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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
4.5 ★★★★★
Based on 7 reviews
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Product Reviews
★★★★★ 5
Nice couch for the price
Color: Black, Size: 7 Seat, Color: Black, Size: 7 Seat
Nice and firm I was able to put it up by myself in about three hours. It is really cute The material is soft. I really like it. It was super easy to put together. It came in 4 different boxes, I was worried because people said they got the boxes on different days luckily, I got the whole couch the same day and put together that night. I’m happy with this purchase. Can’t wait to sit on it and watch TV. I just wanna give it a few days to let the seat cushions recover.
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Reviewed in the United States on May 24, 2026
★★★★★ 5
Love the storage and pull-out
Color: Dark Grey, Size: 7 Seat, Color: Dark Grey, Size: 7 Seat
The size is great and fits nicely in the corner without feeling too bulky, but still has plenty of seating. The dark grey color looks clean in person and matches my space really well — not too light, not too dark.
The pull-out part is honestly one of my favorite features. It slides out pretty smoothly and turns into a big lounging area or bed. I’ve already used it to relax and watch TV and it’s really comfortable. The storage compartment is also bigger than I expected — I can fit blankets and a few extra things in there easily, which helps keep everything more organized.
Comfort-wise, I’d say it’s medium-firm. Not super soft like a cloud couch, but still comfortable enough for everyday use. The cushions seem to hold their shape pretty well so far.
Assembly took a bit of time and it’s easier with two people, but overall it wasn’t too complicated. Once it’s set up, it feels pretty sturdy.
If I had to nitpick, the cushions do shift a little after sitting for a while, so you may need to adjust them occasionally. But for the price, I think that’s pretty normal.
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Reviewed in the United States on April 29, 2026
★★★★★ 4
very nice for the money
Color: Dark Grey, Size: 5 Seat, Color: Dark Grey, Size: 5 Seat
Very comfy. The color is perfect. The back pillows do shift when leaning against them but a throw pillow or two helps comfort. The material is soft. And it was fairly easy to assemble with 2 people.
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Fast, Easy and Value for Money
Fast and Easy. Value for money. Highly recommended
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Reviewed in the United States on May 5, 2026
★★★★★ 5
quick response.
Good experience.
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Reviewed in the United States on April 6, 2026