SKU: 83380146899

Holley Single Plane EFI Split-Design Intake Manifold GM LS1/LS2 Black 300-255BK

Sale price$314.98 Regular price$349.98
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Description

Holley Single Plane EFI Split-Design Intake Manifold GM LS1/LS2 Black 300-255BKOverview: 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 Black
Construction Cast
Emission Code 3
Engine GM LS1/LS2/LS6
Finish Black
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.
  • 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: 83380146899

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M
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MM
Lowell, US
★★★★★ 5
The perfect wrist rest. Stop looking, just buy this one!
Color: Onyx, Size: Tenkeyless/TKL Keyboard Wrist Rest, Color: Onyx, Size: Tenkeyless/TKL Keyboard Wrist Rest
The perfect wrist rest. I used those gel and silicone wrist rests thinking the softer they are the better. Not so. This is solid hardwood and my wrists no longer ache after a long day at the computer. The size I picked is perfect for a TKL keyboard. The angles, height, and design are optimal for a comfortable typing experience. Even 8-10 hours of typing! I love Glorious' products, they come so well packaged and attention to every detail is given. Gosh, its just a wrist rest! No, it is a tool that provides comfortable work experience.
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Reviewed in the United States on September 4, 2025
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Verified Purchase
Xie Xie
Alexandria, US
★★★★★ 5
The wood is great.
I used to use a typical padded wrist pad, but am a heavy sweater. Upon reading another review in regards to that matter I decided to take the plunge on this rest. I have been a user of the Model O mouse from Glorious for a while and liked it so I trusted the company's reputation for taking gamers' needs into consideration. After using it for about a week and playing different types of games/working from home on it, I can say that although your sweat might pool during sweaty moments, it's easy to wipe off and doesn't seem to easily absorb into the wood. The wood itself is of a nice quality, I like the oak over the onyx for a more "real wood" look. There was no difference in comfort for me, you'd think being used to a padded wrist this shift would be "hard" on me, but no, I haven't had any problems. It's ergonomics for typing are also good as I notice my WPM and consistency be higher on multiple tests. All-in-all quite satisfied with the purchase, fits the aesthetic, feel, and ergonomics I was looking for.
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Reviewed in the United States on March 2, 2021
C
Verified Purchase
C N Rosa
Whiting, US
★★★★★ 5
Very well made, matches width of Keychron Q6 perfectly, great for bigger hands!
This is a nicely finished slab of wood that is an EXACT match for my Keychron Q6 in both width and height. Depthwise, this is 4", so if you got larger hands (as I do), this is a bit better than the silicone Keychron version which I believe is 3.5" or so in depth. The non-stick feet are a nice feature, and the profile is wonderful to type on. Only issue with the item I received is a small nick right below the Glorious emblem on the lower right of the wrist rest - may have been an errant tool mark. However, this doesn't detract in my own opinion, from the well-designed profile and features of this wrist rest and was easily covered with a furniture marking pen. I'm still giving this item 5-stars and getting another one for the office!
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Reviewed in the United States on May 7, 2025
J
Verified Purchase
Jesús Jaén
Battle Creek, US
★★★★★ 4
Glorious Wooden Palm Rest Durability and Stability in an Elegant Design
Color: Onyx, Size: Mouse Wrist Rest, Color: Onyx, Size: Mouse Wrist Rest
After years of using foam palm rests, I always encountered the same problem: they deformed over time, losing height, ergonomics and, consequently, their usefulness. This is especially critical when you spend between 3 and 8 hours a day at the PC for work, study or gaming, since a bad posture can increase the risk of suffering from carpal tunnel syndrome. This is where Glorious' wooden palm rests come in, a solution that eliminates deformations and offers an ideal height for both the mouse version and the TKL (Tenkeyless) version. Positive points • Solid and durable construction: Unlike foam, wood maintains its shape and provides stable support over time. • Elegant and minimalist design: Its finish gives a premium touch to any setup. • Effective non-slip base: The bottom rubbers prevent unwanted movements, providing total stability. • Easy maintenance: Although wood is slightly porous and can retain natural oils or residue from creams and perfumes, cleaning it is easy. Areas for improvement • Less softness than foam: Although still comfortable, wood sacrifices some of the cushioned feel that some prefer. A redesign with a foam strip on top could improve this. • Inconsistent finish between versions: I bought the mouse rest and the TKL at the same time, but noticed that the color tones were different (one blacker than the other). It doesn't affect functionality, but it does affect aesthetics. If you're looking for durability, stability, and a sophisticated design, this is a highly recommended palm rest, especially if you find it on sale. Although it's not as soft as the foam ones, it does its job of providing ergonomic support exceptionally well. An excellent complement for those who spend long hours at the PC and are looking for a sturdier alternative to traditional palm rests.
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Reviewed in the United States on February 5, 2025
M
Verified Purchase
M. Blank
Waukegan, US
★★★★★ 5
great mouse rest
Color: Golden Oak, Size: Mouse Wrist Rest
This works really well for for elevating your wrist, I use an apple trackpad it puts my wrist a little too high so what I did was put some rubber pads on the back of my trackpad to raise it up. It now gives the perfect height and good support I can even lean on it. It works well to the fact that it gives you very good support it's not uncomfortable and it's very easy to clean and looks very nice on my desk, because it's made out of real wood.
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Reviewed in the United States on March 13, 2022

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