SKU: 1143068799

Holley LS EFI Manifold - 2x4 Dual Plane - Black - 300-121BK

Sale price$382.48 Regular price$424.98
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Description

Holley LS EFI Manifold - 2x4 Dual Plane - Black - 300-121BKOverview: Holley EFI 2x4 Dual Plane Intake Manifold, LS Gen 3 LS1 LS2 LS6 engines Features: The Holley GM LS1 LS2 LS6 2x4V dual plane was designed in the tradition of the great dual Holley 4160 induction systems that competed on drag strips, in Trans Am and at Lemans in the 1960s. The technology of the LS pushrod engine is now mated with the im The dual plane equal distribution layout produces great mid range torque without compromising top end power.

Overview:

Holley EFI 2x4 Dual Plane Intake Manifold, LS Gen 3 LS1/LS2/LS6 engines

Features:

  • The Holley GM LS1/LS2/LS6 2x4V dual-plane was designed in the tradition of the great dual Holley 4160 induction systems that competed on drag strips, in Trans-Am and at Lemans in the 1960’s. The technology of the LS pushrod engine is now mated with the im
  • The dual-plane equal-distribution layout produces great mid-range torque without compromising top end power. The LS engine architecture does not utilize an intake mounted water neck or distributor so it’s perfect for two Holley carburetors and this intak
  • Carbureted and EFI versions available
  • Power band from 1500-7000 rpm
  • Appropriate for any street/performance, muscle car, or street rod enthusiast
  • Cast aluminum construction
  • Intended for use on all GM LS Gen III engines equipped with LS1/LS2 style cathedral port cylinder heads
  • Carb Flange Center-To-Center: 8-5/8”

Application:

Year Make Model Submodel Engine Size
Universal

Specs:

Brand Holley EFI
Construction Cast
Emission Code 3
Engine GM Small Block Gen III/IV (LS Based)
Finish Black
Front Height 4.47 inch
Fuel System Type EFI
Manifold Type Dual Plane
Product Type Manifold
Rear Height 5.54 inch
RPM Power Band 1500-7000
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:
  1. 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
SKU: 1143068799

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4.4 ★★★★★
Based on 19 reviews
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Verified Purchase
Joseph Klobuchar
Battle Creek, US
★★★★★ 5
Just lovely
Size: 8.5" x 5.8" x 1.9", Color: Orange
Purchased this several months ago and liked it, but I had received so many complements on this tray since then I had to submit this review. The tray is sturdy and put together well, and the size is exactly what was given before purchase.
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Reviewed in the United States on May 27, 2026
A
Verified Purchase
Amazon Customer
Bozeman, US
★★★★★ 5
Shelves
Size: 12 Inch, Color: Black
High quality, strong and beautiful. I receive alot of compliments
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
L
Verified Purchase
Lily🐝
Port Orchard, US
★★★★★ 5
Fabulous! I’ve purchased these more than once!
Size: 12 Inch, Color: Gold, Size: 12 Inch, Color: Gold
These are beautiful and the perfect size for the 12” wide boards I use. The lumber isn’t cut to exactly 12” so there is a slight gap in the back towards the wall which I like for cords, and the boards stay in place with bottom screws. These are very sturdy, thick, and solid. I have not had a single problem with any of them. They are easy to install and very functional. Definitely worth the cost. I have purchased a couple of times.
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Reviewed in the United States on December 28, 2024
M
Verified Purchase
M.J.
Belleville, US
★★★★★ 5
Excellent shelf brackets.
Size: 12 Inch, Color: Black
Perfect exactly as advertised. Correct measurement at 12 inches. Product supplies All the screw for mounting. High quality and very sturdy. Used in my pantry. No instructions but don’t really need.
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Reviewed in the United States on January 7, 2026
M
Verified Purchase
michael borton
Massapequa, US
★★★★★ 5
Quality and great looking for everything.
Size: 10 Inch, Color: Black
Easy to use , and works and looks great in the garage.
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Reviewed in the United States on March 14, 2026

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