I have just been running the new motor in and only running it up to 6.5 k RPM. I had to make a silencer up for the muffler and the long run in drove me around the bend. It sounds mental with out it fitted, more like a skyline with these headers fitted. The weight factor sold me over the stock headers. still need to connect a boost gauge to see what its running.

Simon , I would like to get it on your mates dyno on your return. after that is sorted will do the sprints pending I can get there on time with the car/ I will call on Rosco for assistance with the power FC I have here for it.