standard the ek4's have different cams, pistons, no lsd gearbox and a few other changes, can't remember them all as i'm not a massive jap fan.

EK4's also have a different spoiler and side skirts to my mates, it has ek9 headlights in you might be thinking of the facelift model with the different front end.

was out having a play in it tonight, takes so much abuse constant abuse and dosent miss a beat!!

think me and him built a decent motor.