325_driver 422 Report post Posted April 27, 2008 hey guys, going to get a new exhaust made up, with custom headers. if its done right there should be a hp increase, so any gurus on here i can talk to on here? need to calculate the measurements for extractors etc thinking about doing twin pipe straight through e.g. firing sequence is 1,5,3,6,2,4 so have extractors made up for cylinders 123, and 456 any thoughts ? i have friends in the exhaust industry, but i would prefer to get the exact measurements and other peoples opinions on it first e.g. with maximum width of pipe what sought of resonator, brand of muffler cheers any input? Quote Share this post Link to post Share on other sites
