Well...I purchased my Si a few months ago and had some engine work done. When I purchased it the RPM rage seemed a bit to high so I had a stock tranny put it and it still seems off. When I am going 100 in 5th gear I am at 5 1/2 RPM's. Thats seems high to me. I talked with my friend and he has my same engine but he said he can go 120 and be at 5 1/2 rpm's. Is there a different transmission I am supposed to have or is it something special. Let me know because I am lost at this situation! O_o