Air and Fuel› Intake Manifolds and Components
Holley
Lo-Ram Intake Manifold Kit LS1/LS2/LS6 Frt Feed
SKU: H00E 300-621BK
Moderate — 2–4 hours
Description
Part #: 300-621BK
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.
Features:
- Designed for GM LS Gen III and IV engines equipped with GM LS1/2/6 (cathedral port) cylinder heads
- Designed for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm depending on the application.
- 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
- Modular design allowing the use of front-feed plenum entry
- Intake design facilitates custom inlet duct and throttle body placement
- Low height to fit under a stock or mildly modified hood.
- Front entry plenum flange allows design & fabrication of special throttle body adapters or inlet ducts for custom installations
- Clears 4th Gen Camaro and C5 Corvette cowls and hoods without modification
- High volume fuel rails and mounting hardware included with ┬╛"-16 o-ring ports (8 AN)
Ultra Lo-Ram Manifold Kit - LS1/2/6-Black Finish
MIA's Description
Fitment
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Specifications
| Brand | Holley |
| Part Number | H00E 300-621BK |
| Weight | 30.51 lb |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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