[sideview_180sx]

Originally Posted by WILDACEX187

by slotting the flange do u mean creating a space between the bolt holes? (sorry if it sounds stupid, sounded kinda dumb to me)

to get an idea of the slots i.e. expansion slots. hit up fullrace.com for pics on it. hypertek drop the motor already, before the manifold breaks due to unuse. haha jk. just drop it in and find out. BTW you don't need to spend big $$$ on a hot pipe. just get home depot fence piping and get a flange made. voila same product and 1/5 the price. for the coating go to jet-hot.com for longevity definately worth it. but why not just stay OE manifold, long lasting, rarely hear of failures either. even henry is still on stock manifold(last that I can recall) only irwin switched over. and tey are making above 300hp.