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Description
Holley Single Plane EFI Intake-GM LS1/LS2/LS6 - Black - 300-137BKOverview: Single Plane EFI LS Intake Manifold. All GM LS Gen III or IV engines equipped with LS1 LS2 LS6 style cathedral port cylinder heads. Black Ceramic Coating to provide you with that aggressive look in your engine compartment. Features: Black ceramic coating provides an aggressive look to your engine compartment 2500 7000 RPM power band 4150 Square bore flange Optimized runner layout and constant cross sectional area broad torque curve, best
Overview:
Single Plane EFI LS Intake Manifold. All GM LS Gen III or IV engines equipped with LS1/LS2/LS6 style cathedral port cylinder heads.
Black Ceramic Coating to provide you with that aggressive look in your engine compartment.
Features:
- Black ceramic coating provides an aggressive look to your engine compartment
- 2500-7000 RPM power band
- 4150 Square bore flange
- Optimized runner layout and constant cross sectional area - broad torque curve, best vehicle performance from 2500-7000 RPM
- Minimum carb flange height - fit in vehicles with minimum hood modifications
- Cast aluminum construction - great manifold for centrifugal blower, turbocharged or NOS power adder applications
- Efficient casting design - lightweight, consistent wall thicknesses, improved casting quality
- Weight - 11.5 lbs.
- Height (front) - 5.417" to the lifter valley cover flange at the engine block front flange
- Port size - 2.50" height x 1.15" wide
- Includes Viton® O-ring intake to cylinder head gaskets - Viton® is a registered trademark of DuPont Performance Elastomers
- Kit does not work with factory fuel rails and requires the use of Holley Fuel Rail Kit P/N 534-219
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| Universal |
Specs:
| Brand | Holley EFI |
|---|---|
| Construction | Cast |
| Emission Code | 4 |
| Engine | GM Small Block Gen III/IV (LS Based) |
| Finish | Black |
| Front Height | 5.417 inch |
| Fuel System Type | EFI |
| Manifold Type | Single Plane |
| Product Type | Manifold |
| Rear Height | 5.417 inch |
| 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:
- 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
4.3 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
Hermoso
Color: Stainless Steel
Muy bello
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2026
★★★★★ 5
Like the best military items: does exactly what it's used for:
Color: Black
Even better than the infantry watch I used in the USAF 50 years ago. It has 12/24 hour time and day/date; other models have additional features. It's rugged and easy to read - a real watch face, NOT digital ! ... AND inexpensive too. BTW it has a real watch band made to be used in the elements (e.g. weather, work).
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Reviewed in the United States on January 27, 2026
★★★★★ 5
Great Everyday Watch
Color: Black
Great product and a great price.
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Infantry 5ATM Waterproof Mens Military Tactical Field Watch, Date & Day 12/24Hr-
Color: Silver
So I almost never write reviews- anywhere. This is an exception & I'm not paid or reimbursed- just impressed.
This watch presents a really good price to value ratio.
My infantry watch looks great and is very functional. I put a NATO strap on it because I tend to be tough with watches, though the one it arrived with is very nice looking and the buckle is even logo'd- a really nice touch in this price segment. I've received several positive compliments while wearing it and 1 of my friends has purchased an Infantry field watch from this same series since.
The company behind the watch is part of the value equation. I had a minor issue and I was able to get in touch with a real person... no, actually two! I contacted via Amazon AND through the support dept from their website. Both inquiries were promptly answered with a helpful and well-mannered reply and the perfect solution.
There are several collections to be found on their website (SEARCH: Infantry Watches ). These watches range in appointment and quality from levels found here to several steps above. Similar in looks and nature to this one on Amazon include; The Chronomaster, The Skeleton, and The Auto-Pilot to name a few.
I've begun to add additional watches to my collection from those. There are also fun and informal collaborations offered. Right now [8-2025] these include; Transformers, Monopoly, Peanuts and several others.
---> Overall it's rare and refreshing to find a company still able to work decent products AND ethics into a successful business model!
Gen0
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Reviewed in the United States on August 13, 2025
★★★★★ 4
Simple, affordable, smartly styled. Good starter watch for teens
Color: Black
Got this for 13-year-old boy for Christmas. Excellent choice for a beginner's watch. Learn to read a clock face for crying out loud! Easy to set the day/date, and has a comfortable band.
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Reviewed in the United States on December 27, 2025