Holley EFI LS3 Low-Ram Intake Manifold - 105 mm Throttle Body Flange - Tunnel Ram - Top Entry - Dual Injector - LS3 - GM LS-Series 421991 Featuring built-in arm restraints

Featuring built-in arm restraints

Knurled (hand adjustable) primary and secondary curb idle screws allow for easy idle adjustment without the use of tools

And it's whisper quiet

which provides high tensile strength

This flow control valve will correctly reduce flow to the OEM spec of 2GPM

Holley EFI LS3 Low-Ram Intake Manifold - 105 mm Throttle Body Flange - Tunnel Ram - Top Entry - Dual Injector - LS3 - GM LS-Series 421991 Featuring built-in arm restraintsEngine 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