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Myron Piatek · 02-08-2012, 01:23 PM

I've been using TTI 1 5/8"-1 3/4" step headers for many years. After the first couple of years of tuning, I added the TTI 3" X-pipe and Dynomax Ultraflow mufflers ending at the rear housing. After removing the extra 60-70 lbs the exhaust system added from elsewhere in the car and a little more tuning, the car was between .05 and .10 faster than the best I could get with their open header and collectors.

I may try the Dynomax bullet-style mufflers at a later date to save weight and have more room around the differential. But I don't know off hand how specific the IHRA Pure Stock rules are pertaining to mufflers for your application.

02-08-2012, 01:23 PM	#21
Myron Piatek VIP Member Join Date: Nov 2001 Location: Florida Posts: 1,542 Likes: 34 Liked 138 Times in 51 Posts	Re: Pure stock 340 Mopar I've been using TTI 1 5/8"-1 3/4" step headers for many years. After the first couple of years of tuning, I added the TTI 3" X-pipe and Dynomax Ultraflow mufflers ending at the rear housing. After removing the extra 60-70 lbs the exhaust system added from elsewhere in the car and a little more tuning, the car was between .05 and .10 faster than the best I could get with their open header and collectors. I may try the Dynomax bullet-style mufflers at a later date to save weight and have more room around the differential. But I don't know off hand how specific the IHRA Pure Stock rules are pertaining to mufflers for your application.