I just can't believe the amount of people that have Water temp issue's with these Coolers.

If you use old shit, you will have issue's. Replace the Radiator, or have it recored. Mine is still the standard Rad, but has been recored. My fans come on in 2 stages, one at 90° and one at 92°. They quickly drag the temperature down and then cycle nicely. It never over-heats.

Also, make sure the Modine isn't blocked and the Thermostat housing is nice and clear and has a new stat in it.

Mine is perfect from every respect with the GRS. Good coolant temps and fantastic ACT's, even with 30psi. Speaks for itself I think.

Pro Alloy's stuff is AMAZINGLY well made and all of their products are spot-on, however the RST Intercooler's need some developing. I just can't imagine where the problem is, I hope they sort it.