Borla 400024 | Exhaust Muffler

Part Number
XR-1 Stainless Multicore Racing Mufflers; Center/Center; All Venues Requiring Highest Flow Muffler-Space Allowing; Round; 2.5 in. Inlet/Outlet; 14 in. Case Size; 6.25 in. Dia.
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XR-1 Multicore Racing Muffler; Venues Requiring Muffler; Center/Center; 2.5 in. Inlet; 2.5 in. Outlet; 14 in. x 6.25 in. Round Body; 19 in. Overall Length; T-304 Stainless Steel;

BORLA XR-1 Raceline products are the choice of todays hottest drag and oval track racers. Featuring a patented uninerrupted-flow design and multicore technology. BORLAs XR-1 mufflers actually outflow a straight piece of pipe in repeated testing. XR-1 race products are light weight and constructed of high quality austenitic stainless steel for track-tough durability. They meet the strictest noice requirements and use sound absorbing stainless steel pcking to protect against burnout. Hands down, BORLAs XR-1 Raceline offers the best balance of sound and power.


  • Race Muffler
  • Patented Multi-Core Technology
  • Million Mile Warranty


Body Height:6.250 in.
Body Length:14.000 in.
Body Width:6.250 in.
Inlet Connection Type:Pipe
Inlet Inside Diameter:2.500 in.
Inlet Outside Diameter:2.500 in.
Inlet Position:Center
Inlet Type:Single Center
Main Piping Diameter:2.500 in.
Material:304 Stainless Steel
Muffler Count:1
Outlet Outside Diameter:2.500 in.
Outlet Position:Center
Outlet Type:Single Center Outlet
Overall Length:19.000 in.
Tip Quantity:0
WARNING CA Proposition 65:Yes
WARNING CA Proposition 65 Message:WARNING: This product in the physical form it is sold does not present a hazard. However; operations including; but not limited to welding; brazing; or thermal cutting can expose you to chemicals including Chromium; Nickel; Cobalt; Arsenic; Cadmium and Lead which are known to the State Of California to cause cancer; birth defects and other reproductive harm. For more information go to

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