Before this turns into another debate about high water temps using a GRS unit
IMO at the mo for the
S2 the GRS is possibly one of the better intercoolers available "off the shelf", for the S1 i think we are still waiting for a good unit to come onto the market, which is why i looked into doing something different( before the spray-job the cooler sat in place of the front bumper

), now i have got one nearly done, ( still have a few more tweaks to do to it), i am going to look into possibly offering the set-up for general sale.
On the rollers, when the cooler was in its old position it ran VERY low temps, and at national day 02 on the track it never read over 30degrees all day