SKU: 16588592971

Holley Single Plane Split-Design Race Intake Manifold- GM LS1/LS2/LS6 - 300-256

Sale price$327.58 Regular price$363.98
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Description

Holley Single Plane Split-Design Race Intake Manifold- GM LS1/LS2/LS6 - 300-256Overview: 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 ? Carburetor 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

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 Carb
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.
  • Except Preorder products are shipped in 48 hours.
  • 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.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 16588592971

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Amazon Customer
Lake Worth, US
★★★★★ 4
Holding up well.
Pattern Name: Checkered
Seems to be holding up to my aggressive chewer. I have it hanging from a tree branch and she loves leaping to get it! Buying another pair so she has a greater selection around the backyard.
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Reviewed in the United States on April 3, 2026
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Madisen Busch
Alexandria, US
★★★★★ 5
Good quality
Pattern Name: Checkered
10/10 my dog lovessss and she chews through everything but they last daily tug of war, I don’t let her sit and chew on it thought I only use it outside
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Reviewed in the United States on May 28, 2026
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Moon Face
Bozeman, US
★★★★★ 1
Cheap Never again
Pattern Name: Star, Pattern Name: Star
Cheap product. Returned immediately. My shitzu is over a year & a similar toy from the Dollar Tree lasted longer than 6 months. This item lasted 1 hour of receiving.
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Reviewed in the United States on March 14, 2025
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Georgie Oldham
Lake Worth, US
★★★★★ 3
My doggy no like!
Pattern Name: Star
My dog completely ignored them.
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Reviewed in the United States on April 3, 2026
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Winter in the desert
Louisville, US
★★★★★ 5
Fun toy
Pattern Name: Checkered
This was a very fun toy but didn't last too long with our 1-year-old lab who is an aggressive chewer.
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Reviewed in the United States on April 27, 2026

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