SKU: 97865352339

Holley Hi-Ram Lower Manifold - GM LS7- Black - 300-229BK

Sale price$427.48 Regular price$474.98
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Description

Holley Hi-Ram Lower Manifold - GM LS7- Black - 300-229BKOverview: The Holley GM LS7 Modular Hi Ram Intake Manifold is introduced as a cost effective alternative to fabricated sheet metal for high performance applications where induction system height is not limited. Coupling this Hi Ram intake with the high flowing LS7 style cylinder heads has outstanding potential for N A and forced induction applications at a budget minded cost. Aggressive, bold, race bred styling will make bad intentions clear for drag

Overview:

The Holley GM LS7 Modular Hi-Ram Intake Manifold is introduced as a cost effective alternative to fabricated sheet-metal for high-performance applications where induction system height is not limited. Coupling this Hi-Ram intake with the high flowing LS7 style cylinder heads has outstanding potential for N/A and forced induction applications at a budget-minded cost. Aggressive, bold, race-bred styling will make bad intentions clear for drag race, muscle car, marine, off-road, sandrails, pulling trucks, track, street-rod applications and more!  The base is designed to be modular in configuration to accept a wide range of carbureted and EFI tops and to be attractive to builders and fabricators as the foundation for custom induction systems.  Runner length and the tapered cross-section designed to perform well for a wide range of engine configurations  EFI fuel rails are machined for -8AN O-ring Fittings with passages large enough to accommodate high fuel flows and dampen pressure pulsations in the fuel system and come standard with EFI Hi-Ram kits.  Cast aluminum construction.  Intended for use on N/A or forced induction engines in the 6.0 to 7.0+ liter range, max power at 7000-8000+RPM.

Features:

  • Port Size – 2.49” Height x 1.21” Wide
  • Mounting Flange Gasket Type – Standard LS3 Molded O-Ring
  • Plenum Top Gasket Type – 3/32” Round O-ring Cord
  • Runner Length – 6.29”, As-Cast Runner Cross-Sectional Area – Tapered 4.67 in² to 2.84 in²

 

Application:

Year Make Model Submodel Engine Size
Universal

 

Specs:

Brand Holley EFI
Color Black
Construction Cast
Emission Code 3
Engine GM LS7
Fuel System Type EFI
Product Type Manifold
Type of Component Lower Manifold
Warranty Limited 90 Day
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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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]
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SKU: 97865352339

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4.8 ★★★★★
Based on 7 reviews
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Product Reviews
B
Verified Purchase
Brian ward
Lowell, US
★★★★★ 5
Easy to use and works great
Size: 1 Gallon + Tool, Set name: Off-Road Formula
Easy to use
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 22, 2026
H
Verified Purchase
Hill
Chelsea, US
★★★★★ 5
Cool stuff
Bought a Swisher rough cut mower to pull behind the Yamaha Rhino to cut our 6 acre field. We were cutting down 8 foot trees, no problem, but one tree had big thorns on it and destroyed the rear tires of the Rhino. Replaced all tires, and since we still have to mow the field I opted for adding this to the tires. Very easy to use, and now I have the confidence that if we get a puncture we will still have air. Also bought their flat fix kit that comes with CO2 cartridges. Brilliant space saving idea! So, haven't had to test this stuff yet, but I'm fairly confident it will work. An added bonus is that it can clean up with water. I've heard stories of tire places not wanting to touch a tire with the other brand that comes in an aerosol can, as it's dangerous and messy. Time will hopefully not tell. It's like insurance - hate to pay for it until you need it, but hope you never do.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 16, 2018
M
Verified Purchase
MARC T
Houston, US
★★★★★ 5
Got me home after a sidewall cut!
I am very happy I bought this tire repair kit earlier this year. I was out riding my UTV today and had a flat tire caused by a sidewall cut. I used the tireject kit and was up and running again pretty quickly and it was more than enough to get me back the the truck and trailer. I bought this kit instead of going with a spare tire. I have already bought more of the fluid to replace what I used today.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 7, 2020
M
Verified Purchase
Merv
Bozeman, US
★★★★★ 5
Amazing sealant and easy to use even in cold weather.
This product is amazing. It poured right into my tire even though it was -8 celcius. It sealed the crack in my aluminum rim and the the leaky tire bead after I hit a rock. Sealed everything and got me back to trailer and it is still holding air.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 18, 2018
N
Verified Purchase
Noba Henderson
Belleville, US
★★★★★ 5
Flat tire… try this.
Size: 1 Gallon + Tool, Set name: Small Tire/Bicycle Formula
For husband, that’s what he puts in our tires great price and works well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026

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