I'm running the AEM ems. It's the best i've seen..... it works great with my 550 cc injectors and holly 255lph fuel pump. I'm running 8.1 comp. and 12lbs of boost on a built bottom end.... it makes a concervative 300 whp and 260 wtq. it's is a 2.0L with a type r top end..... max horse is made at 5500 rpm....... :!: