Mopar Small Block Engine Performance Parts

Unleash the Power: Mopar Performance for Small Block Engines

The rumble of a classic Mopar V8 is an unmistakable sound, a testament to the raw power and engineering prowess that defined an era of automotive excellence. For enthusiasts looking to restore, enhance, or completely transform their beloved Chrysler, Dodge, or Plymouth muscle cars, Mopar Performance offers an unparalleled selection of engine parts. Specialising in the venerable small block "LA" series V8 engines – the 273, 318, 340, and 360 cubic inch powerhouses, along with their Magnum evolutions – Mopar Performance provides the components needed to achieve anything from a factory-correct rebuild to a full-blown, track-dominating racing machine.

This comprehensive guide delves into the vast array of Mopar Performance engine parts available, focusing on the critical components that form the heart of your V8. Whether you're building a street-friendly hot rod, a weekend cruiser, or an all-out drag car, understanding the options is key to achieving your performance goals. We'll explore everything from the fundamental rotating assembly to the intricate details of the valve train and induction systems.

The Foundation: Small Block Mopar Rotating Assemblies

The engine block's bottom end and rotating assembly are the absolute bedrock of any performance engine build. The quality and selection of these components directly dictate the ultimate power output, overall reliability, and the longevity of your powerplant. It cannot be overstated: do not cut corners in this critical area. Failures here are notoriously expensive to repair and can result in catastrophic damage, turning a dream project into a costly nightmare.

Mopar Performance understands this, offering a complete spectrum of components designed to meet diverse performance objectives and budgets. Building the strongest, most reliable rotating assembly your budget allows is a wise investment that will pay dividends for years to come.

Pistons: The Heartbeat of Combustion

Pistons are fundamental to converting fuel into power. Mopar Performance provides a wide selection, catering to all needs:

• Stock Replacement Pistons: For those undertaking a faithful restoration, these ensure factory-spec fitment and performance.
• Hypereutectic Performance Pistons: Offering improved strength and thermal stability over standard cast pistons, these are an excellent choice for enhanced street performance.
• Forged Pistons: The pinnacle of piston technology, forged pistons are incredibly strong and lightweight, essential for high-compression, high-RPM, or forced induction applications.
• Racing Pistons: Engineered for the most extreme conditions, these pistons are built to withstand immense cylinder pressures and heat.

A comprehensive listing of available Small Block Mopar pistons from various reputable brands ensures you can find the perfect match for your build.

Connecting Rods: Transferring the Force

Connecting rods are the vital link between the piston and the crankshaft. Mopar Performance offers rods for the 273, 318, 340, and 360 engines, available in various specifications to suit different power levels. From robust factory replacements to high-strength aftermarket options, each is designed for optimal performance and durability.

Crankshafts: The Backbone of Rotation

The crankshaft is responsible for converting the linear motion of the pistons into rotational force. Mopar Performance provides both stock-stroke and stroker crankshafts for the 318, 340, and 360 engines. Stroker kits, which typically include a crankshaft, connecting rods, and pistons, allow you to increase displacement, thereby significantly boosting torque and horsepower.

Key Crankshaft Features to Consider:

Flexplates and Harmonic Balancers: Crucial for Smooth Operation

Ensuring the smooth and reliable operation of your engine requires proper dampening and a robust connection to the transmission. Mopar Performance offers high-performance and SFI-approved flexplates, essential for high-horsepower applications to prevent catastrophic failure. Harmonic balancers are also critical for absorbing torsional vibrations, protecting the crankshaft from stress. Various options are available, including SFI-approved steel dampers with universal 6-bolt front pulley mount patterns.

The Top End: Cylinder Heads, Valvetrain, and Induction

Once the foundation is solid, attention turns to the components that control the intake of air and fuel and the expulsion of exhaust gases. This is where significant power gains can be realised.

Cylinder Heads: The Gateway to Power

Mopar Performance offers a range of cylinder heads to suit different needs:

• "A" Engine Cast Iron Cylinder Heads: Featuring high swirl port technology, these are excellent pre-Magnum heads, with specific options for the 360hp featuring W-2 rocker arms.
• Ported Head Assemblies: These heads undergo significant port work, drastically increasing airflow (often over 44% on the intake side) by focusing on the bowl area. They are typically assembled with valves, springs, and retainers.
• W2 Cast Iron Race Cylinder Heads: Designed for competition, these feature float-machined rocker pads and require specific rocker arm stands and longer valves for higher lifts. Various chamber sizes and valve angles are available.
• Aluminum Commando Cylinder Heads: These high-performance cast aluminum heads are 100% interchangeable with cast iron heads. They feature high-flow intake ports, can accommodate standard valves and rocker shafts, and offer a smaller combustion chamber for increased compression. Specific versions include bare heads and large port options.

Valvetrain Components: Precision and Durability

The valvetrain ensures the precise timing of valve opening and closing. Mopar Performance provides a vast selection:

• Intake and Exhaust Valves: Available in various sizes and materials (all stainless steel with swirl-polished underheads), including options for standard "A" engines, W2/W5 heads, and extra-long race valves for Stage VI, W7, and W9 applications.
• Valve Springs: Crucial for controlling valve float at high RPMs, Mopar offers single, dual, and triple springs with various lift ratings and damping characteristics.
• Valve Spring Retainers and Locks: These components ensure the valve springs are properly seated and tensioned. Options include standard chrome-moly and lightweight titanium retainers.
• Rocker Shafts and Rocker Arms: Whether you need standard hydraulic rocker arm packages with enhanced durability or high-performance mechanical options for W2/W5 heads, Mopar has you covered. Billet aluminum rocker shaft hold-downs are also available for increased stiffness and to maintain rocker shaft roundness under high spring loads.
• Timing Chain Kits: High-strength double roller timing chain kits, including magnafluxed sprockets and roller timing chains, ensure accurate camshaft timing. A new timing chain tensioner is also available to replace the thrust plate, designed for both "A" and Magnum engines.

Camshafts and Lifters: Dictating the Engine's Personality

The camshaft profile is arguably the most significant factor in determining an engine's powerband and characteristics. Mopar Performance offers both hydraulic and solid mechanical cam and lifter packages for pre-Magnum "A" engines up to 1991. These packages typically include lifters, assembly lube, and the camshaft itself, with various durations and lift profiles to suit different driving styles and performance goals, from mild street use to aggressive racing applications.

Intake Manifolds: Optimising Airflow

The intake manifold's design directly impacts airflow into the cylinders. Mopar Performance provides a variety of intake manifolds:

• Dual Plane Manifolds: Available in 2-barrel and 4-barrel configurations, these are excellent for street applications, offering good low-end torque and drivability. Options exist for cast iron and aluminum construction, with different port configurations (rectangle and oval).
• 6-Barrel Dual Plane Manifold: A distinctive intake for those seeking a unique look and enhanced performance with a 6-barrel carburettor setup.
• Single Plane Manifolds: Primarily designed for high-RPM performance and racing, these manifolds provide a more direct and unobstructed path for air into the cylinders. Available for 4-barrel carburettors, with various port sizes and designs to match specific cylinder heads (standard, W2, W5, W7/W8/W9).

Engine Dress-Up and Ancillaries: The Finishing Touches

Beyond the core engine components, Mopar Performance offers a range of parts to enhance appearance, improve sealing, and ensure proper fluid management.

Valve Covers: Style and Function

Valve covers not only seal the valvetrain but are a significant visual element. Mopar offers:

• Chrome Stamped Steel Valve Covers: A classic, cost-effective way to dress up your engine bay, featuring the Mopar logo.
• Polished Cast Aluminum Valve Covers: Offering superior rigidity and a high-quality, show-car finish, these are polished to a chrome-like shine and help prevent leaks.
• Black Wrinkle Painted Cast Aluminum Valve Covers: Providing a bold, high-strength look with better anti-leak properties than standard aluminum covers.
• "As Cast" Aluminum Valve Covers: Intended for serious racers, these allow for custom breather setups and are ready for welding or modification without paint removal.
• Stamped Aluminum Valve Covers: Lightweight and anodized, these offer a distinctive look with the Mopar logo imprinted.

Various accessory kits, including valve cover bolts, gaskets, oil filter caps, and breather caps, are also available to complete the installation.

Oil Pans and Windage Trays: Lubrication Management

Proper oil management is crucial for engine health. Mopar Performance offers oil pan packages, including the pan, dipstick, drain plug, and oil pickup, in both center and rear sump configurations to suit different vehicle applications. Windage trays are also available to reduce the detrimental effects of oil sloshing at higher engine speeds, improving lubrication and potentially power.

Oil Pumps and Water Pumps: Vital Fluid Circulation

A high-performance, high-output oil pump assembly can provide a significant increase in oil volume, ideal for high-performance applications. Mopar offers these assemblies to ensure adequate lubrication under demanding conditions. Water pump assemblies, available in basic high-flow designs with either six or eight blades, are essential for maintaining optimal engine temperatures.

Mopar Performance Part Numbers and Legacy

The provided information also includes a historical reference to specific Direct Connection - Mopar Performance part numbers. While these items may no longer be directly sold, this information is invaluable for identifying parts found at swap meets, car shows, or on the secondary market. It serves as a helpful reference for enthusiasts seeking specific original Mopar Performance components.

Frequently Asked Questions

Q1: What are the primary small block Mopar engines supported by Mopar Performance parts?
Mopar Performance offers parts for the "LA" series V8 engines, specifically the 273, 318, 340, and 360 cubic inch engines, as well as their Magnum counterparts (from 1993 onwards).

Q2: Where can I buy Mopar Performance parts?
Mopar Performance parts are available through authorised dealers and performance parts suppliers. JEGS is mentioned as a retailer offering the Mopar Performance line.

Q3: What does a typical Mopar engine hardware kit include?
A Mopar Hardware Kit can include items such as dowels, plugs, rear camshaft plate, screws, oil feed and scavenge tubes, oil crossover line and fittings, camshaft bearing retaining screw, a replacement timing cover, and a water pump crank drive hub.

Q4: Can I mix and match components from different Mopar Performance product lines?
While Mopar Performance designs parts to work together, it's always advisable to consult with a knowledgeable parts specialist or refer to specific application notes to ensure compatibility, especially when combining "A" engine parts with Magnum components or highly specialised racing parts.

Q5: Why should I choose Mopar Performance parts over generic aftermarket options?
Mopar Performance parts are factory-engineered and tested by Chrysler engineers, ensuring optimal power, durability, and ease of installation. They are designed with the specific characteristics of Mopar engines in mind, often providing a level of integration and reliability that generic parts may not match.

In conclusion, Mopar Performance provides an extensive and high-quality range of engine parts for small block Mopar V8s. By carefully selecting components for the rotating assembly, valvetrain, induction, and dress-up items, enthusiasts can build Mopar engines that are not only powerful and reliable but also a true reflection of their passion for these iconic vehicles.

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