if you are not bothered about the managment light being on,

keep the ST inlet track with bike throttle bodies or carbs, when setup PROPPERLY they will make a gain, the physics make it impossible not to have a gain.

oh and the noise mate......... propper wank material right there!

i ran a mk3 escort ST170 on 45`s as a daily at 8k rpm, so i know how good they sound