I've just had the HKS intercooler piping kit fitted, and i thinkit's made a difference (sometimes it's hard to be objective - you want it to be better http://www.ltregister.f9.co.uk/graphics/happy1.gif border|EQU| 0 align|EQU| absmiddle >). On my Makinen i have a full exhaust inc downpipe but no elbow, and intake kit. The car had lost some low down torque at the expense of high end improvement. It feels like the piping kit has replaced some of that low end, while improving pickup through out the range. Slight problem with the fitting as it seems the Mak has a larger intercooler, so had to use the original hoses to join the intercooler, not the ones supplied.