My old pump gas 517 C.I. Street motor made 727 HP at 4300 Ft. in Klamath Falls Oregon on a fairly new, less than one year old, DTS engine. I posted on how that motor responded to removing the 3.0 inch stem from the car at the track, .02 ET and .2 MPH in the 1/8 mile gain with it off.
My message is I really don't think switching from a 3.0 inch system to a 3.5 inch exhaust system will make a noticeable gain on the street or at the track: work: twocents

Last edited by Cab_Burge; 11/20/22 03:04 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)