[HiFlow5 0]

I've had both MAC and BBK and found the BBK's to be far superior in quality. I don't like the individual flanges on the MAC headers cause they warp and you can't line up the header bolts without a pry bar. I did that and the welds broke at the collector and caused a nasty ticking. Go BBK for the same price as the MAC's! Just my 2 cents.