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Borla 400262 - Borla XR-1 Racing Mufflers

Borla 400262 - Borla XR-1 Racing Mufflers
Borla 400262 - Borla XR-1 Racing Mufflers

JEGS Part Number: 157-400262

XR-1 Wet/Dry Marine Performance Muffler
  • Type: Round
  • Inlet Diameter: 4''
  • Outlet Diameter: 5''
  • Case Size: 12''

    Borla 400262 Details

    Marine Performance Mufflers

    BORLA® dives into the high-performance marine exhaust market with the introduction of an all new pair of fully-polished race mufflers, PN400262.

    Collaborating with world-renowned Boostpower USA Marine of Newbury Park, CA, BORLA® incorporates its patented XR-1® Multicore race technology to deliver a pair of polished stainless steel muffler/exhaust tips for high performance power boats with up to 1200 BHP. Boostpower's founder, Alexi Sahagian, has done extensive testing with spectacular results, showing the maximized horsepower and flow required by large cubic inch marine engines. His test results also showed a 22-12 decibel reduction through the rpm range with an average -22db at idle, -14db at 3500rpm and -12db at 5800rpm (as tested on a Boostpower 675hp engine and 900sci engine - results may vary). Maintaining power while controlling sound. Just what's been needed.

    BORLA's new marine muffler is constructed of high-grade 300 series austenitic polished stainless steel with a heavy duty ¾" base flange tapped for 3/8" stainless steel studs along with a polished mounting inner ring. Our R&D results have shown T-316 stainless to be the most durable material for this application. In fact, we're the ONLY manufacture offering this superior material.

    The muffler tips are unique in that they each have a 5" step up outlet on a standard 4" installation for maximum flow without re-cutting your transom. The 12" long component is a breakthrough for larger displacement supercharged marine engines.

    And wait till you hear the world famous BORLA® Sound of Power!

    Borla XR-1 Racing Mufflers

    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 400262

    Inlet Size (in.)
    Outlet Size (in.)
    Body Height (in.)
    Body Width (in.)
    Inlet Type
    Single Center Inlet
    Outlet Type
    Single Center Outlet
    Stainless Steel
    Body Length (in.)
    Overall Length (in.)
    Outlet Position
    Inlet Position
    Manufacturer's Part Number:
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