Holley Single Plane EFI 4500 Split-Design Race Intake Manifold 300-294BK
SKU: 67223749784

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

Sale price$382.48 Regular price$424.98
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Description

Holley Single Plane EFI 4500 Split-Design Race Intake Manifold 300-294BKOverview: 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 Black
Construction Cast
Emission Code 3
Engine GM LS1/LS2/LS6
Finish Black
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: 67223749784

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4.1 ★★★★★
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Fred R
West Palm Beach, US
★★★★★ 5
I've loved these - great value and performance
Style: Standard, Color: Black
I purchased these almost three years ago, and I've taken them out on runs several times a week since then. I've been very satisfied with the ease of use (I've had no trouble at all connecting to my two Android phones and my Mac), sound quality, and battery life. I thought to put up a review today because one of the over-the-ear loops broke after 34 months of use. I've superglued it and will see how it lasts, but, at this price point, I've gotten more than my money's worth, and I'm ready to buy another pair if the ones I have are done.
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Reviewed in the United States on May 17, 2026
C
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Coco Donatella
Waukegan, US
★★★★★ 5
Cool, Compact and Convenient !
Style: Standard, Color: Olive
I really love these PocBuds earbuds...they sound robust and the case is a charging case which is very convenient and compact. I love that I can wear just one at a time while the other stays charged. That way I can listen to my music or podcasts while I walk or cook. The color is a rich, camo green which is one of my favorite color shades of green. I highly recommend and God bless❣️ John 3:16
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Reviewed in the United States on April 29, 2026
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Sage
Natrona Heights, US
★★★★★ 4
Good Product But May Not Be For Everyone
Style: Standard, Color: Olive
The look exactly as pictured and described and they’re very nice. Even the small buds feel a bit big for my ears but they fit snug enough to not have to worry about them falling out. They’re relatively comfortable but I haven’t had a change to wear them for long. Either way they seem very much able to stay in your ears. There’s not a lot of adjustability to the ear cuff portion and if you have long hair it’s harder to get them in and they get caught and they to go through your hair. It took me some getting used to on how to put them comfortably but once they’re in they’re very secure. They along with their charging case charge fast and hold charge well. The display telling you percentage is great and the controls seem to be very easy. They’re not great for noise cancelling but I knew that before purchasing because I read the other reviews. Honestly it’s not like you can hear EVEURHING especially if the audio is on but that’s great, especially if you end up using them in public because you’ll be able to pay closer attention to your surroundings. It may not be good if you can’t focus with bleed through noise but just about everything has its trade offs. Overall it’s a very nice product ESPECIALLY for the price. I don’t like scanning QR codes personally so I haven’t registered yet but they do also include a 5 year extended warranty if you feel so inclined.
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Reviewed in the United States on May 16, 2026
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Doctor Spin
Cuba, US
★★★★★ 5
Excellent blazer!
Size: X-Large, Color: Dark Grey
Very nice fabric. Comfortable throughout chest arms and waist. Very nice shade of grey that goes with everything! Fit was perfect. It claims to be washable but I prefer dry cleaning. All Stitching is hidden and it is fully lined. I wear blazers daily for work and this one is great especially for the price.
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Reviewed in the United States on April 6, 2026
M
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MiniKa
Omaha, US
★★★★★ 5
Perfect fit for a medium build 5ft 6
Size: Medium, Color: Light Grey
I am happy with this grey color Blazer. The fit is spot on- I am 5’6” medium build, and it fits comfortably without feeling too tight or too loose. The material feels high quality and has a nice weight into it. Making it look more premium than expected. It’s also very comfortable to wear for extended periods, whether for work or going out. Overall great value and a solid addition to my wardrobe. Would definitely recommend!
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Reviewed in the United States on May 14, 2026

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