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Description
Lo-Ram Manifold Base and Fuel Rails Single Fuel Injector GM LS3/L93 300-670BKTop feed Single Injector manifold and fuel rails only Black Finish Features: Designed for GM LS Gen III and IV engines equipped with GM LS3 L92 cylinder heads Provides best performance for forced induction (supercharged or turbocharged) engine applications with peak power at 7000 8000 rpm, depending on the application Dual injector, separate passage, high volume fuel rails with mounting hardware, dual fuel capable, 8 AN o ring ports Modular LS3 Lo Ram
Top-feed Single Injector manifold and fuel rails only-Black Finish
Features:
- Designed for GM LS Gen III and IV engines equipped with GM LS3/L92 cylinder heads
- Provides best performance for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm, depending on the application
- Dual-injector, separate-passage, high-volume fuel rails with mounting hardware, dual-fuel capable, 8 AN o-ring ports
- Modular LS3 Lo-Ram design allows customization for user desired configurations
- Modular design allowing the use of the included top-feed plenum entry
- Available with both as-cast satin and black power-coat finishes
- High volume fuel rails for eight and sixteen injector configurations. Mounting hardware included with 3/4-16 O-ring ports (8 AN)and mounting hardware included with 3/4-16 O-ring ports (8 AN)
Specs:
| Basic Operating RPM Range | 3500-8000 RPM |
|---|---|
| Brand | Holley EFI |
| Category Filter | Intake Manifolds |
| Clearance Category | Intake Manifolds |
| Color | Black |
| Construction | Cast |
| EGR Port | No |
| Emission Code | 3 |
| Engine | GM LS3/L92 |
| Finish | Black |
| Fuel System Type | EFI |
| Grade Type | Performance |
| Injector Quantity | Single |
| Inlet Location | Top |
| Intake Port Gasket(s) Included | No |
| Manifold Type | Lo-Ram |
| Material | Aluminum |
| Nitrous Bung(s) Included | No |
| Plenum Finish | Black |
| Product Type | Intake Manifold Base |
| Recommended Use | Forced Induction |
| Removable Runners | No |
| RPM Power Band | 3500-8000 RPM |
| Single Or Dual Plane Type | Single Plane |
| Throttle Body Included | No |
| Warning | California Proposition 65 |
| Warranty | Limited 90 Day |
Application:
| Year | Make | Model | Submodel |
|---|---|---|---|
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 8 reviews
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Product Reviews
★★★★★ 5
Very wrinkle free and sheds off liquids well.
Color: White, Size: X-Large
Very very nice shift. I’m usually XL and that’s what size I purchased and it fits perfectly.
I recently purchased one for my sons 5th grade graduation and the fit and feel was better than the 80.00 and 89.00 shirts I purchased for him at Dillard's, which were
returned.
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Reviewed in the United States on May 31, 2026
★★★★★ 5
Great shirt!
Color: White, Size: X-Large
This shirt is all that! It's beautiful and feels soft yet very stable fabric. White is always somewhat see through but this one isn't bad, unless you wore black under it.
My husband loves it!
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Reviewed in the United States on May 25, 2026
★★★★★ 5
Feels great. Fits great.
Color: White, Size: XX-Large
Fits true to size. Shirt is very comfortable and feels terrific. Will be buying a second shirt shortly.
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Reviewed in the United States on April 16, 2026
★★★★★ 5
Short sleeve shirt
Color: Royal Blue, Size: Small
Comfortable breathable material, perfect size no altering needed, material is soft quality it good as well and easy to wash color doesn’t runs after first wash.
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Reviewed in the United States on April 11, 2026
★★★★★ 4
Very comfortable, fits nicely with my not-so-flat tummy, gorgeous color
Color: Blue, Size: XX-Large, Color: Blue, Size: XX-Large
This is a very comfortable shirt. It feels cool when you wear it and it's slinky soft against your skin. It arrived with fold marks, but those fell out nicely after a few hours hanging. So this is a no-iron shirt for sure, which I love. I haven't tested the stain shield claims but am familiar with this material so I believe it will resist stains. It does dry quickly when damp.
I love the blue color I chose. It's bright and cheerful but not tacky. The photos I posted are pretty close. The material is thick and feels like quality fabric. The stitching is single-stitch, which makes me feel that it's maybe not as durable as double stitched or crossover stitched hems. But regardless, the stitching is tight and the hems are even. The button holes durable and the firmly sewn buttons match the fabric very closely.
The fit is very nice. I'm a bit stout, so slim fit shirts are too tight across my stomach if they fit in the shoulders, or too loose in the shoulders if they fit my middle. The cut of this shirt is a good compromise and it looks very nice. And the slight stretch of the fabric makes it very comfortable when I'm moving around. The collar is stiff enough to sit nicely and not flop too much.
This shirt is great for casual wear but looks nice enough for a more dressy situation. I think it's a good price for a very nice shirt.
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Reviewed in the United States on February 12, 2026