if i bought 1 wud it go straight on and r they easy 2 fit?

what car do you have?

I have a 94 wrx.

yeah its a straight swap :)

so wot differences will i notice compered to the 1 i got now?

the fueling and ignition timing are different in the z4 as is the rev limit.

the z4 has a similar map in it to the prodrive one.

i imagine you are now running on a w6, if so you will find your car will run a lot better with the added benefit of more power(20ps)

well worth doing in my opinion :)

I would notice a difference when drivin? how can i go about gettin one? cheers dan

Jonny Gav has said it all really.

W6 ECU 11.4psi, Z4 12.7psi with a fuel/igntion map that 'on paper' looks like it will work. Which is more than can be said about the W6 map.

Yeh! I know the W6 runs, but if you saw the maps you would wonder HOW!! :)

:( that's what I've got in mine - but not for much longer if I can get hold of David W :D