 4 in. Inlet - 4 in. Outlet - 16 in. x 6.25 in. Round Body - 21 in. Overall L - T-304 Stainless Steel

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Borla - XR-1 Multicore Racing Muffler P/N 400374 Features:

  • Race Muffler
  • Patented Multi-Core Technology

View the Full List of Automotive Applications »

Below is an abbreviated list of applications for the XR-1 Multicore Racing Muffler.


BORLA(R) PERFORMANCE INDUSTRIES is the pioneer and leader in the design and manufacture of premiumT-304 austenitic stainless steel performance exhaust. We began over four decades ago as a manufacturer of exhaust systems for such "concours classics" as Rolls-Royce and Ferrari cars and have evolved into the premier manufacturer of today's performance vehicles for the street, off-road, and racing.


  • 4972591 - 400374
  • 4972591
  • 400374
  • 808422003742
  • Borla
  • New

Shipping Information

  • Item Requires Shipping
  • 14.0 lbs.
  • W8.0000” x H8.0000” x L32.0000”
  • Free Shipping for orders over $99.00

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