5 mph increase with exhaust & lid
My previous best on my 99 M6 was 8.58 @83.67mph. Car had a catback only.
My best so far with the headers, duals, and lid is 8.24@88.15mph.
Im thinking around 40 or 50hp increase to pick up 5mph. Not bad for a $750 investment in my opinion.
This is of course 1/8 mile. I would assume that I would have gained 8-10 mph in the 1/4 over the stock with catback trim but I never got a chance to run it in the 1/4.
I used a universla x pipe kit along with some dynomax bullets to make my own custom exhaust. It turned out good.
All of the pics can be found HERE
Headers are coated and they are awesome.
Could've made some high 12sec passes if i had hooked a lil better but i was just beginning to learn to drive on the drag strip then, back in 2001. Anyway cheers on the great results!!!!





