tti or schumacher headers ??????

I buy headers based on what my requirements are.

If I need a 1 7/8th primary with a 3.5 collector I buy a header with that.
If I need 1 5/8 with a 3 inch collector, I buy that.

brand means nothing really. You can buy a set of 150 dollar headers that meet the physical requirement and with a simple coating job make them just as good as any header you are overcharged for.

I've seen some headers for dirt cheap on summit that would be really awesome and no worse than any "status quo" header with a good ceramic coat on them from a quality standpoint. Headers have become a lot more complicated and overpriced in recent years than they ever needed to be.