10 Best Chrysler 440 Six Pack 2026

⚡ Quick Verdict

📋 How We Evaluated

We evaluated these products based on material build quality, compatibility with big-block Mopar specifications, and overall performance value. We also considered installation ease and manufacturer reliability signals.

RPM Range	2000-5800
Duration	227/241
Valve Lift	0.486″/0.473″
Lobe Angle	107 Degrees

What We Found

The COMP Cams Thumpr kit is specifically engineered to give a 383-440 engine a distinct, aggressive exhaust note. It features a 227/241 duration at .050, which optimizes overlap for a choppy idle that turns heads.

The kit includes essential valvetrain components like lifters, valve springs, and retainers, ensuring that all parts work in harmony. With a 2,000-5,800 RPM operating range, this camshaft setup shifts the power band toward the mid-to-high range. It works best when paired with aftermarket converters and steeper rear gears.

The inclusion of assembly lubricant and instructions makes the installation process more straightforward for experienced builders. This kit is a complete package for those looking to transform their engine’s personality and output significantly.

Who It’s For

This kit is perfect for street-strip enthusiasts who want the classic muscle car sound and improved throttle response. It is best suited for drivers who are willing to upgrade their torque converter and rear-end gears to match the cam’s profile.

If your goal is to wake up a stock 440, this provides the most dramatic results in both performance and acoustics.

Core	4-Row Aluminum
Includes	Shroud, Fan, Relay
Dimensions	18-3/4″ x 27-5/8″
Application	1973-1978 440 V8

What We Found

This EGINCOOLER 4-row radiator is a comprehensive cooling kit for 1973-1978 Mopar big-block engines. It comes complete with a shroud, fan, and relay, making it a true all-in-one solution for cooling issues. The 4-row core provides maximum surface area for heat exchange, which is critical for the 440 engine’s output.

The construction uses high-quality aluminum with TIG-welded tanks for durability. The inclusion of a cooling fan and relay simplifies the electrical integration, saving the user time during installation. It is built to meet or exceed OEM performance standards, ensuring your engine runs at the correct temperature even in difficult conditions.

The customer service support is also a notable plus for troubleshooting.

Who It’s For

This is the ultimate choice for someone who wants to fix their cooling system once and for all. It is perfect for high-performance builds that run hot and require an active cooling solution. The all-inclusive kit is great for those who want to avoid sourcing fans and relays separately.

System	6-Rib Serpentine
Finish	Clear Powder Coat
Included	Alternator, AC, Pump, Bracket
Fit	Big Block Chrysler

What We Found

The March Performance 40725 Track Pulley Set is a high-end serpentine conversion for Chrysler big-block engines. This all-inclusive system replaces the outdated V-belt setup with a 6-rib serpentine system, which is more reliable and less prone to belt slippage.

The kit includes the bracket, pulleys, a 140-amp alternator, an AC compressor, a water pump, and a GM Type II power steering pump. The clear powder coat finish provides a sleek, modern look that resists corrosion.

This system is designed for high-performance use, ensuring that your accessories are driven reliably even at high RPMs. It is a significant investment, but it cleans up the engine bay and modernizes the drivetrain accessories.

Who It’s For

This is for the restorer who wants a clean, high-performance engine bay. It is perfect for those who are converting their classic car to modern standards with accessories like AC and power steering. If you are tired of throwing belts, this is the definitive solution.

Application	1973-1978 Big Block
Part Number	72655
Fit Type	Vehicle Specific
Weight	2.0 pounds

What We Found

These spark plug wires are built to handle the high heat of a 440 engine. The lengths are pre-cut, which saves you time and keeps the engine bay looking tidy. They improve electrical conductivity, leading to better combustion and engine response.

These are a favorite for their consistency and reliability during hard runs. They will not degrade like older rubber cables.

Who It’s For

These wires are for the enthusiast who wants to ensure reliable ignition for their big-block Mopar. They are perfect for anyone replacing old, cracked ignition cables with a high-quality, long-lasting alternative. If you are tuning your engine for better performance, these are a mandatory upgrade.

Core Material	Aluminum
Rows	3
Fitment	1973-1979 440 V8
Cooler	Built-in Trans Cooler

What We Found

The Enginkuhler 3-row radiator is a robust cooling solution for 1973-1979 Chrysler 440 engines. Its aircraft-grade 5057 aluminum construction offers superior thermal conductivity compared to stock brass radiators. The radiator features TIG-welded end tanks and an integrated transmission cooler, making it versatile for both automatic and manual configurations.

With a core size of 18.75 by 27.5 inches, it fits well within the factory mountings of most Mopar B-body and C-body cars. The inclusion of a brass petcock drain and a CNC-machined filler neck shows attention to detail in its manufacturing.

This unit is designed to handle the high heat output of the 440 big block during long cruises or heavy traffic.

Who It’s For

This radiator is for owners of 1970s Mopar vehicles who need reliable cooling for their 440 engines. It is an excellent choice for those doing full engine rebuilds who want to ensure their cooling system can keep up with modern driving standards.

It provides a great balance of performance and ease of installation.

Design	OSGR High Torque
Voltage	12V
Tooth Count	9
Weight	23 lbs

What We Found

This starter uses an Offset Gear Reduction design to replace older units. It provides more torque, which helps turn over high-compression big-block engines. It is lighter than the original, making it much easier to bolt into tight engine bays. The unit is built to handle road vibration and heat.

It is a reliable way to ensure your car starts every time.

Who It’s For

This starter is ideal for owners of classic Mopar vehicles who are tired of sluggish cranks or hard starts. It is especially useful for high-compression 440 builds that require extra torque to turn over.

It is also a great choice for those restoring marine applications or vehicles with limited space for heavy, bulky original starters.

Housing	Aluminum
Impeller Vanes	6
Impeller Material	Steel
Includes Gasket	Yes

What We Found

This A-Premium water pump is a reliable replacement part for a wide variety of Chrysler 440 applications. Featuring an aluminum housing and a steel impeller, it is designed for durability and longevity. The 6-vane impeller design ensures efficient coolant circulation throughout the engine block.

It comes with the necessary gasket, which simplifies the installation process. The pump is precision-machined to match original equipment specifications, ensuring a perfect fit and no leaks. It is an essential component for maintaining proper engine temperatures in classic Mopars.

Given the age of many of these vehicles, replacing the water pump with this new unit is a proactive step to prevent cooling failures.

Who It’s For

This water pump is for anyone performing an engine overhaul or addressing a leaking cooling system on a classic Chrysler. It is perfect for the budget-conscious restorer who needs a reliable, high-quality replacement that meets factory standards without the premium price tag of rare original parts.

Material	Aluminum
Core Size	17.5” x 26”
Fitment	1966-1970 440 V8
Construction	4-Row

What We Found

This RadySpeed 4-row radiator uses all-aluminum construction to improve cooling efficiency for the 440 engine. The core measures 17.5 by 26 inches, providing a substantial surface area for heat dissipation. Designed specifically for 1966-1970 Chrysler 7.2L V8 applications, it replaces aging stock units that often struggle with modern highway speeds.

The TIG-welded tanks ensure structural integrity under pressure, while the lightweight aluminum design helps reduce front-end weight. While fitment remains specific to these years, the unit offers a direct upgrade path for those experiencing overheating issues. The manufacturer emphasizes advanced manufacturing techniques to ensure consistent performance.

Buyers should verify their specific hose configuration before ordering to confirm compatibility with their current water pump setup.

Who It’s For

This radiator is ideal for owners of 1966-1970 Mopar muscle cars who experience overheating during spirited driving or summer traffic. It serves as a necessary upgrade for anyone replacing a clogged original copper radiator with a more efficient modern alternative.

Because it requires precise fitment, it suits hobbyists comfortable with minor cooling system adjustments. It provides excellent value for those prioritizing engine longevity over factory-original aesthetics.

Finish	Zinc
Compatibility	361-440 Big Block
Years	1967-1987
Material	Steel

What We Found

This zinc-plated oil pan serves as a replacement for 1967-1987 Chrysler big-block engines. The zinc coating provides excellent corrosion resistance, which is vital for an under-car component exposed to road salt and moisture.

It is designed to fit the 361, 383, 400, 413, and 440 engines, offering broad compatibility across the Mopar big-block family. The construction is solid and designed to meet factory depth and capacity requirements.

While it lacks internal baffles for extreme racing, it is an ideal replacement for a rusted or damaged stock pan. The zinc finish also looks cleaner and more modern than standard painted steel pans, providing a subtle aesthetic upgrade for the bottom of the engine.

Who It’s For

This oil pan is ideal for the restorer who is dealing with a leaking or dented original pan. It is a great choice for those who want a long-lasting, rust-resistant replacement for a street car. It provides a simple, effective solution for keeping the engine’s oil system sealed and protected.

Size	5″ x 2.25″
Material	Vinyl
Finish	Clear overlaminate
Application	Adhesive

What We Found

These decals provide a simple way to add period-correct flair to your air cleaner or toolbox. Printed on high-quality white vinyl with a clear overlaminate, they resist fading from sun and heat. The 5-inch by 2.25-inch size fits perfectly on most standard air cleaner housings.

While these are reproductions and not OEM parts, the print quality is sharp and professional. They are easy to apply to any clean, hard surface and can be removed without damaging the paint. The solvent printer technology ensures they remain outdoor-durable for years.

This is a cost-effective way to complete the aesthetic of an engine bay restoration without breaking the bank.

Who It’s For

These decals are for the enthusiast who values the small details of their engine bay. They are perfect for anyone finishing a restoration or wanting to add a classic touch to their air cleaner. They provide an inexpensive way to achieve a professional look on a budget.

What to Look For Before Buying

Choosing the right parts for a Chrysler 440 Six Pack requires a focus on compatibility and heat management. These engines run hot, so prioritize cooling efficiency above all else. Always check your engine year and accessory setup before you buy.

Investing in quality parts now will save you from headaches later.

Check Verify Engine Compatibility

Check your block and water pump configuration. Mopar big blocks changed over the years, so hose locations vary. Always confirm your chassis year before ordering.

Value Prioritize Material Quality

For cooling and engine components, always choose aluminum or hardened steel over standard replacements. Aluminum offers superior thermal conductivity for radiators, helping your engine run cooler under load. Hardened steel parts in the valvetrain or starter ensure longevity. Do not compromise on build quality for cheaper alternatives.

Rating Assess Power Goals

Determine if you are building a stock-style cruiser or a high-performance street machine. Performance parts like high-lift cams require supporting modifications like upgraded converters. If your power goals are modest, stick to OEM-spec components. Always match your part choices to your intended driving style.

Verify Check Accessory Fitment

When upgrading pulleys or starters, consider the available space in your engine bay. Serpentine conversions are excellent but require specific mounting brackets and belt lengths. Always measure your available clearance before ordering large kits. Proper planning saves hours of frustration during the actual assembly phase.

Frequently Asked Questions

Can I use a modern radiator in my classic Chrysler?

Yes, aluminum radiators are much better than original brass ones. They cool more efficiently and weigh less. Just make sure the dimensions fit your car.

Why is the Thumpr cam considered a top choice?

It is a top choice because it gives you that classic, aggressive idle. It also improves your power band significantly.

Do I need a new water pump with a radiator upgrade?

It is not required, but I would highly recommend it. A new pump ensures your cooling system works at its best.

Are serpentine conversions worth the cost?

Yes, they are worth it for serious builds. They stop belt slippage and make your accessory drive much more reliable.

How do I ensure fitment for my specific 440?

Check your engine casting number and vehicle year. Mopar big blocks changed a lot over the years. Contact the manufacturer if you have questions.

🎯 Final Verdict

For the best 440 experience, I would shortlist the COMP Cams Thumpr kit to wake up the engine. Pair it with the EGINCOOLER 4-row radiator to keep everything at the right temperature. These two parts provide the sound, power, and reliability you need for a fun build.

Always double-check your fitment specs before finalizing your order.