Description
Holley EFI - 300-604
Plenum top for Ultra Lo-Ram 300-621
Holley EFI Lo-Ram Plenum; Front Feed; Satin Finish; For Use w/PN[300-621]/GM LS1/LS2/LS3;
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 300-604 is the plenum top in the 300-621 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 lower overall height to fit under a stock or mildly modified hood. The 300-621 Lo-Ram 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.
- Designed for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm depending on the application
- Clears 1998-2002 (4th Gen) Camaro/Firebird and 1997-2004 (C5) Corvette cowls and hoods without modification
- High volume fuel rails and mounting hardware included with ¾”-16 o-ring ports (8 AN)
- Front entry plenum flange allows design & fabrication of special throttle body adapters or inlet ducts for custom installations
- Designed for GM LS Gen III and IV engines equipped with GM LS1/2/6 (cathedral port) cylinder heads
- Low height to fit under a stock or mildly modified hood.
- Intake design facilitates custom inlet duct and throttle body placement
- Individual plenum top for 300-621 allows you to select your components individually as you build your intake system
- Modular design allowing the use of the included front plenum entry
