![Intake Manifold for 1955-1986 Small Block Chevy 262-400, Dual Plane [Black]](https://www.jegs.com/images/mini_750/500/555/555-513003.jpg)
Intake Manifold for 1955-1986 Small Block Chevy 262-400, Dual Plane [Black]
JEGS 555-513003 Intake Manifold Features:
- Port exit dimensions: 1.170 in. W x 1.900 in. H
- Recommended Intake Gasket For Apps without Heat cross overuse JEGS p/n 555-210002
- Recommended Intake Gasket For Apps with Heat cross overuse JEGS p/n 555-210004
- Intake gasket port matching is recommended for optimum performance
- Estimated runner length - Shortest: 4 in.
- Estimated runner length - Longest: 7 in.
- Manifold height: (A) 4.290 in. + (B) 5.310 in. divided by 2 = 4.800 in.
- Click here to determine carburetor pad height.
- Also Fits 1987-Up stock aluminum heads (does not fit 1987-Up cast iron or Chevrolet Bow Tie heads)
- Accepts late-model choke, water neck, AC, alternator, and HEI
- No provision for divorced or heated choke
- Stock/stamped steel valve covers may require 3/16 in. (or thicker) valve cover gaskets. We recommend 555-21100, 555-210075, or 555-210070 for adequate runner clearance.
| JEGS Carb Recommendations/Notes | ||||
| Carburetors | ||||
| 570 CFM | 670 CFM | 770 CFM | ||
| Up to 300 HP | 300 to 400 HP | 400 to 500 HP | ||
| Manual Choke | 510-0-81570* | 510-0-81670* | 510-0-81770* | |
| Electric Choke | 510-0-80570* | 510-0-80670* | 510-0-80770* | |
| * Square Flange Carburetors Require Adapter Plate 555-15442 | ||||
| Carburetor Studs | ||||
| 555-15840 | 1-1/2" Studs | Suggested for carb and gasket only | ||
| 555-15841 | 2" Studs | Suggested for carb and 1/2" spacer | ||
| 555-15842 | 2-1/2" Studs | Suggested for carb and 1" spacer | ||
| 555-15846 | 3-1/2" Studs | Suggested for carb and 2" spacer | ||
| Carburetor Base Gaskets | ||||
| 555-16100 | Open (Square Flange) | |||
| 555-16105 | 4-Hole (Square Flange) | |||
| 555-16120 | 4-Hole (Spreadbore) | |||
| Intake Manifold Bolts | ||||
| 555-83200 | SBC - Standard | |||
- Carburetor Fuel Inlet Lines & Fittings
- Carburetor Spacers
- Fuel Filters
- Carburetor Linkage, Choke Kits & Components
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
FAQ
What's better, a single or dual plane intake manifold?
- The JEGS 555-513003 Intake Manifold for Small Block Chevy 262-400 is a dual-plane design, providing a balanced combination of low-end torque and high-end horsepower, making it an excellent choice for various applications.
Does a bigger intake manifold increase horsepower?
- While size matters, the design is crucial. The JEGS 555-513003 intake manifold optimizes airflow, contributing to increased horsepower within its specified RPM range, making it an effective choice for performance.
What are the two types of intake manifolds?
- Intake manifolds come in single-plane and dual-plane designs. The JEGS 555-513003 represents a dual-plane manifold, providing a balance of torque and horsepower across a wide RPM range.
Dual-Plane Performance Intake
JEGS Champion Series 331 Dual Plane Aluminum Intake Manifolds feature the latest machining techniques to ensure the highest-quality performance. The cast aluminum intake manifold construction yields a lighter, more consistent casting for smoother intake runners, optimal fuel atomization, and improved fuel & air distribution to the cylinders—resulting in more power!



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