Holley EFI LS3 Low-Ram Intake Manifold - 105 mm Throttle Body Flange - Tunnel Ram - Top Entry - Dual Injector - LS3 - GM LS-Series 421991 Provides cushion for the knees

Provides cushion for the knees when accessing cargo in the truck bed

Featuring built-in arm restraints

To ensure proper fit

which provides high tensile strength

FC/FF W/MSD

Holley EFI LS3 Low-Ram Intake Manifold - 105 mm Throttle Body Flange - Tunnel Ram - Top Entry - Dual Injector - LS3 - GM LS-Series 421991 Provides cushion for the kneesEngine Intake Manifold Provides best performance for forced induction (supercharged or turbocharged) engine applications with peak power at 7000 8000 rpm, depending on the application Dual injector, separate passage, high volume fuel rails with mounting hardware, dual fuel capable, 8 AN o ring ports Low height to aid the packaging of a plenum mounted air to water intercooler in a top feed configuration Available with both as cast satin and black power