Base Manifold and Rail Kit for Lo-Ram 300-620 - 300-600
SKU: 72785672677

Base Manifold and Rail Kit for Lo-Ram 300-620 - 300-600

Sale price$299.68 Regular price$332.98
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

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Description

Base Manifold and Rail Kit for Lo-Ram 300-620 - 300-600Overview: 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 manifold and rail kits will work with OE (Original Equipment) or aftermarket cylinder heads. The 300 600 is the lower manifold in the 300 620 complete kit. Offering this separately allows you to select your components individually as you build your system. The Lo Ram intake

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 manifold and rail kits will work with OE (Original Equipment) or aftermarket cylinder heads. The 300-600 is the lower manifold in the 300-620 complete kit. Offering this separately allows you to select your components individually as you build your system. 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 low height to aid the packaging of a plenum mounted air-to-water intercooler in a top-feed configuration. The short runner, low-profile base intake manifold intended for forced induction applications was conceived to package with an air to water plenum mounted intercooler with a shorter overall height than possible with other existing intake manifolds. 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:

  • Base manifold and rail kit for Low-Ram 300-620 allows you to select your components individually as you build your intake system
  • Designed for GM LS Gen III and IV engines equipped with GM LS1/2/6 (cathedral port) cylinder heads
  • Low height to aid the use of a plenum mounted air-to-water intercooler in a top-feed configuration
  • Designed for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm depending on the application
  • 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 Silver
Emission Code 3
Engine GM Small Block Gen III/IV (LS Based)
Finish Cast
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: 72785672677

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shawn880
Massapequa, US
★★★★★ 5
very good wire for marine applications.
Size: 60ft, Style: 14 Gauge
Great stuff for wiring up a marine system. I like the gauge of the wires, how they are shielded and very sturdy. They deliver the power to the speakers well and I have had zero issue with them. I would definitely purchase again. The wires were easy to solder and are color coded black and red. I used nearly the full 100ft spool to wire up 4 8" speakers on a 24 ft Skeeter Sx240. I feel the price was competitive and having delivery to the house is a plus. I didnt have any problems stripping the wires, very easy.
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Reviewed in the United States on December 29, 2025
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Russell Burns
Phoenix, US
★★★★★ 5
Worked great for boat install
Size: 30ft, Style: 10 Gauge
Bought this to run some accessories on my boat. Worked great and well made. Flexible even with the coating. Made for easy work and should last. I wouldn’t hesitate to buy again if needed.
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Reviewed in the United States on January 19, 2026
I
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igomesf
Fort Morgan, US
★★★★★ 5
High Quality Durable and Easy to Use
Size: 100ft, Style: 14 Gauge
This marine-grade wire is exactly what I needed for my boat's electrical setup The tinned copper construction ensures excellent conductivity and corrosion resistance making it perfect for marine automotive RV and solar applications The PVC insulation is thick and durable providing extra protection against moisture and wear The wire is flexible yet strong making it easy to route through tight spaces without breaking or kinking This product offers great value for money excellent functionality and is easy to use If you need reliable waterproof and corrosion-resistant wiring for your boat or RV this is a fantastic choice Highly recommend
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Reviewed in the United States on January 31, 2025
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gnfo
Whiting, US
★★★★★ 5
Sturdy and works great
Size: 15ft, Style: 8 Gauge
Used this for an approximately 8' run in my electric UTV to power a 2500W inverter running off the 48V batteries so I could power AC tools out in the field. Very thick casing and nice and strong, but flexible enough to route around the frame of the UTV.
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Reviewed in the United States on December 17, 2025
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Alex Farmer
Battle Creek, US
★★★★★ 5
good quality
Size: 15ft, Style: 8 Gauge
good deal
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Reviewed in the United States on May 7, 2026

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