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The Edelbrock #61339 Victor Jr. LS3 cylinder head is ideal for use in high Performance’s street and competition engines that have reached their limit with a stock-style cylinder head design. Most aftermarket LS3 cylinder head on the market today are simply stock head designs with larger ports. Our Victor Jr. LS3 cylinder head is an all-new ground up design that incorporates subtle changes for improved flow and combustion. These changes were made to improve the limitations encountered in the stock cylinder head when increasing the performance level of the engine. Changes include a 2.20″ diameter intake valve with a canted configuration similar to what is utilized in the GM LT1 Gen V engine. The intake valve change along with the unique port shape produce almost 400cfm peak flow. This cylinder head also feature fully CNC intake ports, combustion chambers and exhaust ports for consistency and improved performance. All of these changes make this cylinder head capable of producing 600+ hp on an LS3 engine with stock rocker arms, intake manifold and exhaust manifolds.
Edelbrock part #61339 Victor Jr. LS3 (4-bolt flange) is a complete cylinder head ideal for use in high Performance’s street and competition engines that have reached their limit with a stock-style cylinder head design.
Chevrolet:Small-Block Gen IV L76:364 (6.0L);Chevrolet:Small-Block Gen IV L77:364 (6.0L);Chevrolet:Small-Block Gen IV L92:376 (6.2L);Chevrolet:Small-Block Gen IV L94:376 (6.2L);Chevrolet:Small-Block Gen IV L99:376 (6.2L);Chevrolet:Small-Block Gen IV L9H:37

• Capable Of Producing 650+ hp On an LS3 w/Stock Rocker Arms

Edelbrock part #61255 Victor Jr. 23deg 220 cylinder head is designed for small-block Chevy Its 64cc combustion chamber yields around 10:1 compression ratio in a typical flat-top application and about 12.5:1 when used with some of the most common 12cc dome pistons. One of the key features of the Victor Jr. 23deg 220 cylinder head is the CNC machined chambers and bowls, which result in consistency and improved performance. They also feature angled spark plug holes and maintain the stock 23deg valve angle as well as the intake flange bolt pattern for use with 1986 and earlier intake manifolds. All of this allows this cylinder head to deliver 530-580 hp potential right-out-of-the-box, making them ideal for a budget minded engine build desiring a high quality cylinder head that still uses a stud and guide plate rocker system. Cylinder Head Specifications: – Exhaust port location: Raised .300″ – Spark plug fitment: 14mm x .750 reach, gasket seat
The Edelbrock #61255 Victor Jr. 220cc cylinder head is designed for 1955-86 SB Chevy applications. The #61249 Victor Jr. is perfect larger cubic inch small blocks and vehicles where maximum power is needed.
Chevrolet:Small-Block Gen I:302 (4.9L)/327 (5.4L)/350 (5.7L)/400 (6.6L)

• Maximum Valve Lift 0.630 in.

Edelbrock part #61259 Victor Jr. 23deg 220 cylinder head is designed for small-block Chevy Its 64cc combustion chamber yields around 10:1 compression ratio in a typical flat-top application and about 12.5:1 when used with some of the most common 12cc dome pistons. One of the key features of the Victor Jr. 23deg 220 cylinder head is the CNC machined chambers and bowls, which result in consistency and improved performance. They also feature angled spark plug holes and maintain the stock 23deg valve angle as well as the intake flange bolt pattern for use with 1986 and earlier intake manifolds. All of this allows this cylinder head to deliver 530-580 hp potential right-out-of-the-box, making them ideal for a budget minded engine build desiring a high quality cylinder head that still uses a stud and guide plate rocker system. Cylinder Head Specifications: – Exhaust port location: Raised .300″ – Spark plug fitment: 14mm x .750 reach, gasket seat
The Edelbrock #61259 Victor Jr. 220cc cylinder head is designed for 1955-86 SB Chevy applications. The #61259 Victor Jr. is perfect larger cubic inch small blocks and vehicles where maximum power is needed.
Chevrolet:Small-Block Gen I:302 (4.9L)/327 (5.4L)/350 (5.7L)/400 (6.6L)

• Revised Exhaust Valve Angle

The Edelbrock #1126 Ford Flatheads feature a block logo design for Fords and Mercurys, and are cast at the Edelbrock Foundry in the USA of T-6 tempered A356 aluminum. The Edelbrock #1126 heads are rugged, ribbed internally and externally, with a large water capacity and excellent breathing characteristics. The 65cc heads support 8.0:1 compression ratio on blocks with a 3/16″ base relief (stock bore and stroke), compression ratio increase is approximately 3/10 of a percent with each 1/8″ stroke.
The Edelbrock #1126 Ford Flatheads feature a block logo design for Fords and Mercurys, the Edelbrock #1126 heads are rugged, ribbed internally and externally, with a large water capacity and excellent breathing characteristics.
Ford:Flathead:221 (3.6L)/239 (3.9L);Mercury:Flathead:221 (3.6L)/239 (3.9L)

• Increased Flow Capacity

The Edelbrock #1115 Ford Flatheads feature the original Edelbrock script logo design for Fords and Mercurys, and are casted at the Edelbrock Foundry in the USA of T-6 tempered A356 aluminum. The Edelbrock #1115 heads are rugged, ribbed internally and externally, with a large water capacity and excellent breathing characteristics. The 65cc heads support 8.0:1 compression ratio on blocks with a 3/16″ base relief (stock bore and stroke), compression ratio increase is approximately 3/10 of a percent with each 1/8″ stroke.
The Edelbrock #1115 Ford Flatheads feature the original Edelbrock script logo design for Fords and Mercurys, the heads are rugged, ribbed internally and externally, with a large water capacity and excellent breathing characteristics.
Ford:Flathead:239 (3.6L)/255 (4.2L);Mercury:Flathead:239 (3.6L)/255 (4.2L)

• Increased Flow Capacity

The Edelbrock #5023 E-Street cylinder heads are designed for Ford 289-351 W V8 applications. The Edelbrock E-Street cylinder heads offer American made quality and affordable performance. E-Street cylinder heads feature as-cast ports and are designed for entry-level street performance applications operating in the idle-to-5500 rpm range. The modern combustion chamber designs improve the combustion process and larger than stock intake and exhaust ports move more air through your engine for improve efficiency. For use on pre-pollution controlled vehicles only.
The Edelbrock #5023 E-Street cylinder heads are designed for Ford 289-351W applications. American made quality and affordable performance. E-Street heads feature as-cast ports and are designed for street performance applications.
Ford:Small-Block Windsor:289 (4.7L)/302 (5.0L)/351 (5.8L)

• Made In U.S.A.

The Edelbrock #1116 Ford Flatheads feature the original Edelbrock script logo design for Fords and Mercurys, and are casted at the Edelbrock Foundry in the USA of T-6 tempered A356 aluminum. The Edelbrock #1116 heads are rugged, ribbed internally and externally, with a large water capacity and excellent breathing characteristics. The Edelbrock #1116 Ford Flatheads High Lift/Large Chamber version feature a new “raised roof” combustion chamber design that is CNC machined for high lift cams and is perfect for reducing compression in supercharger applications or on low octane fuel. High Lift heads have increased valve clearance and increased flow capacity.
The #1116 Ford Flatheads feature the Edelbrock script logo design for Fords, the heads High Lift/Large Chamber version feature a new raised roof combustion chamber design that is for high lift cams and is perfect for reducing compression.
Ford:Flathead:239 (3.6L)/255 (4.2L);Mercury:Flathead:239 (3.6L)/255 (4.2L)

• Increased Flow Capacity