Holley – Hi Ram Intake Manifold 105mm Longitudinal Mount w/o Port EFI Provision Gen V LT1 (300-142)
$1,177.95
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GM Gen V LT1 Hi-Ram, 1 x 105mm LS Throttle Body (Longitudinal Mount) w/out Port EFI Provisions
- For GM Gen V LT1 engines
- Compatible with OE or aftermarket heads
- Supports 427-440 cubic inch displacement
- Optimized for 7500-8500 rpm
- Requires modified hood
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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 (25)
Customer questions & answers
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Hello. For the lid what is the torque spec and sequence
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Q Hello. For the lid what is the torque spec and sequence answer nowAsked by on May 14, 2026 2:18 pmA There's not a specific spec but work from the inside towards the outside
What do I do with the cold intake sensor if I go with a v-stack ?
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Q What do I do with the cold intake sensor if I go with a v-stack ? answer nowAsked by on May 4, 2026 9:55 amA You'll still leave it plugged in but it won't have to go into anything just lay on top of the valley cover
Will this fit with a 103 nick willam throttle body
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A Yes
Will this fit a 2019 c7 grand sport
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A You'll have to cut and clearance your wiper cowl and hood but yes it will bolt to your lt1 heads
Hello. Do you have a Turbine C7 Corvette? RPM 4000-4400 torque converter 2019 Corvette Stingray
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Q Hello. Do you have a Turbine C7 Corvette? RPM 4000-4400 torque converter 2019 Corvette StingrayAsked by on August 6, 2025 4:35 pmThere are no answers for this question yet. Answer now
Does it fit a l83
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A This intake will fit the L83, as long as you get the proper 103 TB like the Katech, cannot use stock TB on it.
Do you guys make an adapter for the stock LT1 throttle body if not where can I find one ?
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Q Do you guys make an adapter for the stock LT1 throttle body if not where can I find one ? answer nowAsked by on May 26, 2025 2:22 amA We do not and I'm not sure if anybody offers such a product
I have a Camaro 2019 ss, will the stock throttle body fit the 105 intake for now?
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Q I have a Camaro 2019 ss, will the stock throttle body fit the 105 intake for now? answer nowAsked by on April 24, 2025 11:57 amA I believe it will but may require an adapter
Will a lt5 throttle body fit on it ?
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A Yes it should may need an adapter for bolt pattern difference
does this come with everything to bolt up to a c7 stingray lt1 or will i need more parts to run it?
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Q does this come with everything to bolt up to a c7 stingray lt1 or will i need more parts to run it? answer nowAsked by on December 4, 2024 9:52 pmA You'll need a fitting for the back of the manifold to run to your brake booster you can get at local hardware store
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Loved the product
Awesome product
10/10 would highly recommend
Package very secured
great product , car really made a difference on my H/C/I Set up. 100/10 if you decide to order this thru GPI. when opened it was nicely packaged as well. #TEAMGPI