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 |
