Holley EFI - Holley Modular Lo-Ram EFI Manifold LS1/2/6 you have multiple options on

you have multiple options on where you can mount the unit

Valve Spring - Sure Seat - Single Spring / Damper - 357 lb/in Spring Rate - 1

83 in Body at Thread - 0

Compatible with all transducers that utilize 1/8 NPT male threads and 7/8" or smaller body/hex diameter

Holley EFI - Holley Modular Lo-Ram EFI Manifold LS1/2/6 you have multiple options onThe 300 620 plenum entry configuration is designed to allow the included Hi Ram 105 mm plenum top to be fitted to a low profile base intake manifold. The short runner, low profile base intake manifold intended for forced induction applications was conceived to package with an air to water plenum mounted intercooler with a shorter overall height than possible with other existing intake manifolds.