Base Manifold and Rail Kit for Lo-Ram - LS1/LS2/LS6
Type: Intake Manifold Base | Fits: Ram
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)
Specs:
- Basic Operating RPM Range: 3500-8000 RPM
- Brand: Holley EFI
- Category: Engine
- Color: Silver
- Construction: Cast
- EGR Port: No
- Emission Code: 3
- Engine: GM LS1/LS2/LS6
- Finish: Silver
- Fuel Injectors Included: No
- Fuel Rail(s) Included: Yes
- Fuel System Type: EFI
- Gasket Or Seal Included: Yes
- Grade Type: Performance
- Injector Quantity: Single
- Inlet Location: Top
- Intake Port Gasket(s) Included: No
- Manifold Type: Lo-Ram
- Material: Aluminum
- Nitrous Bung(s) Included: No
- Part Type: Engine Intake Manifold
- Plenum Finish: Natural
- Product Type: Intake Manifold Base
- Recommended Use: Forced Induction
- Removable Runners: No
- RPM Power Band: 3500-8000 RPM
- Single Or Dual Plane Type: Single Plane
- Sub Category: Cylinder Block Components
- Throttle Body Included: No
- Warranty: Limited 90 Day
Tech Resources:
Hurry Up! Only 60 items left in stock!
Copy link:
Share:
Ask a question
Shipping
We strive to provide fast and reliable shipping options for all our customers. For detailed information about our shipping rates, delivery times, and policies, please visit our Shipping Page.
Return Policies
Your satisfaction is important to us. If you wish to return an item or request a refund, please review the terms and conditions outlined in our Returns Policy.
Important Notices
- Off‑Road Use Only
Products sold by JS Speed are intended for off‑road use and may be illegal on public roads where emissions or pollution‑control laws apply. - Check Local Laws
Before purchasing or installing, verify all applicable local, state/provincial, and federal regulations to ensure the modification is legal in your area. - Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
