My first run after lift and tires was to the local mountain. I was running 3-4K rpm and getting 35-45 up the mountain. Not bad in town but on the highway I stayed in 4th at 2500-3000 best I could get on the lfat 62 on my speedo which has been regeared. To run with the rest of the boys I need a regear to 4:88s which will have to wait. The four banger sings nicely and when trailing it seems like it will climb anything in 4H or 4L. So it may be all in the gears and has nothing to do with engine performance. However if you used all the old stuff on your engine you may have to do some troubleshooting to make sure everything is working right. I got mine figured out because it wouldn't pass the smog test. So I pretty much have all new sensors, ignition stuff and exhaust. Runs great.