10 Best Quarter Master Clutch 2026

⚡ Quick Verdict

📋 How We Evaluated

Evaluations focused on build quality, material heat resistance, and rotational weight. We analyzed design specifications for compatibility across various racing disciplines.

Diameter	7.25 inches
Part Number	298103
Weight	12.61 lbs
Origin	United States

What We Found

The 298103 V-Drive Clutch represents the gold standard for 7.25-inch racing applications. Its robust construction handles high torque loads found in professional circle track environments. The package weighs approximately 12.61 pounds, providing enough mass to prevent premature stalling while maintaining fast engine response.

Quarter Master utilizes premium alloys in the pressure plate to ensure consistent clamping force throughout a race. Heat dissipation remains a core strength of this unit, as the open design allows significant airflow. The precise engineering reduces parasitic loss, allowing more horsepower to reach the rear wheels.

Installation fits standard racing bellhousings, making it a drop-in upgrade for many chassis types. This clutch proves its worth by maintaining pedal feel even after intense heat cycles.

Who It’s For

This unit suits professional racers needing durability in circle track or road course environments. It works best for drivers who demand consistent, predictable engagement off the corners. The 7.25-inch size offers a balance between aggressive bite and smooth modulation.

If you race in a series that requires high-stress launches, this clutch justifies the investment through longevity. It serves as an excellent choice for teams looking to minimize maintenance intervals between race weekends.

Diameter	5.5 inches
Part Number	38517090
Weight	10.11 lbs
Design	V-Drive

What We Found

The 38517090 V-Drive Clutch is a high-performance 5.5-inch unit designed for maximum speed. Weighing 10.11 pounds, it offers a great balance between structural strength and weight savings. The V-Drive technology ensures that power transmits efficiently, even under extreme load conditions.

The cover design promotes cooling, which is vital for smaller 5.5-inch clutches. This unit handles high-RPM environments with ease, making it a favorite for sprint-style racing. Installation is straightforward for those familiar with 5.5-inch systems.

The overall finish and material quality are exceptional, showing the care put into the manufacturing process. It serves as a reliable core component for any performance-oriented racing transmission system.

Who It’s For

This clutch is for racers who need a lightweight 5.5-inch unit that does not compromise on durability. It is perfect for classes where every pound of rotational weight matters. If you are building a high-revving engine package, this clutch will help you capitalize on that power.

It is also great for teams that need a dependable, long-lasting part for intense racing sessions.

Diameter	5.5 inches
Part Number	38517190ZZ
Design	6-leg open cover
Usage	Multi-discipline

What We Found

The 38517190ZZ V-Drive Clutch features a unique 6-leg open cover design. This specific design choice provides exceptional strength while maximizing airflow through the clutch assembly. It is specifically tailored for sportsman circle track, road course, and off-road racing. The 5.5-inch diameter ensures minimal rotational weight, which is critical for acceleration.

Quarter Master engineers designed this for effective heat dissipation, preventing the common issues associated with smaller clutch sizes. The build quality is rugged, capable of handling the dirt and debris often encountered in off-road racing. It is a highly specialized part that delivers consistent results in diverse racing conditions.

The attention to detail in the cover geometry shows why this remains a trusted choice.

Who It’s For

This clutch is perfect for sportsman racers who compete on varied surfaces. If you race circle track one weekend and road courses the next, this versatile unit handles both well. It is also an excellent option for off-road racers who need a clutch that can breathe.

The cooling design makes it very reliable for long, grueling races.

Diameter	5.5 inches
Part Number	39517090
Assembly	Complete unit
Origin	United States

What We Found

The 39517090 Clutch Assembly provides a complete 5.5-inch solution for serious competitors. This assembly includes everything needed for a seamless upgrade to your drivetrain. The 7.4-inch length and 7.3-inch width footprint ensures it fits within most standard racing chassis. The construction focuses on high-speed stability and consistent clamping force.

Quarter Master has integrated features that simplify maintenance, such as easy access for inspection. The assembly is built to withstand the rigors of competitive track driving, ensuring long life even under heavy abuse. Its performance is smooth and predictable, which helps drivers manage their car’s power delivery more effectively.

This is a top-tier assembly that reflects the best of modern racing engineering.

Who It’s For

This assembly is ideal for racers who want a complete, ready-to-install 5.5-inch clutch solution. It is perfect for those building a new car or upgrading from a worn-out system. The comprehensive nature of this assembly saves time and ensures all components work together perfectly.

If you want a trouble-free, high-performance experience, this is the right choice.

Diameter	7.25 inches
Part Number	298108
Weight	12.3 lbs
Package Quantity	1

What We Found

The 298108 V-Drive Clutch offers a slight weight reduction compared to the 298103 model. It utilizes a 7.25-inch diameter that remains standard for many sportsman racing classes. The assembly arrives in a compact package that weighs 12.3 pounds, making it slightly easier to install in tight spaces.

Quarter Master maintains strict quality control standards, ensuring each unit meets rigorous balance requirements. The clutch cover features structural reinforcements that prevent distortion during high-heat operation. This unit effectively transfers power from high-output engines to the transmission without slipping.

Its design allows for quick gear changes, which helps drivers maintain momentum through complex road course sections. The build quality reflects years of racing development, providing a reliable foundation for any serious racing program.

Who It’s For

This clutch works perfectly for racers who need a reliable 7.25-inch unit with slightly reduced weight. It is ideal for sportsman road course competitors who prioritize acceleration. The design favors quick engine RPM recovery, which benefits drivers in lower-horsepower classes.

It is also a smart choice for teams that frequently swap clutches and need a proven, consistent part that installs without custom fabrication.

Diameter	5.5 inches
Part Number	28517180ZZ
Weight	9.7 lbs
Engine	SBC Crate

What We Found

The 28517180ZZ 5.5-inch V-Drive clutch is designed for 10-spline small block Chevy crate engines. It weighs 9.7 pounds, offering a nice balance of weight and durability. The V-Drive technology provides excellent power delivery, making it ideal for crate engine classes.

Its compact package dimensions ensure it fits easily in most racing chassis. Quarter Master has built this to handle the unique power curves of crate engines, ensuring consistent performance. The build quality is high, with materials selected for heat resistance and strength.

It is a reliable, high-performance unit that is ready for the track. The 5.5-inch size helps keep rotational weight down, which is a major advantage in competitive racing.

Who It’s For

This clutch is specifically designed for crate engine racers. If you compete in a class that requires a small block Chevy, this is your best option. It is also great for those who want a proven, reliable V-Drive clutch.

The performance is consistent, making it easier for drivers to focus on their lines.

Diameter	5.5 inches
Spline	1-1/8 in x 10
Hub Type	Rigid
Quantity	Set of 3

What We Found

This 5.5-inch clutch disc set features a rigid hub design that optimizes power transmission. The set includes three discs, providing a complete solution for specific multi-disc clutch assemblies. The 1-1/8 inch by 10-spline configuration ensures compatibility with many common racing transmissions.

Each disc uses high-performance friction material designed for quick, firm engagement. The rigid hub construction eliminates unwanted movement, resulting in a more direct feel for the driver. These discs weigh very little, keeping rotational inertia at an absolute minimum. They arrive in a small, organized package suitable for trackside transport.

Quarter Master ensures that each disc meets strict thickness and flatness tolerances for consistent performance across the entire set.

Who It’s For

This set is perfect for racers running multi-disc 5.5-inch setups who need a full replacement. It suits those who prefer a rigid hub for maximum drivetrain responsiveness. The universal fitment makes it a versatile option for various custom racing builds.

If your current clutch setup feels spongy or lacks bite, upgrading to these rigid discs will provide a noticeable improvement in engagement.

Diameter	5.5 inches
Part Number	325090
Weight	2.3 lbs
Type	Disc Pack

What We Found

The 325090 Disc Clutch Pack utilizes a compact 5.5-inch design to minimize rotational weight. It weighs only 2.3 pounds, which drastically improves engine acceleration and throttle response. This pack serves as a replacement component for existing 5.5-inch assemblies.

The friction material provides excellent bite, ensuring efficient power transfer through the drivetrain. Because of the smaller diameter, heat dissipation requires careful management, but the unit handles moderate race durations well. The engineering focuses on reducing mass at the flywheel, which helps the engine reach peak power faster.

Everything fits within a small 6-inch package, making it easy to store as a spare. The construction quality matches the high standards expected from Quarter Master components.

Who It’s For

This pack is designed for racers using 5.5-inch clutch assemblies who need to replace worn friction discs. It is ideal for teams that manage their own maintenance and need high-quality replacement parts. If you are looking to freshen up your existing drivetrain, this disc pack is a reliable choice.

It works well for short-track racing where weight savings provide a competitive edge.

Diameter	5.5 inches
Spline	1-1/8 in x 10
Hub	Rigid
Quantity	Pair

What We Found

The 225080 Clutch Disc is a 5.5-inch diameter disc with a rigid hub. This pair of discs is designed for universal application in racing setups. It uses a 1-1/8 inch by 10-spline configuration, making it compatible with many popular transmissions.

The rigid hub construction ensures immediate power transfer and excellent driver feedback. Each disc weighs only 1.58 pounds, which is extremely lightweight. This reduced mass allows for faster shifts and better overall car performance. Quarter Master uses high-quality materials to ensure that these discs hold up under race conditions.

The compact design makes them easy to store and transport. They provide a cost-effective way to refresh your clutch performance without needing an entire assembly.

Who It’s For

These discs are ideal for racers building custom setups or needing a cost-effective performance upgrade. They suit those who value the direct feel of a rigid hub. If you are looking to save weight while maintaining strong engagement, these are an excellent choice.

They are perfect for budget-conscious racers who still demand quality.

Part Number	226080
Spline Type	Coarse
Weight	Not listed
Origin	United States

What We Found

The 226080 Disc Clutch Pack (Coarse) is a reliable replacement part for specific racing transmission setups. It features a coarse spline design that provides a robust connection. The pack arrives in a compact 8.2-inch by 7.8-inch footprint.

Quarter Master ensures that the friction material offers consistent performance throughout the life of the disc. This pack is built with the high standards of the United States manufacturing process. It provides a stable base for power transmission, ensuring that the engine’s output reaches the wheels without slippage.

The build quality is solid, providing confidence that the part will hold up under the pressure of a race. It is a straightforward, effective component for maintaining your vehicle’s performance.

Who It’s For

This pack is for racers who require specific coarse-spline compatibility. It is an ideal maintenance part for those who perform their own clutch services. If you are looking to replace a worn disc in an existing setup, this part is a perfect fit.

It is also a great spare to have in the trailer for quick repairs.

What to Look For Before Buying

You must match your clutch to your engine power and class rules. Think about diameter and weight for your specific car. Always focus on heat management so you do not fail during a race.

Check Determine Your Diameter

Choose between 7.25-inch or 5.5-inch models. Larger ones handle more heat. Smaller ones save weight for better speed. Check your bellhousing clearance first.

Value Assess Heat Management

Racing heat warps metal. Look for open covers to help with cooling. Match the friction material to your race length.

Rating Verify Spline Compatibility

Check your input shaft size and spline count. Wrong splines mean the part will not fit. Verify these numbers twice before you buy.

Verify Consider Rotational Mass

Lighter clutches help your engine rev faster. This improves your exit speed out of corners. Just remember that lighter parts need better cooling.

Frequently Asked Questions

Why choose a 5.5-inch clutch over a 7.25-inch model?

A 5.5-inch clutch cuts weight for faster acceleration. You lose some heat capacity, but the speed gain is worth it for many.

How often should I inspect my clutch discs?

Check your discs after every weekend. Look for uneven wear or heat marks. Finding issues early stops a race-day disaster.

Can I use these clutches on the street?

No, these are for the track. They are too aggressive for street driving and will wear out or fail quickly.

What does the V-Drive designation mean?

V-Drive is a tech that makes power transfer more efficient. It is a signature of this brand’s high-performance parts.

Is the pressure plate included in every assembly?

It depends on the specific item. Read the description carefully to see if you are getting a full assembly or just discs.

🎯 Final Verdict

For most racers, the Quartermaster 298103 V-Drive Clutch is the standout choice. Its 7.25-inch diameter provides the perfect balance of heat management and durability. If you prioritize weight savings, the 38517090 model is a fantastic alternative that excels in high-RPM applications.

Both units demonstrate the precision engineering that makes this brand a leader in racing. Choose the 298103 for general racing needs or the 38517090 for weight-critical setups. Visit the manufacturer website or your preferred racing supplier to secure your order today and upgrade your car’s performance.