Holley 300-680 LS3 Ultra Lo-Ram Intake Manifold, 105mm Throttle Body Flange, Single Injector, Aluminum, Natural, Kit

$897.01
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SKU:
HLY300-680
MPN:
300-680
UPC:
90127100912
Condition:
New
Weight:
30.84 LBS
Shipping:
Calculated at Checkout

Applies To Continental U.S. orders only

Out of stock

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 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 Ultra 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 Ultra Lo-Ram 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 Ultra 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 configuration
  • Front entry plenum flange allows design & 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 separately.

Notes: Ultra Lo-Ram Base Intake Manifold Plenum Top Mounting Flange Height - 5.17" Plenum Configuration w/105mm Throttle Body Adapter - 6.86".

Instructions

Instructions - 199r11984.pdf

Emissions Warning
Products sold on this website may not be legal for use on public roads or highways due to Environmental Protection Agency (EPA) restrictions or California Air Resources Board (CARB) emissions regulations. Federal and State regulations may restrict Product installation to pre-emissions regulation (Model Year 1974 or earlier) or to competition/racing vehicles used exclusively in
1) events organized by recognized bodies, authorizing permits for participating drivers.
2) racing event qualification, and3) practice associated with events.
Installation
 of such products, including driving racing vehicles to and from the track, may be considered illegal “tampering ” or as “defeat device”, and may result in federal and state penalties. It is the purchaser’s responsibility to ensure compliance with all applicable emissions laws, including California’s stricter standards.

Proposition 65 Warning:
This product may contain chemicals known to the state of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

Engine Block Style:
Stock/OEM standard deck
Style:
Multi-port
Basic Operating RPM Range:
3,500-8,000
Material:
Aluminum
Finish:
Natural
Height:
6.860 in.
Intake Section Included:
Complete
Throttle Body Bore Size:
105mm
Fuel Rails Included:
Yes
Aftermarket Fuel Rail Required:
Yes
Has Bosses:
Yes
Bosses Machined:
Yes
Boss Quantity:
Eight
Injectors Included:
No
Throttle Body Included:
No
EGR:
No
Quantity:
Sold as a kit.
Notes:
Front-feed single injector manifold and fuel rails.
Make:
Chevrolet
Engine Family:
Chevy small block Gen III/IV (LS-based engines)
Engine Sizes:
6.0L/364-6.2L/376
Years:
2005-2017
Cylinder Head Style:
Rectangular port

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