Holley – Hi Ram Intake Manifold 92mm Longitudinal Mount w/o Port EFI Provision Gen V LT1 (300-143)
$1,117.95
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- Designed for GM Gen V LT1 engines
- Compatible with OE or aftermarket heads
- Supports 427-440 cubic inch displacement
- Max engine speeds of 7500-8500 rpm
- Requires modified hood for most vehicles
Product Documents
Instructions
Ships from manufacturer
This item ships directly from the manufacturer. If your order is urgent, please reach out to determine the specific lead time.
Description
The new Holley EFI Hi-Ram intake provides the ultimate performance with the new GM direct injected Gen V 6.2L LT1 engine. The modular design of this manifold allows easy disassembly for custom porting, multiple tops, or custom induction systems. Each runner has a large radius where it meets the plenum, and optimized taper & cross-sectional area to perform in a wide variety of engine configurations. The optional injector bosses on the intake runners allow increased performance potential by using additional injectors along with the factory direct injection. When you look for the pinnacle of performance, price, and quality, look to Holley EFI.
Features:
- Modular Design w/ Removable Top
- Overall Height: 13.34” (w/ EFI Top – 95mm or 105mm) – See Drawing
- A-B Height: 12.10” (w/ Carb Style Top – 2 x 4150 or 2 x 4500) – See Drawing
- Height at Plenum Flange: 9.44”
- Port Size: 2.06” High x 1.53” Wide
- Runner Length: Approx. 6.5”
- Large Plenum Volume of 549 Cubic Inches (w/ 1 x 95mm or 1 x 105mm Throttle Body Top)
- Available With or Without Injector Ports in the Runners
- Intakes w/ Injector Ports Include Fuel Rails w/ Dual Mounting (1.48” or 2.56” O-ring to O-ring injector length)
- Fuel Rails are Anodized, Laser Etched, and Machined for 8AN O-Ring Fittings at Each End
- Rear of Plenum Machined for MAP & 3 Vacuum Ports
- Head Flange has Clearance for Fuel Supply to High Pressure Pump
- Increased Runner Wall Thickness for Custom Porting at the Plenum to Runner Entry on Each Runner
- O-Ring Seals at Cylinder Heads & Plenum Top
- Easy Assembly w/ Top Mounted Screws on Plenum Top (all except front 2 screws)
- Several Top Options: 1 x 95mm, 1 x 105mm, 2 x 4150, 2 x 4500, or Blank Flange for Custom Throttle Bodies
- 3500-8000+ RPM Power Band
Questions & Answers (13)
Customer questions & answers
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I have a 2019 Camaro ss, will the stock lt1 throttle body work on this intake
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Q I have a 2019 Camaro ss, will the stock lt1 throttle body work on this intake answer nowAsked by on April 23, 2025 9:50 pmA Yes it should
Does the Katech 103mm TB fit directly on the 92mm Hi-Ram or an adapter has to be used?
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Q Does the Katech 103mm TB fit directly on the 92mm Hi-Ram or an adapter has to be used? answer nowAsked by on November 18, 2024 12:51 pmA You would need some sort of adapter if somebody did offer one I'm unaware
Will this fit under the hood of a 2018 Camaro SS
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Q Will this fit under the hood of a 2018 Camaro SS answer nowAsked by on September 19, 2024 7:58 amA No it will not
Attempting to use my ZR1 95mm TB with this 92mm holley...do I still need the adapter plate or do i just need to need to have some holes slotted.
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Q Attempting to use my ZR1 95mm TB with this 92mm holley...do I still need the adapter plate or do ...... Read more answer nowAsked by on July 13, 2023 2:24 pmA You can do either. Either slot the holes in the TB or use the adapter.
How much power would this pick up on a fbo set up with e85 and stock cam?
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Q How much power would this pick up on a fbo set up with e85 and stock cam? answer nowAsked by on June 26, 2022 8:35 pmA Won't pick up much on a fbo stock cam since stock cam will only rev to 6600 whereas hi ram will support more air flow at rpm higher than that, I would suggest msd
What’s the difference between the 95mm & 105mm ? Which is the best to run the 95mm or the 105 mm ?
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Q What’s the difference between the 95mm & 105mm ? Which is the best to run the 95mm or the 105...... Read more answer nowAsked by on April 10, 2022 10:57 pmA The opening for the throttle body and 105
Do you need cut hood to make it fit on a 2018 GMC Sierra 6.2 ?
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Q Do you need cut hood to make it fit on a 2018 GMC Sierra 6.2 ? answer nowAsked by on September 2, 2021 3:45 amA We haven't installed one of these on the newer trucks so I'm unsure but I wouldn't imagine you'd have to
Will the stock l86 throttle body work on this till I upgrade later
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Q Will the stock l86 throttle body work on this till I upgrade later answer nowAsked by on May 5, 2021 12:44 amA It will indeed work with the stock
can i still use the stock fuel injectors and rails?
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A Yes, you don't change anything with this manifold
Will this intake work with factory gen v lt1 throttle body? If not, what’s recommended? N/A with ss3 cam
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Q Will this intake work with factory gen v lt1 throttle body? If not, what’s recommended? N/A with ...... Read more answer nowAsked by on April 5, 2021 9:14 amA We recommend running the Katech 103mm TB with this application
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Great product fast shipping
Best deal by over $100 and I searched Hard!!!
Ordered the Hi Ram and it was here within a week! Got it installed and ready to hit the dyno on the 5th. Will always purchase through GPI when I need something!