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Vehicle Info NeededBORLAPART NUMBER: 157-400373
XR-1 Multi-Core Racing Muffler
$29999
Ships on Oct 06, 2026
Lowest Price GuaranteeMulti-Core Racing Mufflers
XR-1 Multi-Core Racing Muffler3 in. Center Inlet/3 in. Center Outlet 6.25 in. Round 16 in. Long Body T-304 Stainless Steel Sold Individually
The XR-1 Multi-Core Racing Muffler delivers a durable, performance-tuned exhaust solution built to last.
Borla 400373 Features:
- Universal muffler. Reversible design. No logo embossement.
- Long body design works well on SUV & truck applications.
- Can be used on a wide range of vehicles.
- 3 in. Center Inlet/3 in. Center Outlet 6.25 in. Round x 16 in. Long Body 21 in. Overall Length.
- Multi-Core 4 tube internal design.
Multicore Racing Mufflers
Borla 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, Borla XR-1 Mufflers actually outflowed a straight pipe in repeated testing. 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.
Part TypeMuffler
Product LineBorla XR-1 Racing Mufflers
BrandBORLA
Package Height10.5
Package Width10.8
Package Length24.2
Weight11.59 PG
Part CategoryPerformance Parts
Outlet QuantityOne
Inlet LocationCenter
Inlet PositionCenter
Main Piping Diameter3.000 in.
Inlet TypeSingle Center Inlet
Inlet Size (In.)3
Outlet StyleStandard, without tip
Muffler FinishBrushed
Body Length16.000 in.
Muffler Count1
Inlet Outside Diameter3.000 in.
Inlet Diameter3 in (76.2 mm)
Inlet QuantityOne
Outlet Outside Diameter3.000 in.
Muffler MaterialStainless steel
Outlet Size3 in (76.2 mm)
ConstructionAll Welded
Inlet Connection TypePipe
Outlet Diameter3 in (76.2 mm)
QuantitySold individually
Overall Length21.000 in.
MaterialT-304 Stainless Steel
Case Length16 in (406.4 mm)
Internal ConstructionStraight-through baffled
Case ShapeRound
Body Width6.250 in.
Off Road Use OnlyNo
Outlet LocationCenter
Body Height6.250 in.
Outlet TypeSingle Center Outlet
Case Outside Diameter6.25 in (158.75 mm)
Part FitmentUniversal
Outlet PositionCenter
Grade TypePerformance
Vendor Part Number400373
Package Qty1
Package TypeEA
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