Months of dyno testing have paid off heavily with our state of the art M8 headpipe. Made from 304 Stainless Steel, our long primary tubes offer performance gains the competition simply can't compete with. A true merged collector and full round crossover deliver a beautiful balanced exhaust note. Something you will never achieve with a stock smashed crossover. Equipped with both 12 and 18 mm 02 ports ensuring compatibility with both narrow and wide band 02 sensors. Accepts factory heat shields perfectly for a clean OEM look.