Holley LS Modular Lo-Ram EFI Intake Systems 300-620 Manifolds, Modular, EFI, Cathedral Port Head, Multi-port, Standard Deck, 105mm Bore, Aluminum, Satin Finish, Chevy, 4.8-6.0L, Each
Holley LS Modular Lo-Ram EFI Intake Systems 300-620 Manifolds, Modular, EFI, Cathedral Port Head, Multi-port, Standard Deck, 105mm Bore, Aluminum, Satin Finish, Chevy, 4.8-6.0L, Each
Description
Intake Manifold - Modular Lo-Ram - Multi-Port - Aluminum - Natural - LS1 / LS2 / LS6 - GM LS-Series - Each
Data: v2 - Desc: v4.2 - Upd: 2026-11-08 02:15:24
Features
Note for Australian and European Markets
Unless otherwise stated, this product may be engineered for use in Left-Hand Drive vehicles. Steering components, pedals, shifters, linkages, wing mirrors, instrument clusters, panhard rods/traction bars, drag links, brake boosters, brake or clutch lines, accelerator cables, heater cores, some master cylinders and adjacent parts can vary between LHD and RHD configurations. In some models compenents such as windscreen wiper arms, motors and linkages could differ in their size and orientation. Items such as floor mats & dash mats may have differences in their structure around the front row (or padding in different locations). In many cases items are identical depending on the design of the vehicle and part, but may have differing mounts, lengths or bolt patterns. Carefully review the product images and details to ensure suitability for your vehicle, or contact StreetFX support if you are unsure. Returns are not accepted for special order products.
(keyword: manifolds)Vehicle Compatibility and Return Conditions.
This item was designed and engineered in the USA for US domestic vehicles. OBD tools, ECUs, dongles, programmers, and tuners may have limited compatibility with vehicles outside the USA due to regional differences in emission standards and system configurations. Some features and functionality may vary depending on the vehicle and location.
Some electronic tuning devices and programmers require activation, registration, or pairing with a specific vehicle’s VIN (Vehicle Identification Number). Once activated or paired, these devices may become permanently associated with that vehicle, restricting or preventing their use on another vehicle, resticting our ability to offer returns or exchanges.
Please review the product details and images to ensure it meets your needs. For clarification or assistance, feel free to contact a StreetFX agent. Note: Returns are not accepted for special order or tuning products unless the unit is deemed faulty.
Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.
Specifications
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Holley, Hilborn, Holley Efi, Retrobright, Terminator X |
| StreetFX SKU | hly300-620 |
| SFX Item ID | 4782604 |
| Accounting SKU | hly-300-620 |
| Manufacturer SKU | 300-620 |
| Manufacturer UPC | 090127077542 |
| Alternative References | 300-620, HLY-300-620, HOL300-620 |
Intake Manifolds, LS Modular, Lo-Ram EFI, Cathedral Port Head, Multi-port, Standard Deck, 105mm Bore, Aluminum, Satin Finish, Chevy, 4.8-6.0L, Each
Holley LS Modular Lo-Ram EFI intake systems have a top-feed plenum entry configuration, designed to allow the currently available Hi-Ram 105mm plenum tops to be fitted to a low-profile base intake manifold. The short runner, low-profile base intake manifold intended for forced induction applications and was conceived to package with an air-to-water plenum-mounted intercooler—with a shorter overall height than is possible with other existing intake manifolds. Using a modular design, the top-feed plenum configuration with 105mm top keeps the overall height at just 9.07 in.!
Additional features and specs include:
• Cast aluminum construction
• Modular design allows the use of the included top-feed plenum entry
• Designed for GM LS Gen III and IV engines equipped with GM LS1/LS2/LS6 (cathedral port) cylinder heads
• Will also work with OE or aftermarket cylinder heads
• Designed for forced induction (supercharged or turbocharged) engine applications with peak power at 7,000 to 8,000 rpm, depending on application
• Low height to aid the packaging of a plenum-mounted air-to-water intercooler in a top-feed configuration (or to fit under a stock or mildly modified hood in the front-feed configuration)
• High-volume fuel rails and mounting hardware included with 3/4 in.-16 O-ring ports (8 AN)
• 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
| Product Attributes | |
|---|---|
| Brand | Holley |
| Manufacturer's Part Number | 300-620 |
| Part Type | Intake Manifolds, Fuel Injected |
| Product Line | Holley LS Modular Lo-Ram EFI Intake Systems |
| UPC | 090127077542 |
| Cylinder Head Configuration | Cathedral Port LS1/LS2/LS6 |
| Fuel Injection Style | Multi-port |
| Basic Operating RPM Range | 3,500-8,000 |
| Intake Section Included | Complete |
| Throttle Body Bore Size | 105mm |
| Engine Block Deck Height | Standard deck |
| Injectors Included | No |
| Multi-Port Fuel Rails Included | Yes |
| EGR | No |
| Aftermarket Fuel Rail Required | No |
| Throttle Body Included | No |
| Supplemental Bosses Cast-In | No |
| Supplemental Bosses Machined | No |
| Runners Included | No |
| Runners Removable | No |
| Plenum Material | Aluminum |
| Plenum Finish | Satin |
| Base Material | Aluminum |
| Base Color | Satin |
| Remanufactured | No |
| Quantity | Sold individually. |
Compatibility
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