Originally Posted by SS_Firehawk

Motordyne does have their own headers and they look good. Dyno show they make similar power. I was saying Motordyne has the option to add cats into their CBE. The PPE headers can get pricey, but you have the option for that merged collector that flows better than a standard collector with a cone, which I believe the type motordyne uses. It may be a cost of a few hp at most with normal Bolt on street tunes cars.

Z1, Motordyne, PPE, and Fast Intentions are the only worthwhile headers if you're gonna spend your hard earned cash, that my opinion.