Factory4.1 SL (slip-on) 044211 Size:OS Closed Course Big Bore System

Closed Course Big Bore System or as a Spark Arrestor Version

we looked at our top of the line products to deliver race-inspired performance at an economical price

1 EXTREME was developed around Extreme riders such as Cody Webb

- Matte Crystal Smoke Color  has a polarised lens

this aggressive pipe dishes out handfuls of torque and bottom to mid range pull needed for late model 200cc through 500cc machines and the rigors of the off road domain

Factory4.1 SL (slip-on) 044211 Size:OS Closed Course Big Bore SystemFactory 4 SL Titanium (Ti) Midpipe Stainless Steel (S S) Midpipe The next evolution of our very successful Factory4. Designed to be a compact perfect fitting slip on, centralizing and lowering the mass of the machine. As with its predecessor, expect an increase in power throughout the rev range and a big boost in the upper RPM. Space Age internal packing for maximum packing life. Compact design for a shorter overall length. Exclusive Oval to Round