Holley EFI - 300-123

Holley LS Hi-Ram EFI Manifold GM LS1/LS2/LS6

LS1/LS2/LS6 Cathedral Port EFI for 1 x 105MM Throttle Body

• Intended for use on N/A or forced induction engines in the 6.0 to 7.0+ liter range, max power at 7000-8000+RPM.

• 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 in² to 2.53 in²
• Throttle Body Flange Location, with 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” Wide