Borla Muffler Question

[HRBS]

why do you "HAVE" to change yours ?
are you unhappy with quality, sound, etc ?

We use ONLY Borla XR1 on ALL our builds. Superior quality, performance, sound and durability. The only variation on our cars is pipe size. We prefer the 16" long ovals over the shorter versions due to additional baffling. We've used them on show cars to all out race cars and everything in between.