I just don't know about that. I had Dynomax hemi turbos on it after the head swap, and they were raspy too....whereas they weren't with the stock heads. I have been told to try an h-pipe to even out the exhaust pulses in the pipes. All I need to know is what size pipe to use with a 2.5" exhaust system.


1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser

1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)