Congrats.... great numbers for a pre-tune. I think these pipes will be in my future. You will be really surprised at the performance increase with the tune. It will be the single best mod you have done to date. As far as the C3 - 178 debate....... You will be looking at what..... 300 - 400 outlay after you sell the C3 and purchase a 178? IMO, I just do not see any advantage to doing that. Especially considering the cost associated with it.