Page 114 of GM Performance Parts 2006 Catalog by GM Parts Direct

112 CRATE ENGINES BIG-BLOCK Ram Jet 502 Fuel Injection System The Ram Jet 502 fuel injection system, P/N 12499249 makes it easy to have electronic fuel injection on any 1976 and older vehicle originally equipped with a carburetor. The secret is the industry leading MEFI 4 controller. This controller fits in the palm of your hand and was originally developed by GM Powertrain engineers for marine applications. MEFI 4 is ideally suited for use in street rod and street machine applications. Installation is simple as the Ram Jet 502 ships with the wiring harness, new MEFI 4 controller, and detailed instructions. Once installed in the vehicle, a user needs only to supply 12V power and fuel. The revised MEFI 4 controller has improved electronics and a closed loop capability to give a smooth idle and better performance. PART DESCRIPTION QTY. 12386610 Manual, service, big-block ram 1 12489400 Tool, diagnostic trouble code 1 12490939 Manifold, lower intake 1 12555320 Shield intake manifold oil sph 1 12366985 Gasket package, intake manifold 1 12367959 Bolt/screw package, intake manifold 1 12490505 Manifold, upper intake 1 12489372 Gasket, upper intake manifold 1 12487372 Hose, fuel feed 1 22514722 Seal-o-ring 1 12487373 Hose, fuel return 1 22516256 Seal-o-ring 1 10216948 Tube assembly fuel press reg vac 1 88961968 Harness assembly, engine wrg 1 10456208 Sensor assembly knock 1 12489595 Bracket assembly, transmission cable 1 PART DESCRIPTION QTY, 12489596 Bracket assembly, transmission and throttle cable 1 12489597 Rod, throttle control 1 1104060 Distributor assembly ignition 2 1115491 Coil assembly ignition 1 12464482 Manifold, lower intake 1 12464484 Manifold, upper intake 1 17113524 Body assembly throttle 1 12490257 Cleaner kit, air 1 12569240 Sensor assembly map 1 25036751 Sensor, intake air temperature 1 17090919 Injector assembly, TBI fuel 6 MI 8 17113222 Retainer kit, fuel injector 1 17120039 Rail assembly, m/port, fuel injection fuel 1 17113517 Regulator assembly, fuel pressure 1 88962718 Module assembly engine cont. 1 15326386 Sensor, engine cool temperature 1 NOTE: This kit includes these major items plus brackets, sensors, bolts, nuts, gaskets, and other small parts. 3- 5/8 11 7- 7/8 Top of block Front of block 1- 1/16 Use this chart to measure underhood clearance.

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