datsbad
12-29-2005, 09:03 AM
Guys i was wondering what you think would be the best size header primary tubes for a ZL1 motor and the GM 572 ? I was thinking at least 2" ? this is in a A-body car
Travis B
12-29-2005, 09:06 AM
we have a 555ci BBC in the shop right now it has a set of custom craft headers on it(custom made) they are 2.25.
my dad has a chevelle that has 525ci BBC on the spray going in it, it has a set of custom crafts as well they are 2.25 primary also that step to 2.5 and a 4in collector.