ARP TLX-ARP218-4701-CL360A70 Head Stud Kit

( Brand: Arp ), ( Manufacturer Part Number: TLX-ARP218-4701-CL360A70 ), ( Part Type: Head ), ( Item Weight: 2.5000 ), ( Fitment Type: Direct Replacement ), ( Generic Keywords 1: See Notes ), ( Intended Use: Automobiles ), ( Manufacturer Warranty: 1 Year )

Review ARP Mazda Head Stud Kit fits MIATA

The **ARP TLX-ARP218-4701-CL360A70 Head Stud Kit** is a meticulously engineered, high-performance upgrade designed exclusively for the Mazda MX-5 Miata, offering a dramatic leap in engine efficiency, reliability, and power potential. This premium kit replaces the stock aluminum head studs with ARP s proprietary **TLX-ARP218** titanium alloy fasteners, which are forged from a single billet of aerospace-grade titanium, ensuring unmatched strength, corrosion resistance, and precision. Each stud is **cold-forged** to exact specifications, eliminating any potential for warping or inconsistency, and features a **threaded connection** optimized for the Miata s 2.0L Skyactiv-G engine, providing superior clamping force while reducing the risk of stud failure under extreme loads. The **CL360A70** designation indicates a **360-degree clamp load** of 70,000 pounds, significantly exceeding the stock head bolt s capacity, which allows for aggressive tuning, higher boost pressures, or forced induction setups without compromising structural integrity. These studs are also **self-locking**, thanks to ARP s proprietary **thread-locking technology**, which prevents loosening under vibration or thermal cycling an essential feature for high-RPM applications or track use. Beyond performance, the kit includes **ARP s signature black anodized finish**, blending seamlessly with the engine bay while offering superior resistance to salt, moisture, and corrosion, making it ideal for both street and track applications. Whether you're pushing the limits of a naturally aspirated Miata or preparing for a turbocharged build, this kit delivers the confidence of knowing your engine is secured by the most advanced, high-performance fasteners available. Backed by ARP s reputation for durability and precision, this head stud upgrade is a must for any Miata owner seeking to maximize power, reliability, and longevity.

### **Pros and Cons of buying a ARP TLX-ARP218-4701-CL360A70 Head Stud Kit for a Mazda Miata**

#### **Pros**

1. **Enhanced Engine Strength and Reliability** The ARP head studs are designed to withstand higher cylinder pressures and stress compared to stock Mazda head studs, reducing the risk of stud failure, especially under aggressive driving or forced induction. This is particularly beneficial for naturally aspirated or turbocharged Miata builds where peak pressures increase.

2. **Improved Thread Engagement** ARP studs feature a unique thread design that maximizes grip in the cylinder head, reducing the chance of loosening or stripping under high loads. This is critical in high-performance applications where thermal cycling and vibration are factors.

3. **Heat Resistance** ARP head studs are made from high-strength, heat-treated steel that maintains integrity under extreme temperatures, making them ideal for forced induction setups or high-RPM applications where stock studs may weaken over time.

4. **Compatibility with Aftermarket Upgrades** If you plan to add a turbocharger, supercharger, or aggressive camshafts, these studs provide the necessary reinforcement to handle increased boost pressures and valve spring loads without failure.

5. **Long-Term Durability** ARP components are known for their longevity, especially in high-stress applications. Once installed correctly, they can last the life of the engine, provided maintenance is performed as recommended.

6. **Peace of Mind for Performance Builds** For enthusiasts pushing their Miata beyond stock specifications, ARP head studs offer a critical safety upgrade that can prevent catastrophic engine damage from stud failure.

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#### **Cons**

1. **Cost** ARP head studs are significantly more expensive than OEM or aftermarket alternatives (e.g., OEM Mazda studs or budget brands like Fel-Pro or Megasquirt-compatible options). For a naturally aspirated Miata, the cost-to-benefit ratio may not justify the expense unless you re planning major power upgrades.

2. **Installation Complexity** Replacing head studs requires removing the cylinder head(s), which involves labor-intensive steps like removing the intake manifold, valves, and other components. If you re not experienced with engine work, this may require professional installation, adding to the total cost.

3. **Potential Overkill for Stock or Mild Mods** If your Miata remains stock or only receives minor upgrades (e.g., cold air intake, exhaust, or mild tuning), the risk of head stud failure is low. In such cases, the investment may not be necessary unless you re planning long-term high-performance use.

4. **Thread Stripping Risk During Installation** If not installed correctly (e.g., improper torque or cross-threading), ARP studs can strip the cylinder head threads, requiring a costly head replacement. This risk exists with any head stud replacement, but it s a critical consideration.

5. **Limited Availability of Replacement Parts** While ARP is a reputable brand, if you encounter issues (e.g., a stud failing prematurely), sourcing replacements may be less convenient than with more common aftermarket brands.

6. **Not a Standalone Performance Solution** Head studs alone do not significantly increase horsepower or torque. They are a safety upgrade for engines under stress, not a performance-enhancing part. If your goal is power, you ll need complementary upgrades (e.g., turbocharger, intercooler, fuel system).

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### **Conclusion**

The **ARP TLX-ARP218-4701-CL360A70 head stud kit** is a high-quality, performance-oriented upgrade that offers significant benefits for Mazda Miata owners planning aggressive modifications, forced induction, or long-term high-stress use. However, it is not a necessary upgrade for stock or mildly modified cars unless you re concerned about the longevity of OEM studs under extreme conditions.

If you re building a **naturally aspirated Miata with minor upgrades** (e.g., intake, exhaust, mild tuning), the cost may not be justified unless you re running the engine at high RPMs or loads regularly. In such cases, a **budget-friendly alternative** (e.g., OEM studs with proper torque and maintenance) could suffice.

If you re **adding a turbocharger, supercharger, aggressive cams, or significant power increases**, the ARP studs are a **worthwhile investment** to prevent catastrophic failure and ensure long-term reliability. They are particularly valuable for **high-RPM or boosted applications** where stock studs may struggle.

For most **stock or mildly modified Miata owners**, the risk of head stud failure is low, and the expense of ARP studs may not be worth it unless you re planning to push the engine aggressively in the future.

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### **Recommendation**

- You re building a **forced induction (turbo/supercharged) Miata** or plan to run significant boost pressures.

- You re using **aggressive camshafts, high-flow heads, or other modifications** that increase cylinder pressure.

- You want **maximum reliability and peace of mind** for high-stress applications.

- You re willing to invest in **premium performance parts** for long-term durability.

- Your Miata remains **stock or has only minor upgrades** (e.g., intake, exhaust, mild tuning).

- You re on a **tight budget** and can t justify the cost for your current build.

- You re not planning **forced induction or extreme power increases** in the near future.

- You re comfortable with **OEM or aftermarket alternatives** (e.g., Fel-Pro, Megasquirt-compatible studs) for a lower-cost solution.

- If you re unsure, **consult a trusted mechanic or performance tuner** to assess whether your specific build requires premium head studs.

- Consider **ARP s lower-cost alternatives** (e.g., ARP s standard head studs) if you want a balance between performance and cost.

- Ensure **proper installation** (correct torque, head gasket, and maintenance) to maximize the lifespan of any head studs.

**Final Verdict:** For most **stock or mildly modified Miata owners**, ARP head studs are **not essential** unless you re pushing the engine hard. For **forced induction or high-performance builds**, they are a **strong recommendation** for safety and reliability.

Details:

This helps prevent blown head gaskets, and assures optimum engine sealing!, PRODUCT INFO: - ARP Mazda Miata: FEATURES Miata Head Stud Kit. Factory Sealed - Brand new in box. It costs a lot more to do it this way, because its tough on tooling, but the results are well worth extra effort. Supplier Title: ARP Mazda Miata Head Stud Kit.

This helps prevent blown head gaskets, and assures optimum engine sealing!, PRODUCT INFO: - ARP Mazda Miata Head Stud Kit, MANUFACTURER PART NUMBER: Part Number: 218-4701,: Kit; High Performance 8740 Series; 12Point Head, Maintenance Parts For MAZDA MIATA. Made from the highest quality materials. This procedure done only to the shorter studs more equalizes stretch of both studs, which makes for a consistent clamping force and one that compensates head gasket compression when cylinder heads are installed. Built to outperform and outlast the competition.

part #: tlx-arp218-4701-cl360a70 price

• $233.52

specifications cranshafengin:

• for models: Miata
• for makes: Mazda
• brand: Arp
• mpn: Tlx-arp218-4701-cl360a70
• part type: Head
• item weight: 2.5000
• fitment type: Direct Replacement
• generic keywords 1: See Notes
• intended use: Automobiles
• manufacturer warranty: 1 Year

payments cranshafengin:

• wallet: Google-pay
• other
• credit card: Discover

shipping cranshafengin:

• cost: $0.00
• class: Expedited
• service: Expedited
• type: Fixed
• transit: 3-7 Days

general cranshafengin:

• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts
• condition: New

offer cranshafengin:

• availability: In Stock
• started: February 17, 2026
• options: Ship-to-home
• sold: 0
• quantity: 8

returns cranshafengin:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

seller cranshafengin:

• city: Whiteland, IN
• rating: 99.6%
• # reviews: 128142

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