The Holley LS1/2/6 Ultra 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 or aftermarket cylinder heads. The 300-602 is the lower manifold in the 300-621 complete kit. Offering this separately allows you to select your components individually as you build your system. The Ultra 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.
Specifications:
| Description_DEF |
Engine Intake Manifold |
| Description_DES |
Base Manifold and Rail Kit for Ultra Lo-Ram 300-621 - GM LS1/LS2/LS6 |
| Description_EXT |
Holley EFI Lo-Ram Intake Manifold Base; Lower; w/Fuel Rails; Silver; For Use w/PN[300-621]/GM LS1/LS2/LS3; |
| Description_SHO |
Intake Manifold |
| Description_MKT |
The Holley LS1/2/6 Ultra 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 or aftermarket cylinder heads. The 300-602 is the lower manifold in the 300-621 complete kit. Offering this separately allows you to select your components individually as you build your system. The Ultra 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. |
| Description_FAB |
Base manifold and rail kit for Low-Ram 300-621 allows you to select your components individually as you build your intake system |
| Description_FAB |
Designed for GM LS Gen III and IV engines equipped with GM LS1/2/6 (cathedral port) cylinder heads |
| Description_FAB |
Designed for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm depending on the application |
| Description_FAB |
Intake design facilitates custom inlet duct and throttle body placement |
| Description_FAB |
Low height to fit under a stock or mildly modified hood in the front-feed configuration |
| Description_FAB |
Front entry plenum flange allows design & fabrication of special throttle body adapters or inlet ducts for custom installations |
| Description_FAB |
Clears 1998-2002 (4th Gen) Camaro/Firebird and 1997-2004 (C5) Corvette cowls and hoods without modification |
| Description_FAB |
High volume fuel rails and mounting hardware included with ┬╛"-16 o-ring ports (8 AN) |
| Description_FAB |
Manifold base can be used with 300-604 lid and the 300-606 throttle body adapter |
| Description_INV |
BASE IM & FUEL RAILS, LS1 LO-RAM, S |
| Position |
Lower |
| Usage |
Street/Hi-Performance |
| Inlet Location |
Front |
| RPM Range |
7000-8000 |
| Emission Code |
3 |
| Discount Percentage |
5-25% |
| Engine |
GM LS1/LS2/LS6 |
| Finish |
Silver |
| Fuel System Type |
EFI |
| Manifold Type |
Ultra Lo-Ram |
| Recommended Use |
Forced Induction |
| WARNING CA Proposition 65 |
No |
| Number of Carbs |
None; For Fuel Injection |
| Engine Make/Size |
LS Engines |
| Brand |
Holley EFI |
| Clearance Category |
Air and Fuel Delivery |
| Color |
Silver |
| Construction |
Cast |
| Injector Quantity |
Single |
| Product Type |
Intake Manifold Base |
| RPM Power Band |
3500-8000 RPM |
| Sale Category |
Air and Fuel Delivery |
| Warranty |
Limited 90 Day |
| Length |
7.1000 |
| Width |
14.7000 |
| Height |
19.8000 |
| Weight |
16.9000 |
