Waiting for your block to make more power? you planning on oversizing? I thought the power came from the head more so than the block.. Hey is that a DNX header? Looks exactly like the DNX I just bought and istalled, i did have a major exhaust leak, after I installed header was a tremendous difference in throttle response and torque, like wow. Wish I wouldn't have had bad exhaust leak so I coulda seen difference from normal manifold and my cat was already gutted so still duno difference from o.e.m. But was a huge diff majorly in 1st, and all thorugh second. now coming out a curve in 2nd gear it pulls great. u like the header now?