This insert raises low end torque while not sacrificing sound level.  It does drop the high end horsepower level slightly on big inch motors (on smaller engines it doesn’t affect hp) and changes the tone of the muffler a bit making it sound more like a deeper version of a Rinehart or RC muffler.

All Exhaust Systems listed on this page are designed solely for Competition Race Use Only.
Not designed or legal for use on a public highway.

Not legal for sale or use in California on any pollution controlled motor vehicle.
Not legal for sale or use on any EPA pollution controlled motor vehicle.

Weight 3 lbs
Dimensions 1 × 1 × 1 in
Engine Type