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Ships within 48 hours · Estimated delivery Jul 20 - Jul 25
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Description
Holley Hi-Ram Lower Manifold - GM LT1 - 300-237Overview: 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
Overview:
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
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| Universal |
Specs:
| Brand | Holley EFI |
|---|---|
| Construction | Cast |
| Emission Code | 3 |
| Engine | GM Gen V LT1 |
| Finish | Satin |
| Manifold Type | Hi-Ram |
| Product Type | Intake Manifold |
| RPM Power Band | 3500-8000+ |
| Type of Component | Lower Manifold |
| Warranty | Limited 90 Day |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 5
Great purchase!
Color: 1 Gray, Size: California King
I am really happy with this mattress protector! It fit my mattress perfectly and was easy to put on without constantly slipping around. The material feels soft and comfortable, not stiff or plasticky like some waterproof protectors. I also like that it doesn’t make any crinkling noises when moving around in bed. It gives me peace of mind knowing my mattress is protected while still feeling breathable and comfortable to sleep on. Overall, great quality for the price and I would definitely buy it again.
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Reviewed in the United States on May 15, 2026
★★★★★ 5
Utopia bedding is GREAT
Color: White, Size: Full
I had never heard of Utopia before I suddenly needed to buy bedding for my adult autistic son. He has sensory issues so shopping for anything that touches his body is a bit of a nightmare. I took a gamble on these sheets but it paid off big time! He says they are the most comfortable sheets he has ever slept on and that he doesn't overheat sleeping in them. What I liked about them is that the pockets were deep enough that it fit on his oversized plush mattress easily. I love the color and the ones I bought were very true to the picture. These are soft, comfy, they look nice and they are affordable. I liked this brand so much that I went ahead and got pillows and a comforter from them as well. Its is great for my son and I am very pleased to have found a fabric he tolerates.
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Wonderful sheet set
Color: Grey, Size: California King
A very beautiful sheet set at an excellent price—the material is soft and comfortable! I loved the color!!!
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Perfect Fit and Great Quality Sheet Set (10/10)
Color: Grey, Size: King, Color: Grey, Size: King
⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐ (10/10)
This bedsheet has been working flawlessly and honestly exceeded my expectations.
The fit is perfect on the mattress—it wraps securely without slipping or coming loose during the night. It stays in place even after movement, which makes a big difference in comfort and convenience.
The fabric feels soft, comfortable, and well-made, giving a clean and fresh look to the bed. It’s also very easy to put on and remove, which makes washing and changing sheets much simpler.
So far, there are absolutely no issues at all. Everything works exactly as it should, and it holds up really well with daily use.
Overall, it’s a simple but high-quality product that does its job perfectly. I would definitely recommend it—10/10.
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Reviewed in the United States on May 10, 2026
★★★★★ 4
super comfortable, not waking up as often as before
Color: Grey, Size: Queen
decided to try these after seeing the tons of good reviews and since they were on sale. also one of my favorite colors in general which is a great neutral shade for bedding, not too bright and not too dull. I ordered a queen thinking my mattress might have been a queen as I previously bought some mainstays walmart sheets. with that brand the fitted sheet in full was way too small. turns out my mattress is in fact a full it is just that mainstays is not good quality or sized right, so this brand the queen is a bit big for my mattress but not too big of a deal. i am not looking for a perfect look, just covering the mattress is the most important.
anyway since getting these sheets in the mail and giving them a run through the wash and dry before putting them on my bed my sleep quality has improved. the sheets are not too hot, are soft and I actually do not wake up as often as before. the sheets are not too thin like other brands and are not thick like flannel either. they are a nice in between. I wonder if they will help keep me cool in the summer, probably since they are actually breathable. I would definitely reccommend giving these sheets a try, worth the money and a good deal on sale. better quality that other store bought sheets.
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Reviewed in the United States on March 16, 2026