SKU: 49603279757

Holley Modular Lo-Ram EFI Manifold LS1/2/6 - 300-621BK

Sale price$494.98 Regular price$549.98
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Description

Holley Modular Lo-Ram EFI Manifold LS1/2/6 - 300-621BKOverview: 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

Overview:

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)

Application:

Year Make Model Submodel Engine Size
Universal

Specs:

Brand Holley EFI
Color Black
Construction Cast
Emission Code 3
Engine GM Small Block Gen III/IV (LS Based)
Finish Black
Flange Style EFI
Front Height 6.86" height with throttle body adapter
Fuel System Type EFI
Manifold Type Lo-Ram
Product Type Manifold
Warranty Limited 90 Day
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 49603279757

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Joys Review
Port Orchard, US
★★★★★ 1
Hard and leathery gray in color!
Size: 8 Ounce (Pack of 1), Set name: Standard
These treats were like a horrible texture they were chewy but hard the dog had a problem eating them took her forever to chew one little piece disappointed and they were like a odd color grayish seem like an old bag very disappointing
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Reviewed in the United States on May 16, 2023
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mE, yoU & TiTuS (♥️PluTo)
Boise, US
★★★★★ 4
First shipment was quality
Size: 8 Ounce (Pack of 1), Set name: Standard
Initial delivery was impressive. No odor no additives and longer pieces. Second bag was full of short, burned pieces. Expense would be worth it, if quality control existed.
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Reviewed in the United States on June 19, 2024
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lisa s
Louisville, US
★★★★★ 5
Great dog treats
Size: 8 Ounce (Pack of 1), Set name: Standard
Great treats. My lab loves these
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Reviewed in the United States on December 10, 2025
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Casa De Oro
Natrona Heights, US
★★★★★ 5
2 thumbs up
Flavor Name: Chicken
We tried all the "chips" and the chicken is my dogs favorite! Love the simple ingredients. Great crunchy snack!
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Reviewed in the United States on May 17, 2026
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Agreen
Bozeman, US
★★★★★ 5
Our dog loves them!
Flavor Name: Chicken, Flavor Name: Chicken
We are very impressed with these Gaines Family Farmstead Chicken chips! Our dog is picky and she absolutely loves them! She just turned 13 so we are trying to give her the best and healthiest. These chicken chips have only one ingredient so they are perfect! We will be ordering again!
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Reviewed in the United States on October 9, 2025

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