Intake manifold GM LS3 A cast aluminum intake for EFI (Electronic fuel injection) with all hardware included to mount (Except injectors) to fit Chevrolet, Pontiac, GMC and GM LS3, L92. This intake comes in a nice finish, lightweight aluminum and O-ring seals to avoid unnecessary leakage. This aluminum intake is suitable for engines that rotate between 2500-7500rpm. Specifications : Height: 11.8(30cm) Damper size: 92mm Damper angle: 25° Equipped with vacuum ports at the rear. (3/8 R thread) Not compatible with original fuel rails. O-ring seals included, bolts included, fuel rails included.