Holley 300-621 LS1/LS2/LS6, Ultra Lo-Ram Intake Manifold Kit, Aluminum, Natural

Holley 300-621 LS1/LS2/LS6, Ultra Lo-Ram Intake Manifold Kit, Aluminum, Natural

$861.58
MSRP: $984.00
(You save $122.42 )
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SKU:
HLY300-621
MPN:
300-621
UPC:
90127077573
Condition:
New
Weight:
28.44 LBS
Shipping:
Calculated at Checkout

Applies To Continental U.S. orders only

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The Holley LS1/LS2/LS6 Ultra Lo-Ram intake manifold kits are designed for GM LS Gen III and IV engines equipped with GM LS1/LS2/LS6 (cathedral port) 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 and the 105 mm 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.
The 300-621 Lo-Ram plenum entry was configured to provide a very low profile modular intake manifold suitable for turbocharged or centrifugally supercharged engines.
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 LS1/2/6 (cathedral port) cylinder heads
  • Designed for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm depending on the application.
  • With forced-induction and the short runner length the engine rpm at which peak power occurs is more likely to be coupled to the supercharger or turbocharger being used
  • Modular design allowing the use of front-feed plenum entry
  • Intake design facilitates custom inlet duct and throttle body placement
  • Low height to fit under a stock or mildly modified hood in the front configuration
  • Front entry plenum flange allows design & fabrication of special throttle body adapters or inlet ducts for custom installations
  • Clears 4th Gen Camaro and C5 Corvette cowls and hoods without modification
  • High volume fuel rails and mounting hardware included with ¾”-16 o-ring ports (8 AN)
    • Engine Block Style:
    Stock/OEM standard deck
    Basic Operating RPM Range:
    3,500-8,000
    Intake Style:
    Fuel Injection
    Material:
    Aluminum
    Finish:
    Natural
    Height:
    6.860 in.
    Injection Style:
    Multi-port
    Throttle Body Bore Size:
    105mm
    EGR:
    No
    Has Bosses:
    No
    Bosses Machined:
    No
    Boss Quantity:
    N/A
    Injectors Included:
    No
    Fuel Rails Included:
    Yes
    Aftermarket Fuel Rail Required:
    Yes
    Throttle Body Included:
    No
    Quantity:
    Sold individually.
    Make:
    Chevrolet
    Engine Family:
    Chevy small block Gen III/IV (LS-based engines)
    Engine Sizes:
    4.8L/294-6.0L/364
    Years:
    1997-2017
    Cylinder Head Style:
    Cathedral port