Interestingly, every single time Brûlé is involved with a SBM dyno test and they use his dyno headers they always get the header size wrong. That is NOT a 1.750 diameter header. It never was.
Either they can’t read a tape measure or a dial caliper, or they have forgotten what size they really are, but that’s not a 1.750 diameter header.
Probably the 5th or 6th time I’ve seen that. Maybe I should send an email to Westech and tell them to grab a tape and get the size correct so the reader doesn’t get misled any more than usual by these articles.
