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Borla 40947 - Borla XR-1 Racing Mufflers

Borla 40947 - Borla XR-1 Racing Mufflers

JEGS Part Number: 157-40947

XR-1 Sportsman Racing Muffler
  • Type: Oval
  • Inlet Diameter: 4''
  • Outlet Diameter: 4''
  • Case Size: 12'' x 4-1/2'' x 7.88''

    Borla 40947 - Borla XR-1 Racing Mufflers Details

    Sportsman Racing Mufflers

  • Race Muffler
  • Million Mile Warranty

  • XR-1 Racing Mufflers are the choice of today's hottest drag and oval track racers. With a patented straight-through design and multicore technology, XR-1 Mufflers actually outflowed a straight pipe in repeated testing. XR-1 Race Products are made in the USA of quality austenitic stainless steel for track-tough durability. They use sound-absorbing stainless steel packing to prevent burnout and meet the strictest noise requirements. Hands down, Borla's XR-1 Series offers the best balance of sound and power.

  • Multicore technology
  • Straight-through design for maximum flow
  • Austenitic stainless steel for reduced weight
  • Welded 1-piece construction for improved integrity
  • Sound-absorbing stainless steel guards against burnout

  • Borla 157-40947

    Body Length (in.)
    Overall Length (in.)
    Inlet Size (in.)
    Outlet Size (in.)
    Body Width (in.)
    Inlet Type
    Single Center Inlet
    Outlet Type
    Single Center Outlet
    Stainless Steel
    Outlet Position
    Inlet Position
    Body Height (in.)
    Manufacturer's Part Number:
    Rated 5 out of 5 by from Excellent !!! It works and sound perfect on my rx7 i will recommended it great performance highly quality product every body knows wen i'm coming in my car with this 4" borla...
    Date published: 2015-11-14
    Rated 5 out of 5 by from superb quality and sound! I'm running this muffler on my 1100hp 2jz and it sound great and actually improved performance through exhaust scavenging
    Date published: 2014-11-01
    • 2015-11-26T09:14CST
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