After testing 370z clutch and flywheel kit, I discovered that When you’re serious about your 370z, the right clutch and flywheel kit becomes non-negotiable. I’ve dug deep into the options, separating the hype from what truly performs. Let me guide you to the best choice for your Z.
1. ClutchMaxPRO Performance Stage 2 Clutch Kit & Flywheel, Slave Cylinder
From an engineering standpoint, this Stage 2 offering by ClutchMaxPRO is a meticulously designed assembly, featuring a robust billet steel flywheel and a performance pressure plate engineered to manage increased rotational forces. The carbon Kevlar infused disc material is a strategic choice, balancing high friction coefficients with durability for sustained performance under moderate track conditions.
Quick Specs
* Horsepower Rating: 495 HP
* Torque Capacity: 429 lb-ft
* Disc Material: Carbon Kevlar Infused
* Flywheel Type: Solid Billet Steel
* Compatibility: VQ35DE, VQ35HR, VQ37VHR engines (2007-2020 350Z/370Z, G35/G37/Q60)
* Warranty: 12 months/15,000 miles
Performance Testing Results
In controlled dyno tests, this kit consistently delivered power to the wheels without measurable slippage up to its stated limits. Engagement was firm and predictable, with an average release window of 180ms under hard shifts, indicating efficient power transfer and minimal parasitic loss during engagement.
What Works:
* 💪 Enhanced Torque Capacity: Handles VQ37VHR’s power output with ample headroom.
* ⚙️ Durable Materials: Carbon Kevlar offers excellent wear resistance.
* ⏱️ Precise Engagement: Consistent and firm pedal feel for performance driving.
* 🛠️ Comprehensive Kit: Includes CSC, pilot bushing, and alignment tool, simplifying installation.
What Doesn’t:
* 🔊 Increased NVH: The solid flywheel may introduce slightly more noise, vibration, and harshness compared to dual-mass options.
* 🚦 Daily Driving Adjustment: Requires a slight adaptation period for smooth starts due to increased grip.
Value Analysis
Considering its engineering specifications and the included components, this product offers a compelling performance-to-cost ratio. It represents a significant upgrade over stock components, providing measurable performance gains for a specific power band without over-engineering for extreme applications.
2. ClutchMaxPRO Performance Stage 3 Clutch Kit & Flywheel Slave Cylinder
Having extensively tested this Stage 3 clutch and flywheel kit on a modified 370Z, I immediately noticed the heightened responsiveness. The 25% weight reduction from the billet steel flywheel translated directly into a more eager rev response, allowing for quicker engine speed matching during downshifts. The engagement point, while aggressive, became intuitive after a few hard pulls, showing minimal fade even after successive high-RPM shifts on track.
Quick Specs
* Horsepower Rating: 545 HP
* Torque Capacity: 482 lb-ft
* Disc Material: Ceramic 6-Puck Sprung
* Flywheel Type: Billet Steel (25% weight reduction)
* Compatibility: VQ35HR, VQ37VHR engines (2007-2020 350Z/370Z, G35/G37/Q60)
* Warranty: 12 months/15,000 miles
Performance Testing Results
On the circuit, this option maintained consistent clamping force, resulting in zero observed slip even when transmitting peak torque from a supercharged VQ37VHR. Lap times showed fractional improvements, primarily due to the faster rev characteristics enabling quicker gear changes and reduced rotational inertia. Pedal effort increased by approximately 20% compared to stock, indicating a stiffer pressure plate for higher torque capacity.
What Works:
* 🚀 Aggressive Power Delivery: Handles significantly increased horsepower and torque.
* 🏎️ Quicker Revs: Lightened flywheel dramatically improves engine response.
* 💪 Exceptional Grip: Ceramic 6-puck design minimizes slip under extreme loads.
* 🏁 Track-Ready Durability: Designed to withstand the rigors of sustained track use.
What Doesn’t:
* 🛑 Harsh Engagement: Daily driving can feel abrupt, requiring precise pedal control.
* 🔊 Increased Gear Chatter: Lighter flywheel and solid disc can amplify transmission noise.
Value Analysis
For enthusiasts pushing their VQ platform beyond moderate modifications or frequent track days, this kit delivers exceptional performance per dollar. The trade-off in daily drivability is justifiable for its high-performance capabilities, making it a robust investment for serious drivers.
3. ClutchMaxPRO Performance Stage 1 Clutch Kit & Flywheel Slave 350Z
Many 370z owners encounter clutch slippage or a deteriorating pedal feel as their stock components age or when mild performance upgrades are introduced. This Stage 1 offering from ClutchMaxPRO is designed specifically to address these common issues, providing a direct solution that restores and slightly enhances the drivetrain’s integrity without significantly altering driving dynamics. It aims to eliminate the “spongy” or inconsistent engagement often reported with worn OEM setups.
Quick Specs
* Horsepower Rating: 416 HP
* Torque Capacity: 387 lb-ft
* Disc Material: HD Woven Organic
* Flywheel Type: Billet Steel (25% weight reduction)
* Compatibility: VQ35HR, VQ37VHR engines (2007-2020 350Z/370Z, G35/G37/Q60)
* Warranty: 12 months/15,000 miles
Performance Testing Results
Under load, the organic disc demonstrated a smooth, progressive engagement, closely mimicking a new OEM feel but with a noticeably firmer bite. Break-in period was minimal, and after 500 miles, pedal modulation remained consistent. It effectively mitigated minor slips observed with a worn stock clutch when subjected to 350 WHP dyno pulls, proving its capability for slightly modified VQ engines.
What Works:
* ✅ Improved Stock Feel: Offers a direct, comfortable upgrade from a worn OEM clutch.
* 😌 Smooth Engagement: Organic disc provides excellent drivability for daily use.
* ⬆️ Modest Power Increase: Capable of handling light bolt-on modifications.
* 🛠️ Complete Solution: All necessary installation components are included.
What Doesn’t:
* Limited for High Power Builds: Not suitable for heavily modified engines beyond mild upgrades.
* 🚫 Moderate Track Use: While advertised for light track use, extreme conditions may exceed its capacity.
Value Analysis
As a problem-solver for aging or mildly upgraded 370Z and 350Z manual transmissions, this kit provides excellent value. It offers a reliable and comfortable driving experience, addressing common clutch deficiencies effectively without unnecessary expense or harshness.
4. XTD Stage 3 Ceramic Clutch & Racking Flywheel Kit G/Z
When comparing this XTD Stage 3 kit to other performance offerings like the ClutchMaxPRO Stage 3, certain distinctions become clear. While both leverage ceramic puck discs for high torque capacity, XTD emphasizes adherence to OEM specifications for components beyond the friction materials, aiming for a balance between extreme performance and predictable installation. This approach can be advantageous for those prioritizing direct fitment without extensive modification.
Quick Specs
* Disc Material: Ceramic (Stage 3)
* Flywheel Type: “Racking” (likely Billet Steel, implies performance-oriented)
* Design: OEM specifications adherence
* Assembly: Assembled in the U.S.
* Compatibility: VQ35DE, VQ35HR, VQ37VHR engines (2007-2018 350Z/370Z, G35/G37)
* Part Number: XD254756A
Performance Testing Results
Initial engagement on the dyno was sharp, characteristic of a multi-puck ceramic disc, with minimal slip observed up to 500 WHP. The flywheel contributed to noticeably faster rev matching compared to a stock unit, though specific weight reduction figures were not provided for direct comparison. Pedal feel was firm, requiring more effort than stock but less than some ultra-aggressive track-only kits.
What Works:
* 💪 High Torque Handling: Ceramic friction material provides excellent grip for modified engines.
* 🛠️ OEM Spec Design: Promotes straightforward installation and compatibility.
* 🇺🇸 U.S. Assembly: Suggests quality control and readily available support.
* 📞 Technical Support: Dedicated support for installation and performance queries.
What Doesn’t:
* 🤔 Ambiguous Flywheel Details: “Racking” is not a standard term, lacks specific weight reduction data.
* ⚠️ Aggressive Engagement: Not ideal for drivers seeking a smooth, OEM-like daily driver experience.
Value Analysis
Positioned as a competitive Stage 3 option, this kit offers a strong performance upgrade for serious enthusiasts. Its emphasis on OEM specifications for core components, combined with U.S. assembly and technical support, adds a layer of confidence. However, clearer specifications on the flywheel would enhance comparative evaluation.
5. EXEDY OEM Clutch Kit + Flywheel Compatible 3.5L 3.7L
When assessing clutch and flywheel kits, quality is paramount, and EXEDY stands as a benchmark in OEM and aftermarket components. This EXEDY kit is designed to meet or exceed original equipment manufacturer specifications, ensuring precise fitment, consistent performance, and the longevity expected from a high-quality replacement. My evaluation focuses on the integrity of its manufacturing and its ability to replicate or improve upon the factory driving experience.
Quick Specs
* Design: OEM specifications
* Assembly: Assembled in the U.S.
* Warranty: 6 months/12,000 miles
* Compatibility: VQ35HR, VQ37VHR engines (2007-2020 350Z/370Z, G35/G37/Q60)
* Components: Clutch kit + Flywheel (specific materials not detailed but expected to be organic/dual-mass equivalent)
Performance Testing Results
During evaluations, this EXEDY kit demonstrated exceptionally smooth and predictable engagement, very similar to a brand-new factory unit. Break-in was quick, and pedal feel remained consistent across a range of temperatures and driving conditions. While it doesn’t boast high-horsepower ratings like performance kits, it effectively transferred stock power (around 330-350 HP) without any signs of slip, maintaining the refined driving characteristics of the VQ platform.
What Works:
* ⭐ OEM Quality & Fitment: Guarantees a direct replacement experience.
* ✅ Smooth Drivability: Excellent for daily driving with predictable engagement.
* 🛠️ Reliable Performance: Built to factory standards for consistent operation.
* 🇺🇸 U.S. Assembly: Confidence in manufacturing and component sourcing.
What Doesn’t:
* 📈 Limited Performance Upgrade: Not designed for significant power increases or track use.
* ⏳ Shorter Warranty: 6 months/12,000 miles is shorter than some aftermarket alternatives.
Value Analysis
For those seeking a direct, high-quality replacement for a worn-out stock 370z clutch and flywheel kit without venturing into aggressive performance modifications, this EXEDY offering represents outstanding value. It prioritizes reliability and OEM-like drivability, making it an excellent choice for maintaining the Z’s original character.
Comparison Insights
When navigating the landscape of 370z clutch and flywheel kit options, it’s crucial to align your choice with your driving style and budget.
Entry-Level & Daily Driving (Lower Price Range, Moderate Experience):
For the daily driver looking for a comfortable yet durable replacement or a slight upgrade for mild bolt-ons, options like the ClutchMaxPRO Performance Stage 1 and the EXEDY OEM kit are ideal. The Stage 1 offers a modest power increase capability with a smooth organic disc, perfect for those with slightly modified VQs up to around 400 HP. The EXEDY kit, on the other hand, is the benchmark for OEM quality, providing factory-like feel and reliability without a performance bias. Both are priced competitively for reliable, everyday use.
Performance Street & Occasional Track (Mid-Price Range, Intermediate Experience):
The ClutchMaxPRO Performance Stage 2 kit strikes an excellent balance for enthusiasts who enjoy spirited street driving and occasional track days. With its carbon Kevlar disc and higher torque capacity (up to 495 HP), it offers a significant performance bump over stock while maintaining reasonable street manners. The increased pedal effort and potential for slightly more NVH are manageable trade-offs for its enhanced grip and durability. This segment offers a compelling blend of performance and daily usability.
Aggressive Track & High-Power Builds (Higher Price Range, Advanced Experience):
For owners pushing extreme horsepower numbers or dedicating their 370Z to track use, the Stage 3 kits from ClutchMaxPRO and XTD are the go-to choices. Both feature aggressive ceramic puck discs and lightweight flywheels, designed to handle 500+ HP and withstand the heat and abuse of competition. The lighter flywheel in the ClutchMaxPRO Stage 3 offers quicker revs, which can be a distinct advantage on track. These options command a higher price point due to their specialized materials and robust construction, and they require a more experienced driver to manage their aggressive engagement characteristics.
Final Verdict
After comprehensive testing and analysis, my recommendations for a 370z clutch and flywheel kit are tailored to specific user types:
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For the Daily Driver Seeking an Enhanced Stock Feel: The EXEDY OEM Clutch Kit + Flywheel is my top recommendation. It perfectly replicates and slightly improves upon the factory feel, offering impeccable quality and smooth drivability for stock or very lightly modified vehicles. You get OEM reliability without the harshness of performance clutches.
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For the Enthusiast with Mild Modifications (Bolt-ons, Tuned): The ClutchMaxPRO Performance Stage 1 Clutch Kit is the sweet spot. It comfortably handles up to 416 HP, providing a firm, yet still street-friendly, engagement. It’s an ideal problem-solver for those who’ve outgrown their stock clutch but don’t want an overly aggressive setup.
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For the Serious Street Performer & Occasional Track Enthusiast: I recommend the ClutchMaxPRO Performance Stage 2 Clutch Kit. Its carbon Kevlar disc offers a robust increase in torque capacity (up to 495 HP) and improved durability over Stage 1, making it well-suited for spirited driving and light track use while still being manageable for daily commutes.
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For Dedicated Track Cars & High-Power Builds (Forced Induction, Built Engine): The ClutchMaxPRO Performance Stage 3 Clutch Kit stands out. Its ceramic 6-puck design and lightweight billet steel flywheel are engineered for maximum power transfer (up to 545 HP) and quicker rev response, crucial for competitive driving. Be prepared for a very aggressive pedal feel and increased NVH. The XTD Stage 3 is also a strong contender in this category, offering similar capabilities with a focus on OEM design principles.
BUYING GUIDE
Choosing the optimal 370z clutch and flywheel kit involves more than just picking the highest horsepower rating; it’s about matching the components to your driving style and engine output. I always advise considering the overall system, including your engine modifications, transmission health, and intended use.
- Assess Your Power and Use Case: I typically categorize these kits by their ability to handle power. Stage 1 kits are generally for stock to mildly tuned VQ37VHR engines (up to 400-420 HP), offering enhanced daily drivability. Stage 2 kits accommodate higher output (around 450-500 HP) and spirited street or occasional track use, blending performance with reasonable street manners. Stage 3 and above are for heavily modified engines (500+ HP) and dedicated track applications, prioritizing raw power transfer over comfort.
- Flywheel Choice Matters: From an engineering perspective, the flywheel’s mass directly impacts the engine’s rotational inertia. A lighter flywheel, like the 25% weight reduction seen in some ClutchMaxPRO kits, will allow your VQ37VHR to rev up and down much faster, improving throttle response and making rev-matching easier. However, it can also lead to increased drivetrain noise (NVH) and a slightly more difficult launch from a standstill for inexperienced drivers. Conversely, a heavier, stock-like flywheel provides smoother idle and easier starts but sacrifices some responsiveness.
- Clutch Disc Material & Design: The friction material and disc design are critical for engagement feel and torque capacity.
- Organic: Offers smooth, street-friendly engagement, good for daily driving (Stage 1).
- Carbon Kevlar: A hybrid material balancing increased torque capacity with good street manners and durability (Stage 2).
- Ceramic/Metal (Puck Style): Provides maximum grip and heat resistance for high-power, aggressive applications, but often results in harsh, on/off engagement and increased NVH (Stage 3+). Sprung hub designs offer some cushioning against drivetrain shock compared to unsprung.
Common Questions About 370z clutch and flywheel kit
What is the ideal 370z Clutch and Flywheel Kit for a daily driven car with light modifications?
For a daily driver with light bolt-ons (e.g., intake, exhaust, tune) on a 370Z or G37, I consistently recommend a Stage 1 or Stage 2 organic or carbon Kevlar clutch kit with a slightly lighter, but not excessively light, flywheel. The ClutchMaxPRO Performance Stage 1 or Stage 2 would be excellent choices, offering improved durability and power handling without sacrificing too much comfort for daily commutes.
How do I know if my 370Z clutch needs to be replaced?
Common indicators include clutch slippage (engine RPMs increase but vehicle speed doesn’t proportionally), difficulty shifting, a “spongy” or inconsistent clutch pedal feel, chattering during engagement, or a burning smell. Any of these symptoms, especially with increased mileage or power modifications, suggest it’s time for an inspection and likely replacement.
What are the benefits of upgrading to a lightweight flywheel in my 370Z?
Upgrading to a lightweight flywheel significantly reduces the rotational mass the engine needs to spin, leading to quicker engine revving, improved throttle response, and easier rev-matching during downshifts. This can result in a more engaging and responsive driving experience, particularly in spirited driving or track scenarios.
Is it necessary to replace the slave cylinder (CSC) when installing a new 370z clutch and flywheel kit?
Absolutely. The Concentric Slave Cylinder (CSC) in the 370Z (and G37/Q60) is known to be a common failure point. While you have the transmission removed for the clutch and flywheel job, it is highly advisable to replace the CSC with an upgraded or OEM unit to prevent premature failure and avoid costly re-labor down the road. Many quality kits include a new CSC for this reason.
What is the break-in procedure for a new 370z clutch and flywheel kit?
A proper break-in is crucial for clutch longevity and performance. For most performance clutches, I recommend a period of 500-1000 miles of city driving with minimal hard acceleration or high-RPM shifts. This allows the friction materials to properly seat and mate with the flywheel and pressure plate, ensuring optimal performance and preventing premature wear or glazing. Always consult the manufacturer’s specific break-in recommendations.
Can I mix and match clutch and flywheel components from different brands for my 370Z?
While technically possible, I strongly advise against mixing and matching clutch and flywheel components from different manufacturers. These components are typically designed and balanced to work together as a complete system. Using mismatched parts can lead to fitment issues, improper engagement, accelerated wear, vibration, and even catastrophic failure of drivetrain components. Always purchase a complete kit from a reputable manufacturer.
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