SKU: 54730093715

Holley Single Plane EFI 4500 Split-Design Race Intake Manifold 300-294

Sale price$269.98 Regular price$299.98
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Ships within 48 hours · Estimated delivery Jul 15 - Jul 20

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Description

Holley Single Plane EFI 4500 Split-Design Race Intake Manifold 300-294Overview: The new Holley Single Plane Race intake manifold is designed with maximum performance in mind. Featured is a two piece split design that provides access for all levels of porting and modification. With shoulder bolt locators and O ring seal, disassembly & reassembly is simple and precise. The manifold with AN 8 fuel rails fits GM LS Gen III engines with cathedral port heads and has a 4500 Dominator style carb flange for carburetors, EFI

Overview:

The new Holley Single-Plane Race intake manifold is designed with maximum performance in mind. Featured is a two-piece split design that provides access for all levels of porting and modification. With shoulder bolt locators and O-ring seal, disassembly & reassembly is simple and precise. The manifold with AN-8 fuel rails fits GM LS Gen III engines with cathedral port heads and has a 4500 Dominator style carb flange for carburetors, EFI throttle bodies, or EFI throttle body elbows, and is configured with a LS MAP sensor port along with other NPT plenum vacuum or air-temp sensor ports. The LS Race single-plane intake manifold is designed for hi-performance/racing engine applications, 5.3 to 6.2+ liter displacements, N/A or with power adders. The large volume 4500 plenum and optimized runners provide airflow potential for Hi-RPM engines with max power at 7500-8000+ RPM.

Features:

  • Maximum performance 4500 Dominator flange 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 plenum split
  • Vacuum Port options include (2) 1/8, (1) 1/4, and (1) 3/8, NPT ports at the carb flange
  • Two versions available: EFI type - Billet Fuel Rails and rail mounting hardware included, or Carbureted / Sniper EFI 4500 TBI style

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 4500
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: 54730093715

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4.5 ★★★★★
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Green cam
Belleville, US
★★★★★ 5
Fizzing fiber drink
This is a great tasting fiber drink, plus added vitamins..
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 10, 2026
L
Verified Purchase
LC
Cuba, US
★★★★★ 5
Best one yet
Best tasting Metamucil if you enjoy carbonation. Less sweet than regular (even the no added sugar version felt a bit overly sweet to me). Lemonade is a close second but a bit too expensive. Wish it would come with a scoop but I saved one from a different product and dropped it into the jar here.
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Reviewed in the United States on January 25, 2026
L
Verified Purchase
Lucky
Draper, US
★★★★★ 3
Great product, dislike new 43oz size
Works well. Prefer the “fizzy” formula over all others. I recommend adding powder to your cup, fill 30-50% with cold water, then use a small handheld milk frother to blend. It’ll “foam” then settle, add you can add more water. (If you fill the whole cup with water right away it’ll overflow when it foams up.) I prefer to drink it quickly, before it starts to thicken into a heavy gel/paste. 3 star rating for 2 reasons: 1) Strongly dislike the food coloring! 2) They recently changed container size and shape. It used to be a 29oz cylinder, now it’s 43oz and more like a tub. The new format is too large for my kitchen vitamin drawer + too wide and heavy to grab with one hand. (I’ve included side by side pics here - didn’t think to take them until I’d already removed the 43oz label for recycling.) I saved my last 29oz canister and I’ve been decanting powder from the 43oz, keeping the 43oz in pantry storage.
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Reviewed in the United States on March 26, 2026
T
Verified Purchase
Tereca
New York, US
★★★★★ 5
Great product
I have been using Metamucil for a long time! I can tell a difference in using the plain and the vitamin variety. I feel a more energetic. I will not use this variety close to bedtime. It does fizz a lot. Only add a small amount of water to the glass and after the fizz settles down add more water. Great product!
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Reviewed in the United States on January 22, 2026
K
Verified Purchase
Kiri
Belleville, US
★★★★★ 5
Fantastic product, dont like the texture - mix with food. Still 10/10 💩🎉
Flavor Name: Orange, Size: 15 Ounce (Pack of 1)
Taste: While the product doesn’t taste bad, preparing it as directed results in a very mild orange flavor. -as a drink I would prefer more flavor. Texture: The psyllium husk absorbs water extremely quickly—even in cold or room-temp water—which is just the nature of the ingredient itself. Because it starts to gel so fast, you have to chug it, and even then it can be difficult to get down. (I personally gag at it, but I have sensory issues) If the gel like texture is an issue for you, I found it more palatable mixed into food with water on the side. Texture aside, the product itself is highly effective. Mixability: It doesn’t always mix smoothly and tends to clump. Again nature of the ingredient not the brand. The powder is very fine and non-gritty perfect for other mixings. Side effects: I had uncomfortable bloating the first time (2 scoops/ full glass), I recommend starting with (1 scoop or less/full glass) Dont rush it. Increase it from there as you grow tolerance. You may feel very full. - it helped me eat less!
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Reviewed in the United States on April 3, 2026

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