Snow Performance's Stage 3 Boost Cooler water/methanol injection kit (PN 20100) comes complete with pump, controller, Boost Juice, hardware and instructions for an easy installation.

With a mild 350 making 1 hp/ci (350 hp), you should be safe with a 57-gph-rated pump. GPH = 350 hp 6.1 = 57.4 If you don't know the flywheel horsepower, you'll have to jump through a few more hoops: ...