Hey man, thanks for the info. Other than the sound difference by going Tubular I cant really think of a need for it aswell. It was just something I considered, as I wasnt 100% sure on the flow limitations of those manifolds... I like the idea of running the cast manifolds and running an up-pipe similar to the B5 S4 034 Motorsports STK kit.

Very happy to hear I can get away with 1 450 pump, if e85 was readily available, I'd go that route in a heartbeat... for now I will stick with 93 oct.

Assuming the remainder of my questions that didnt get answered are all spot on and right where I need to be?