Cut down on pollution and cool your engine with a reliable Edelbrock Universal Heat Exchanger; Streamline the transfer of heat away from your supercharger for optimum performance; Durably constructed from light weight aluminum for use with hard-charging street applications; Edelbrock Heat Exchangers sport a 3/4” barbed inlet and outlet and 6Mx1.0 threaded bungs; Your Edelbrock Universal Heat Exchanger is covered by a 1-year warranty Heat Exchanger Repair-gctid788619 01-15-2017, 05:41 PM I bought a used 350 last year and it runs great however the heat exchanger has a leak allowing salt water in and anti freeze out...I got through the season then flushed the engine real good with salt away but now I need to either repair or replace the heat exchanger. New Listing MERCRUISER 3.7 LITRE, 165, 170, 185, 190, 465, 470, 485, 488, 4" HEAT EXCHANGER The key personnel here have over 40 years experience in the hydraulic industry and with the group philosophy of providing the most efficient and professional hydraulic and pneumatic parts supply service for all major brands.