This is a cylinder 4 cooling mod for the Subaru WRX and STI. As most Subaru enthusiast know the ring land issues with the Subarus, especially on cylinder 4 due to stagnant coolant around that cylinder. This mod helps with that. It ties into your existing heater hoses down the back of the driver’s side head and helps coolant move through that area much better. In turn helping cylinder 4 run at a more normal temperature.

You will receive the following:

Gates 5/8 Heater hose

4 clamps (1 installed)

45 degree fitting

5/8 “T” fitting

cylinder head to 10an fitting

Gasket cylinder head fitting

****THIS IS FOR THE MOD WITH THE 45 DEGREE FITTING****

This is NOT an OEM subaru part. This is a aftermarket part. I do except returns if there are any issues. I do sell with 90 degree and 45 degree fittings so please make sure you know witch one you need.