You Cossie guys can't really judge the RST stuff. For a Cossie, I would definately get the Pro Alloy cooler, however, the RST one just didn't give the results. The quality is second-to-none, of that there is no doubt, but the GRS is certainly doing the business from a performance point-of-view.

Cruising temps of 4-5° above ambient, light boost see's very little rise in temps and even 2-bar of boost has not seen over 40° so far.

Graham's (GRS) wait is normally around 4-5 weeks. All his stuff is made to order, by hand.

I'm not sure what it is about the Pro Alloy cooler and I am sure that the boys will suss it out, but the Gen 1 and Gen 2 coolers just don't work as well as the GRS.