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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
- Comes with a microfibre cleaning pouch
This is a great universal spark arrestor for 2-stroke machines
1 EXTREME was developed around Extreme riders such as Cody Webb
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
