SKU: 63460473297

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: 63460473297

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4.4 ★★★★★
Based on 12 reviews
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M
Verified Purchase
Monee Loyalty
Port Orchard, US
★★★★★ 1
Pilling
I loved these pants very much when I first purchased them the fit was amazing and the length was even better. Pants are very flattering. I wore them for the first time a few days ago only for a couple hours and pilling happened immediately! I am very annoyed at that fact because I purchased these pants at the end of March and I am not in my return window! I am Not a happy customer at all. Waste of money
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Reviewed in the United States on June 2, 2026
C
Verified Purchase
CH
Pawtucket, US
★★★★★ 5
Bought again but note the material was different .
Fit Type: 33" Inseam, Size: Medium, Color: White
Love these pants . Good quality. Good material and made well. Bought a second pair but they are lighter weight material which is nice for the summer. Will buy again. First heavier white material did not shrink. Not sure about the most recent material as I haven’t washed them yet. Size true to fit
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Reviewed in the United States on May 30, 2026
T
Verified Purchase
Tracy S.
San Leandro, US
★★★★★ 5
Perfect linen pants
Absolutely love these pants. They are high quality material and well made. The legs aren’t too wide and the wide waistband with drawstring is very flattering. Perfect transition piece between seasons but are lightweight enough to wear during the heat of the summer. I liked them so well I bought in three other colors.
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Reviewed in the United States on April 30, 2026
L
Verified Purchase
L. Howard
Houston, US
★★★★★ 5
So flattering and comfy!
Fit Type: 31" Inseam, Size: Medium, Color: Deep Khaki
These are so cute and comfy, plus natural fiber. I got the brown and I’m coming back for the khaki. Love! *I’m 5’8” 136 lbs, got the 31 inch size Medium. They were super big until washing/drying- still big but I think Small would be too small. They are a very flattering fit, especially with the cute back pockets.
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Reviewed in the United States on April 15, 2026
S
Verified Purchase
Suzy Q
Charlottesville, US
★★★★★ 4
HIGH waist, correct sizing, ok fabric...NOT SEE THRU!! Cool pants though!
Fit Type: 31" Inseam, Size: Medium, Color: Deep Khaki
If it's a few inches ABOVE my belly button, inseam is correct... but then MED is SUPER baggy in the butt (I have a small butt maybe?) WELL MADE! NOT see thru!! Fabric is kind of stiff, BUT because it's a linen blend, may be beneficial for less wrinkles? 😃 Probably improve if washed. Also tried the small, belly/butt area is better, but super high and a little tight on me. NO off gassing 👏👏👏 Super versatile (dress up or down) Good price.
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Reviewed in the United States on April 23, 2026

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