During the break I managed to get up to Willowbank in my FG XR6T, the car is pretty much standard except for an XR8 air box and K&N air filter. I also bought a set of semi slicks of ebay (the semi slicks were worth every cent the car hooked up awesome), but the car hit the rev limiter in every gear before shifting (in sports mode). I have never experienced this before and am thinking that is must have something to do with the semi slicks as they are 17's and quite a bit smaller diameter than the standard 19's. Does this sound right? Is there some sort of speed sensor issue that the smaller diameter tyres are causing? By the way I only got two runs with a best time of 13.6.