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$755.95
$679.95
Holley 300-621 Modular Lo-Ram EFI Manifold for LS1/2/6 Front-Feed
Holley 300-621 Modular Lo-Ram EFI Manifold for LS1/2/6 Front-Feed
LS1 Chevy LS V8, LS2 Chevy LS V8, LS6 Chevy LS V8, EFI Fuel System Type, Natural
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Holley 300-621 Modular Lo-Ram EFI Manifold for LS1/2/6 Front-Feed
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We estimate this item will ship on or before March 4th.
Part # 425300621
$679.95
$755.95
each
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Details
Fuel System Type:
EFI
Injection Style:
Multi-port
Intake Manifold Type:
Lo-Ram
Material Type:
Aluminum
Finish:
Natural
EGR:
No
Throttle Body Bore Size:
105mm
Intake Section Included:
Complete
Plenum Material:
Aluminum
Plenum Finish:
Natural
Base Finish:
Natural
Base Material:
Aluminum
Throttle Body Included:
No
Injectors Included:
No
Aftermarket Fuel Rail Required:
Yes
Fuel Rails Included:
Yes
Runners Included:
Yes
Runners Removable:
No
Supplemental Bosses Cast-In:
No
Supplemental Bosses Machined:
No
MFG. Part #:
300-621
Sold in Quantity:
Each
GTIN Code:
090127077573
Info
The Holley LS1/2/6 Lo-Ram intake manifold kits are designed for GM LS Gen III and IV engines equipped with GM LS1/2/6 (cathedral port) 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 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 in the front-feed configuration.
The 300-621 Lo-Ram front-feed 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-feed 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)
Notes:
- Lo-Ram Base Intake Manifold Plenum Top Mounting Flange Height - 5.17"
- Front Feed Plenum Configuration w/105mm Throttle Body Adapter - 6.86"
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Important Messages
- This item ships directly from the manufacturer. It may take an additional 25 business days for Holley to ship this item.
- Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
- This item ships via Ground Shipping only. Expedited and Air shipping options are not available.
Some parts are not legal for use in California or other states with similar laws/regulations
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Reviews
Q & A
Videos & Articles
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Dave gives a few tips on how to select the appropriate intake manifold for your project.
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Tim talks about his favorite intake manifold, the Might Edelbrock X1.
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Tim talks about the new Edelbrock powder coated cylinder heads and provides a little history on Federal Mogul heads.