Holley EFI Engine Intake Manifold
300-137
INTAKE MANIFOLD, LS1 EFI SINGLE-PLANE;Includes mounting bolts & washers. Also includes O-ring cylinder head mounting flange gaskets for an OEM style seal. Kit does not work with factory fuel rails and requires the use of Holley Fuel Rail Kit P/N 534-219. NOTE: The EFI versions of the LS HI-Ram intake manifold and fuel rail are designed to accept Bosch Style EV-1 or Magneti Marelli Pico fuel injectors. OE LS fuel injectors may not fit properly in the Hi-Ram EFI intake manifold fuel rail assembly. There is a kit available separately for the LS7 Hi-Ram EFI to allow the use of stock LS7 fuel injectors, P/N 300-230 (see below in the service parts section).;holley; manifold; holley manifold; intake manifold; edelbrock; professional products;Holley Single Plane EFI Intake - GM LS1/LS2/LS6;Single Plane EFI LS Intake Manifold. All GM LS Gen III or IV engines equipped with LS1/LS2/LS6 style cathedral port cylinder heads.;2500-7000 RPM power band;4150 Square bore flange;Optimized runner layout and constant cross sectional area - broad torque curve, best vehicle performance from 2500-7000 RPM;Minimum carb flange height - fit in vehicles with minimum hood modifications;Cast aluminum construction - great manifold for centrifugal blower, turbocharged or NOS power adder applications;Efficient casting design - lightweight, consistent wall thicknesses, improved casting quality;Weight - 11.5 lbs.;Height (front) - 5.417" to the lifter valley cover flange at the engine block front flange;Port size - 2.50" height x 1.15" wide;Includes Viton® O-ring intake to cylinder head gaskets - Viton® is a registered trademark of DuPont Performance Elastomers;Kit does not work with factory fuel rails and requires the use of Holley Fuel Rail Kit P/N 534-219