Damn, I just got home. Went up against a brand new Sentra SE-R Spec V with an exhaust/intake (I could hear it). We were on the freeway and went from 70mph. Actually he started accelerating to see if I would race so I agreed with my foot to the floor and pulling 2 car lengts on him from 70 mph - 100 mph and then I just shut off because it was not worth it anymore. Damn these ported exhaust manifolds kick ***. I think we are going to dyno the car because these things kick so much ***. Hard to describe the top end power of the car now, it just hauls. And the SE-R just proves that even more. But damn that thing must have no top end because it did a fly by, then slowed down, I caught up to him again and we just raced, I pulled same style and he just left off the freeway. So sad, very sad for him. But good for us since the test of the exhaust manifolds went well.
Time to go play
and see if we cant squeeze more out of the stock exhaust manifolds. I know there is more power. But right now I am guessing about 10-15HP on the top end easy but we haven't fully ported the manifolds to their max.