Holley 300-680 LS3 Lo-Ram Manifold Kit, Single Injector, Satin

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Designed for GM LS Gen III and IV engines equipped with GM LS3/L92 cylinder heads•
Engineered for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm depending on the application.
Low height to fit under a stock or mildly modified hood in the front configuration

$787.95

Factory Shipped

This part will be shipped by the manufacturer. We estimate this item will ship on or before June 2nd.

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Product Summary

L76, L92, L99, LQ4, LQ9, LS2, LS3, LY6, Cast Aluminum

Designed for GM LS Gen III and IV engines equipped with GM LS3/L92 cylinder heads•
Engineered for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm depending on the application.
Low height to fit under a stock or mildly modified hood in the front configuration
Front entry plenum flange allows design and fabrication of special throttle body adapters or inlet ducts for custom installations
Clears C6 Corvette cowls and hoods without modification

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Key Specs

MFG. Part #	300-680
Brand	Holley
Intake Manifold Type	Ultra Lo-Ram
RPM Range	3,500-8,000
Material Type	Cast Aluminum

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Holley 300-680 Details

Available with single or dual injector provisions and a burst panel flange, the LS3 Ultra Lo-Ram intake manifold is designed for boosted combinations with hood clearance in mind. The Holley LS3 Ultra Lo-Ram intake manifold kits are designed for GM LS Gen III and IV engines equipped with GM LS3/L92 cylinder heads. These intake manifolds will work with OE or aftermarket cylinder heads. The Lo-Ram intake manifolds are designed for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm depending on the application. The front plenum flange has a 105 mm opening to work with throttle body part number 112-581 or similar models. The base intake manifold is designed with a lower overall height to fit under a stock or mildly modified hood in the front configuration. The LS3 Lo-Ram is constructed to provide a very low profile modular intake manifold suitable for fabrication of special throttle body adapters or inlet ducts for custom installations. Available with single or dual injector provisions and a burst panel flange options. The fuel rail kits come with two sets of brackets. A set for long (usually standard length) fuel injectors and a set for short (such as Pico, or LS7) fuel injectors.

Features:

Designed for GM LS Gen III and IV engines equipped with GM LS3/L92 cylinder heads•
Engineered for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm depending on the application.
Low height to fit under a stock or mildly modified hood in the front configuration
Front entry plenum flange allows design and fabrication of special throttle body adapters or inlet ducts for custom installations
Clears C6 Corvette cowls and hoods without modification
Available with single or dual injector provisions and a burst panel flange.
High volume fuel rails for eight and sixteen injector configurations. Mounting hardware included with 3/4-16 O-ring ports (8 AN)
Billet options for the top and throttle body adapters are available seperately.

Charts

Instructions (PDF)

Guides & Documents

Intake Manifolds Instruction Sheet (425300680)

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

CARB warning

Holley 300-680 Specifications

KEY SPECS
MFG. Part #	300-680
Brand	Holley
Intake Manifold Type	Ultra Lo-Ram
RPM Range	3,500-8,000
Material Type	Cast Aluminum

GENERAL
Speedway Motors Catalog Part #	425-300680
Fuel System Type	EFI
Injection Style	Multi-port
Finish	Satin
Color	Silver
EGR	No
Throttle Body Bore Size	105mm
Intake Section Included	Complete
Plenum Material	Aluminum
Plenum Finish	Satin
Base Finish	Satin
Base Material	Aluminum
Throttle Body Included	No
Injectors Included	No
Aftermarket Fuel Rail Required	Yes
Fuel Rails Included	Yes
Hardware Included	Yes
Overall Height	6.86"
Runners Included	Yes
Runners Removable	No
Supplemental Bosses Cast-In	No
Supplemental Bosses Machined	No
Emission Code	3
Sold in Quantity	Each
GTIN Code	090127100912