SCOTTYYYYY...I'm a N/A GT and not planning to top swap.
was thinking of hv3 and might eventually do plog/headersskylar44 are you planning on doing er rockers, hv3, plog? if not that downpipe is pointless and even then its only 1/4" bigger then stock
I have a ss bonneville 3" catted pipe for sale, but I'm not sure of fitment issues. South Ohio here.
Bonnie no fit W body.
99pgpgt do I need a tune for the hv3?well ill have an hv3 for sale sometime in the next year...and headers too, used, but ready to go unless you have emissions