Looking to kill the heat in the summer, or increase the AC function in your mk1? This is a cable controlled bypass valve, it will work in your mk1 by modifying your cable length (shorter) and give you the option of sending the hot coolant back to the motor without coming into the cabin. This is also useful and almost required with any later model motor swaps as they worked on a blend door system and kept the coolant flowing, never blocking it off like the mk1 chassis does.
Attached when you purchase is a digital instruction form on installing this valve, you will be left to your own devices for trimming hoses, cables and fitting it into your bay.. but we included some pics on our site of what we have done.
- IF you wanted to install this in any vehicle with a blend door system you could simply buy a universal cable and attach it under your dash or just go out to the car and flip it when the cooler weather comes..