Hi, I made a snorkel for my 90 a couple of months ago . Very pleased with the result. Went to scrap yard and got some heater vent pipe and used a piece off a ford car, air filter pipe that had a bend in it made in hard plastic and flexy bit at the top to my drain pipe . Bit of a job to get inside vent fitting out from inside of wing but cut with small hacksaw across fitting and pull out. Then I pushed through small gap between wing and heater the flexy heater hose and connected to original flexy tube to filter. Works great and it cost me £5 for bits from scrap yard . Hope this helps you mate..