At best, this is a waste of time and money. I bought these for my '68 cougar (same chassis as the '68 mustang) when I installed them and got stuck in the transmission pan because the headers are skewed different than straight back like they should be, I'll get them back and with you the company go higher quality. Now I have to wait even longer for the car to be ready, thanks Hedman, your joke company ass should have known better