Im running edelbrock Performer RPM on the setup I mentioned in the other post where i left the video of my car. ... and as for the mufflers... Flowmaster Delta FORCE *2 chamber* 40's... not delta flow *3chamber* is what i have on my car. Buddy of mine has a similar built 350 with the delta flow 40's and i don't like the way his car sounds... his is also 2 1/4 inch instead of 2 1/2