Simon - I installed a Fumoto drain valve in my car. I have an aftermarket radiator, which had a stopcock valve that directed antifreeze onto my a/c compressor and then all over the garage floor. The Fumoto valve turns the drainage 90 degrees from the radiator, and also allows you to attach a hose and control where the anti-freeze goes when you change your fluid. Obviously, because this fits an aftermarket radiator, you will need to check to see if a M14 x 1.5 will fit into your stock radiator, but you should be able to test this with an M14 x 1.5 bolt.
The new Fumoto Fumoto® SX-series can be rotated 360° when it is installed, allowing you to choose the position and the oil flow direction for a smaller profile and easier access for maximum protection and further convenience oil drainage.
www.fumotooildrainvalve.com