The Holley GM LS3/L92 Hi-Ram intake manifold offers a cost-effective, cast-aluminum alternative to fabricated sheet-metal intakes for applications where overall height isn't restricted. Paired with LS3/L92-style cylinder heads, it suits naturally aspirated or forced-induction engines in the 6.0-7.0+ liter range, with EFI fuel rails machined for -8AN O-ring fittings. This version is configured for a larger 105mm throttle body.
Specifications:
- Compatible Engine: GM LS3/L92
- Throttle Body Bore: 105mm, longitudinal-mount EFI plenum top
- Finish: Natural cast aluminum
- Recommended Engine Size: 6.0-7.0+ liters
- Recommended RPM Range: 3,500-8,000
- Recommended Use: Naturally aspirated or forced induction
- Runner Length: 6.50 in, as-cast
- Total Height: 12.32 in (to lifter valley cover flange)
- Throttle Body Gasket: Included
- Part Number: 300-117
Manifold has provisions for one 3/8 NPT and two 1/8 NPT fittings.
Compliance: This part is legal for sale and use on Racing Use Only Vehicles — competition vehicles that are not registered and never operated on the street. It is against the law to install this part on an Emissions Controlled Vehicle (1966-and-newer California-certified or 1968-and-newer federally certified vehicles).
FAQ
What engines fit this intake manifold?
GM LS3/L92 engines in the 6.0-7.0+ liter range.
What throttle body bore does it use?
A 105mm longitudinal-mount EFI plenum top.
Is this manifold legal for street use?
No. It is legal for sale and use only on Racing Use Only vehicles and cannot be installed on an emissions-controlled street vehicle.
What's the recommended RPM range?
3,500-8,000 RPM.
