I'm getting BBk longtubes, bbk X-pipe, and flows installed. Just wondering what kind of increase in my rwhp and rwtq I should be looking at?? I can't wait!
Total...say 15-25 at the rear wheels (assuming the previous setup was all stock). Just as a side note, start it up without the pcv line to the exhaust and run it for a while after the header install. I'd hate to hear about another motor sucking oil if anything was in there and got sucked up into your intake. Mac are the only product that have been poor enough quality to cause this so far but you can't be too carefull with that much $$ wrapped up in a motor.
He has a densecharger intake. But remember he picked up 31 RWHP with just the headers. He actually had the prochamber, dumps, and intake on before the headers. So yeah, he picked up 31 RWHP with just headers... on a GT!
My guess since you are going from completely stock exhaust (right?) to full exhaust is 25-30 RWHP. Dunno about torque...Cobras like to breathe so I'd expect a good gain if I were you. You are gonna love the headers and definately the butt-dyno 2000 will register a gain... woo-hoo for butt-dynos!