Exhaust Primary Pipe Gasket Quantity:10 Units SM-250-350-12 SM-200-350-12 SM-200-450-14 SM-250-350-17* SM-200-350-17

SM-250-350-12 SM-200-350-12 SM-200-450-14 SM-250-350-17* SM-200-350-17 SM-225-450-14 SM-350-450-12 SM-300-450-12 SM-225-450-17 SM-350-450-17 SM-300-450-17 SM-225-450-17-2S SM-350-450-17-2S SM-300-450-17-2S SM-250-450-12 SM-350-450-6 SM-300-450-6 SM-250-450-17 SM-500-600-12 SM-300-625-17** SM-250-450-17-2S SM-500-600-17 SM-350-625-17** SM-300-625-17-2S SM-500-600-6

Will not work for stock pipes

Every Mk1 system includes an 18mm O2 bung for wideband tuning and an adapter for factory 12mm sensors—making it easy to dial in performance on stock or modified bikes

Flanged O2 bungs provide maximum support to the tubing and are recommended on 18 & 20 Gage tubing or in demanding environments

Great for turbo collectors

Exhaust Primary Pipe Gasket Quantity:10 Units SM-250-350-12 SM-200-350-12 SM-200-450-14 SM-250-350-17* SM-200-350-17Primary exhaust gaskets. Flat composite 0. 125" thick for use with Burns NhB exhaust for V Twins exhaust header system. 2 required for exhaust primaries. Will not work for stock pipes. These are NOT conical style.