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 manifolds will work with OE or aftermarket cylinder heads. 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. The 300-621 Ultra 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_ASC |
Lo-Ram Base Intake Manifold Plenum Top Mounting Flange Height - 5.17"
Front Feed Plenum Configuration w/105mm Throttle Body Adapter - 6.86" |
Description_DEF |
Engine Intake Manifold |
Description_DES |
Holley Modular Ultra Lo-Ram EFI Manifold LS1/2/6 |
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 |
With forced-induction and the short runner length the engine rpm at which peak power occurs is more likely to be coupled to the supercharger or turbocharger being used |
Description_FAB |
Modular design allowing the use of front-feed plenum entry |
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. |
Description_FAB |
Front entry plenum flange allows design & fabrication of special throttle body adapters or inlet ducts for custom installations |
Description_FAB |
Clears 4th Gen Camaro and 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_EXT |
Holley EFI Modular Lo-Ram Intake Manifold; Upper; Front Feed Cast Black; 6.86 in. Height w/Throttle Body Adapter; For Use w/GM/LS1/LS2/LS6; |
Description_INV |
Lo-Ram Manifold Kit - LS1/2/6 Front-feed |
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 manifolds will work with OE or aftermarket cylinder heads. 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. The 300-621 Ultra 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. |
Engine Make/Size |
GM LS1/LS2/LS6 |
Injector Quantity |
Single |
Product Type |
Intake Manifold |
Sale Category |
Air and Fuel Delivery |
WARNING CA Proposition 65 |
No |
Flange Style |
EFI |
Fuel System Type |
EFI |
RPM Power Band |
3500-8000 RPM |
RPM Range |
7000-8000 |
Number of Carbs |
None; For Fuel Injection |
Construction |
Cast |
Front Height |
6.86" height with throttle body adapter |
Manifold Type |
Ultra Lo-Ram |
Warranty |
Limited 90 Day |
Color |
Black |
Usage |
Street/Hi-Performance |
Position |
Upper |
Emission Code |
3 |
Finish |
Black |
Inlet Location |
Front |
Recommended Use |
Forced Induction |
Brand |
Holley EFI |
Engine |
GM LS1/LS2/LS6 |
Length |
16.0000 |
Width |
15.0000 |
Height |
20.0000 |
Weight |
31.0000 |