Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 5 - Jul 10
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Holley Single Plane EFI Intake - GM LS1/LS2/LS6 - 300-137Overview: Single Plane EFI LS Intake Manifold. All GM LS Gen III or IV engines equipped with LS1 LS2 LS6 style cathedral port cylinder heads. Features: 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
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.
Features:
- 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 | 3 |
| Engine | GM Small Block Gen III/IV (LS Based) |
| Finish | Satin |
| Flange Style | 4150 Square Bore |
| 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
4.8 ★★★★★
Based on 571 reviews
Sort
Product Reviews
★★★★★ 5
Love the flavor in my coffee.
Flavor Name: Vanilla
This taste so good and adds delightful flavor to my coffee. I love the pump on the bottle. I love the size of the bottle. It is a great price and quality all the way around. It mixes very well with my coffee. It lasts well, since you don't need much. I love the syrup, it is not watery.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 13, 2026
★★★★★ 5
Vanilla Syrup
Flavor Name: Vanilla
So tasty. Put in my ice coffee and it is perfect. Large bottle but just the right size for me using it daily. Highly recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
★★★★★ 5
Wonderful for London Fogs
Flavor Name: Vanilla
This was a really good-tasting product! I personally use it to make London fogs, and it is perfect for this goal of mine. I do think the pump doesn't spray the syrup as "laminar" as I would like, which causes it to splash onto the table around my mug, but it's still a solid product despite this issue.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
★★★★★ 5
Will always make coffee with this
Flavor Name: Vanilla
This is the key to a good coffee! I do 3-4 pumps and my coffee is sweet & tasty. Bottle is large and will last a while as I don’t make coffee daily. The pump makes life so much easier. Great taste, highly recommend :)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026
★★★★★ 5
Perfect
Flavor Name: Vanilla
I got this vanilla syrup for my wedding to use at a soda bar, and it was such a hit! Everyone loved it. The flavor is amazing—smooth, sweet, and really rich without tasting artificial. It added the perfect cozy touch to the drinks and worked so well with everything on the menu. I’m so glad I chose this one, it tasted incredible and made everything feel extra special!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026