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TracTuff K Series RSX Billet Thermostat Cover


This version has been machined to remove the female thread and has a custom bent tube welded to the end to mimic the factory RSX outlet angle.

The Billet Thermostat Cover bolts to the OEM plastic housing using original shoulder bolts, OEM thermostat, and OEM gasket for the K20A, K20A2, K20Z1 or any other K variant that shares the same housing. I chose to design the cover to hold the original thermostat rather than a generic alternative because I felt it was the main contributor to cooling system problems, where the original cover was ditched.

You wont find any sensor ports on the cover because they don't belong here. You wont find a swivel feature because it doesn't work for everyone anyway. Instead, you can communicate your special needs and I can weld something custom for you.

NOTE: Made to Order - Contact for ETA - If you are interested in a specific design that varies from this, please email us at The billet thermostat cover does not include a thermostat  In order to run this product, you MUST use a 2002-2006 Acura RSX or 2002-2005 Civic Si (P/N: 19301-PNA-003) thermostat. I ONLY recommend Genuine Honda. 

Multiple swaps may benefit from this configuration, however, you will need approximately 1.00" of additional space in front of the OEM thermostat cover to work. Customers that have ordered this standard hose configuration have shared that the OEM RSX lower hose has worked when the radiator outlet is in the same location as the RSX outlet. If you are choosing the AN connection option, I strongly recommend that you either have a dual pass type radiator where the outlet is as far away as possible or you move your outlet.

"All Others" Mod