its weird foxspeed, its a mixture of, idling a touch below 1000rpm or a touch over, or a touch under 1500rpm. theres no pattern as to why it does it. ie cold warm etc just random. doesnt sound bad thou even a touch under 1500rpm, and now and again very slight flucuations, but worth it to be fair for how the car feels. like i siad i let my mate drive it now and again, he had ago last night, and could beleive how quicker and responsive it was, he even let of the throttle because because he was abit wary of going any faster.
Who every says 4mm doesnt make a difference is lying. Lmao