These are 2 complete sets of Mercruiser Fuel Injection intake manifolds and plenums from a pair of 2000 model year Mercrusier 502 MPI engines. They are compatible with the Mercruiser MEFI 3 electronic engine control system. They were removed from working engines as part of an upgrade to Mercury Racing 500 efi set-ups. They include the following: (2) intake manifolds, (2) intake plenums, (2) fuel rails, (18) fuel injectors- 8 installed in each manifold and 2 new spare injectors purchased from Marren Fuel Injection for $95.00 ea. The Plenums are complete with working sensors, throttle body assemblies, and aftermarket K&N Flame Arrestors and Filters purchased for $200.00 ea. Includes all intake and plenum bolts. Does not include the thermostat assembly. Buyer pays actual shipping cost. If seriously interested, contact me and I will calculate shipping costs prior to purchase. If these parts don't sell as a lot, I will consider parting out separately.