The Pro-R has proven itself to be one of the hottest new platforms for tuning. The stock cast housing with press fit hose barbs is prone to failures and leaks related to multiple heat cycles allowing these fittings to work themselves loose. The ZRP Thermostat housing features all O-ring boss AN style fittings that thread it thus preventing future failures this construction allows for customized applications with various fitting combinations to suit your needs. Available as a factory replacement with all required fittings or as a bare housing to allow for custom applications.
