Holley LS Hi-Ram EFI Manifold-LS1/LS2/LS6 Cathedral Port EFI with 105MM Throttle Body The Holley GM LS1/LS2/LS6 Modular HiRam Intake Manifold is introduced as a cost effective alternative to fabricated sheetmetal for highperformance applications where induction system height is not limited. Coupling this HiRam intake with the high flowing LS1/LS2/LS6 style cylinder heads has outstanding potential for N/A and forced induction applications at a budgetminded cost. Aggressive, bold, racebred styling will make bad intentions clear for drag race, muscle car, marine, offroad, sandrails, pulling trucks, track, streetrod applications and more!The base is designed to be modular in configuration to accept a wide range of carbureted and EFI tops and to be attractive to builders and fabricators as the foundation for custom induction systems. Runner length and the tapered crosssection designed to perform well for a wide range of engine configurations EFI fuel rails are machined for 8AN Oring Fittings with passages large enough to accommodate high fuel flows and dampen pressure pulsations in the fuel system and come standard with EFI HiRam kits. Intended for use on N/A or forced induction engines in the 6.0 to 7.0+ liter range, max power at 70008000+RPM. These parts should be used for the following applications: Racing/Performance/Street Rodder where hood restrictions are NOT a consideration. Top can be mounted forward or backward. Holley EFI LS main harnesses have a map sensor connecter designed for use with an LS1/2 style map sensor. The 558-416 is an adapter harness that can be used to adapt any LS harness that uses a LS1/2 MAP sensor connection to a LS3 MAP, which is recommended for this manifold. Features: Base Plenum Top Mounting Flange Height 8.42 to the lifter valley cover flange on engine block.
Total Height with 92/105mm EFI Plenum Top 12.32 to the lifter valley cover flange on engine block.
Runner Length 6.58, As-Cast Runner Cross-Sectional Area Tapered 4.25 in to 2.53 in
Throttle Body Flange Location, with 92/102mm EFI Plenum Top : Height 8.42 (from engine block lifter valley cover flange), Longitudinal Location 3.84 (forward from engine block front flange), Angle 25 deg. (down from vertical)
Plenum Top Gasket Type 3/32 Round O-ring Cord
Mounting Flange Gasket Type Standard LS3 Molded O-Ring
Port Size 2.49 Height x 1.21 WideDragPartsUSA.com offers Holley LS Hi-Ram EFI manifold-LS1/LS2/LS6 Cathedral Port EFI with 105mm Throttle Body 300-123 at low everyda prices. Be sure to check out all of our products from Holley Performance Products including Holley Performance Products Holley Intake Manifolds - SBC.Pit Stop USA offers Holley LS Hi-Ram EFI manifold-LS1/LS2/LS6 Cathedral Port EFI with 105mm Throttle Body 300-123 at low everyday prices. Be sure to check out all our products from Holley Performance Products including Holley Performance Products Holley Intake Manifolds - SBC.Product Description: Intake Manifold, LS Hi-Ram EFI, 105 mm Throttle Body Flange, Multi Port, Aluminum, Natural, LS1/LS2/LS6, GM LS-Series, Kit