High quality polished billet alloy thermostat housing to suit all Small Block 273, 318, 340, 360 engines fitted to AP6-CM models & Big Block 361, 383, 400, 426 & 440 engines along with the below US Mopar models. This housing uses a heavy duty o-ring rather than a gasket to seal & is guaranteed not to leak as long as your manifold flange is straight & not warped! Comes complete with polished stainless steel hex head bolts.
