SKU: 50747521139

Holley Single Plane EFI Split-Design Race Intake Manifold GM LS1/LS2/LS6 300-255

Sale price$224.97 Regular price$249.97
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Description

Holley Single Plane EFI Split-Design Race Intake Manifold GM LS1/LS2/LS6 300-255Overview: The new Holley Single Plane Race intake manifold were designed with performance in mind. They feature a race bred, two piece split feature that was previously only found on the most expensive race intakes. The manifold will fit GM LS Gen III engines with cathedral port heads and are intended for 4150 style square bore flanged carburetors or throttle body EFI. The LS Race single plane intake manifold was designed for hi performance racing

Overview:

The new Holley Single-Plane Race intake manifold were designed with performance in mind. They feature a race bred, two piece split feature that was previously only found on the most expensive race intakes. The manifold will fit GM LS Gen III engines with cathedral port heads and are intended for 4150 style square bore flanged carburetors or throttle body EFI. The LS Race single-plane intake manifold was designed for hi-performance/racing engine applications, 5.3 to 6.2+ liter displacement, and maximum engine speeds of 6000-7000 rpm, depending on the engine combination. This single-plane design provides optimal performance across the RPM spectrum while providing maximum performance up to 7000 rpm. The Holley LS Race manifold incorporates a split feature, which allows disassembly of the intake for direct access to internal plenum and port surfaces, making custom porting and matching a snap. With shoulder bolt locators and O-ring seal, reassembly is simple and precise. Technical Data: ? A-B Height - 7.32" (0° carb flange angle) ? Port Size- 3.28" Height x 1.10" Wide ? Throttle Body Flange - Standard 4150 for up to 1-3/4" diameter throttle bores ? As-Cast Runner Cross-Sectional Area - 3.5 in² at the runner entry tapered to 2.9 in² at the flange exit

Features:

  • Maximum performance race design with hood clearance consideration
  • Lighter than other split race intakes
  • Split feature making porting efforts easy!
  • 33 to 50% the price of other split race intakes
  • Captured O-ring seals at head ports and split
  • Vacuum Port options include (2) 1/8, (1) 1/4, and (1) 3/8, NPT ports at the carb flange
  • Billet Fuel Rails and rail mounting hardware included.

Application:

Year Make Model Submodel Engine Size
Universal

Specs:

Barrels 4
Brand Holley
Color Silver
Construction Cast
Emission Code 3
Engine GM LS1/LS2/LS6
Finish Satin
Flange Style 4150 Square Bore
Front Height 7.32"
Fuel System Type EFI
Manifold Type Split Single Plane
Product Type Manifold
Rear Height 7.32"
RPM Power Band 2500-7000
Warranty Limited 90 Day
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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  • Delivery 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.
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SKU: 50747521139

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gigglelish
San Leandro, US
★★★★★ 5
Good
Size: 1 Ounce (Pack of 1)
Feels great and moisturizing.
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Reviewed in the United States on May 26, 2026
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Mo
San Leandro, US
★★★★★ 5
Not an eye cream, but makes a great eye cream
I use this as any eye cream before applying my prescription tretinoin cream. Its provides a good barrier for my sensitive eye area without feeling heavy. Its large so it is a great value for my money. It is light weight, not greasy, unscented, and is great for my sensitive skin. I am prone to millia and haven't had any issues since switching to this for eye cream.
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Brittney Todd
Fort Morgan, US
★★★★★ 5
Everyday light weight face moisturizer
This is the perfect moisturizer! It is light weight and it doesn’t take but a pea size amount so it last forever! This has my skin feeling so moisture and the consistency can’t beat anything. It has the best ingredients and has no fragrance which is perfect for your skin. HIGHLY RECOMMEND
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MelRO
Port Orchard, US
★★★★★ 4
Great product, but received older tube
Prequel is one of my favorite skincare brands, I have always loved this particular product and usually order on the brands official website. But I needed a new tube of this quickly so I ordered here on Amazon. I recieved a tube that expires in only 4 months. I’m not sure if they sell old stock through Amazon or what the issue is. I ordered a tube straight from prequel’s website afterwards and the expiration date isn’t until January of next year. Not a huge deal, but still kind of a bummer. I will not be ordering skincare products from Amazon anymore.
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Reviewed in the United States on April 5, 2026
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Ros
Whiting, US
★★★★★ 5
Love it
My face was so dry it burned when I put my regular moisturizer on it so I got this to help. Within a few days my skin felt amazing, smooth, and not dry. It’s not thick and layers nicely if you want to. Love this stuff!
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Reviewed in the United States on May 15, 2026

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