to tell the truth mate its only when i hit traffic, i have only had the car a few months and the lad that had before me spent alot alot of money on it (engine wise) but just threw the rad and pace intercooler in very badly at that aswell and i thought when i sort it all out i might aswell get an alloy rad, header tank and the rest of the trimmings!!! the boot is full of new stuff ready to go on the car but its gettin done over the winter months when i get me garage