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You are looking at the best selling thermostat housing on ebay with 100% feedback!! , This is the ORIGINAL Genuine MMR and made in the USA! This item has been proven for 10 years and is not the leaky "UPR" copycat added in the last year here on ebay!!! 

MMR Inline Thermostat Housing/Bypass Line delete with 1/2" NPT Port 

Can be placed in upper or lower radiator hose, great for removing complicated and bulky lower radiator hoses . Perfect for removing factory bypass lines or to add one. The port can be plugged or also be used for a coolant temp sensor if needed using a 1/2npt to 3/8npt reducer. 5 Bolts flange prevents leaking like the cheaper 4 bolt style.

* For 1.5" Hose (in and out) or -16AN (in and out) OR COMBINATION
* Can be used to Adapt -16AN to 1.5" Hose
* Leakfree O-ring design (High quality, Hi Temp, USA Made Viton O ring included)
* 100% Made in USA BY MMR
* Accepts traditional Thermostats/gaskets (not included) (Uses 54mm Thermostat - such as Stant 13006 or 45356  & Gates 33616 thermostat gasket)
* If you do not wish to use the port, it can be simply plugged using a 1/2 NPT plug fitting.
* Part easily unbolts for Thermostat installation or replacement

Absolutely no returns on performance items, see our 100% positive feedback since 2004 and purchase with confidence