TTIs Vs. Doug's

I purchased a set of Dougs for my 67
fit-up was good, gaskets good, header bolts sucked, water jack bolts leaked
had to use diffrent bolts 4 holes

6 months after I installed, coating on one tube looked thin and rusty, called them up they will recoat for free, I live 10 minutes away no big deal.
customer service was good