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Vehicle Info NeededBORLAPART NUMBER: 157-40741
XR-1 Multi-Core Racing Muffler Type: Round
$40999
Ships on 09/04/2026
Lowest Price GuaranteeMulti-Core Racing Mufflers
- XR-1 Multi-Core Racing Muffler
- Type: Round
- Inlet Diameter: 4''
- Outlet Diameter: 4''
- Case Size: 16'' x 6-1/4''
- Race Muffler
- Patented Multi-Core Technology
- Million Mile Warranty
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 Height6.9
Package Width10.4
Package Length24.2
Weight11.99 PG
Part CategoryPerformance Parts
Outlet QuantityOne
Inlet LocationCenter
Inlet PositionCenter
Main Piping Diameter4.000 in.
Inlet TypeSingle Center Inlet
Inlet Size (In.)4
Outlet StyleStandard, without tip
Muffler FinishPolished
Body Length16.000 in.
Muffler Count1
Inlet Diameter4 in (101.6 mm)
Inlet QuantityOne
Outlet Outside Diameter4.000 in.
Muffler MaterialStainless steel
Outlet Size4 in (101.6 mm)
ConstructionAll Welded
Inlet Connection TypePipe
Outlet Diameter4 in (101.6 mm)
QuantitySold individually
Overall Length21.000 in.
MaterialT-304 Stainless Steel
Case Length16 in (406.4 mm)
Internal ConstructionChambered
Case ShapeRound
Body Width6.250 in.
Outlet LocationCenter
Body Height6.250 in.
Outlet TypeSingle Center Outlet
Case Outside Diameter6.25 in (158.75 mm)
Part FitmentUniversal
Outlet PositionCenter
Vendor Part Number40741
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
