Hey Chevelle fans, I just finished installing my new Heddman headers and Flow master H pipe kit today. On My 1972 chevelle SS 402 BB,So you know I did not have to lift the motor to get the drivers side header in. They both went in from underneath no problem slid right in. No dinging the pipes at all running the dynomax ulta flows. They are a little quieter than the flowmaster 2 chamber 40"s. The car feels like it picked up 50 HP if anyone has any questions on install will be glad to answer. Could not help but tell TC.
Gary.

I've got a set of Dynomax Ulta Flows I'm gonna put in to replace my Flowamster 2 chambers, too. You happy with the change? I'm sick of the interior noise the Flows seems to cause. I don't mind loud but I want it louder outside the car than in. smile.gif

Tim.

Tron ya they sound great a little quieter inside but outside still rumbles nice and at full throttle they sound awsome. I replaced mine because of the interior resonance noise to much. Go for it you will not be diasappointed!
Gary