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Description
Holley Lo-Ram Manifold Kit Dual Injector- Black - GM LS3/L92 300-683BKDual Injector Manifold and Fuel Rails 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 Low height to aid the packaging of
Dual Injector Manifold and Fuel Rails- 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
- Low height to aid the packaging of a plenum mounted air-to-water intercooler in a top-feed configuration
- Available with both as-cast satin and black power-coat finishes
- High volume fuel rails for eight and sixteen injector configurations. Mounting hardware included with3/4-16 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 | Dual |
| 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 Bore Diameter | 105 MM |
| 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
4.1 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 5
Love!
Size: 8, Color: Vest Pants Set-navy Blue
Great quality! My son was so excited to get a new gentleman suit, and it fits him perfectly. He looks absolutely dapper in it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 19, 2026
★★★★★ 4
Decent quality
Decent quality. True to size. Used for a school dance one time. If using on a regular basis would look for better quality item. Tie that was included was sooo small. Used a tie we already had instead.
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Reviewed in the United States on August 21, 2025
★★★★★ 5
Boys’ Formal Tuxedo Suit
I’m very satisfied with the Boys’ Formal Tuxedo Suit! The suit looked exactly like the pictures, the material feels nice, and it fit my boy perfectly. Delivery was on time and the packaging was good. Great quality for the price!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 20, 2026
★★★★★ 5
Great value and quality, runs slightly small.
This is a great deal and fit perfectly! My kid is more of a size 10 but I ordered size 12. It's only slightly big in the waist but the pants have elastic adjusters so we were able to make it work. It's great quality! We ordered yellow for a school play but I plan to order other colors because my kid feels like a million bucks in his new suit.
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Reviewed in the United States on May 6, 2025
★★★★★ 5
Handsome
Size: 10, Color: Vest Pants Set-navy Blue
Our son wanted to dress nice as we were flying first class. He looked dapper! Even the flight crew loved it!
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Reviewed in the United States on April 3, 2026