ARP TLX-ARP218-4702-CL360A70 Head Stud Mazdaspeed Ecoboost 661317375573 Kit 2.3L 6/

( Brand: Arp ), ( Manufacturer Part Number: TLX-ARP218-4702-CL360A70 ), ( Part Type: Head ), ( Item Weight: 2.4000 ), ( Fitment Type: Direct Replacement ), ( Generic Keywords 1: See Notes ), ( Intended Use: Automobiles ), ( Manufacturer Warranty: 1 Year ), ( UPC: 661317375573 )

Review ARP Head Stud Kit Mazda 2.3l Mazdaspeed 6/ Ford Ecoboost fits MUSTANG 2006–2015

The **ARP TLX-ARP218-4702-CL360A70 Head Stud Kit** is a precision-engineered, high-performance upgrade designed exclusively for the demanding applications found in the **2006 2007 Mazda 2.3L Mazdaspeed 6** and the **2015 Ford Mustang EcoBoost**, both of which push the limits of naturally aspirated and turbocharged engine architectures. This kit replaces the stock head studs with **Grade 12.9, 12-point ARP TLX head studs**, which are forged from **AISI 4140 chromium-molybdenum alloy steel**, ensuring superior strength, durability, and resistance to fatigue critical attributes for engines running high boost pressures, aggressive camshaft profiles, or forced induction setups. The **ARP TLX series** is specifically engineered with a **thread-locking compound (CL360A70)** that provides an ultra-strong, vibration-resistant bond between the studs and the aluminum cylinder head, preventing loosening under extreme loads while maintaining ease of installation and removal. Each stud is **heat-treated and shot-peened** to enhance fatigue resistance, ensuring consistent clamping force across the head deck to prevent warping or stress concentrations that could lead to catastrophic failure. The **4702 designation** indicates a **1/4-inch diameter by 2.5-inch length** configuration, perfectly matched to the stock hole pattern in both the Mazda and Ford applications, while the **12-point drive** allows for a more secure and even torque application compared to traditional hex heads. Whether you're running a **turbocharged Mazdaspeed 6 with aggressive camshafts** or pushing the **EcoBoost s 2.3L engine to its limits with a supercharger or nitrous setup**, this head stud kit delivers the reliability and structural integrity needed to handle the increased cylinder pressures and thermal cycling without compromising on performance or longevity. Built to ARP s exacting standards, this kit is a must-have for any high-performance build where stock components simply won t suffice.

### **Pros and Cons of buying a ARP TLX-ARP218-4702-CL360A70 Head Stud Kit for a 2.3L Mazda (2006-2007 Mazdaspeed 6) and 2015 Ford Mustang EcoBoost**

#### **Pros**

1. **Enhanced Engine Strength and Reliability**

- The ARP head stud kit replaces stock studs with high-strength, forged steel components designed to handle extreme loads, reducing the risk of stud failure under high boost or aggressive driving conditions.

- Particularly beneficial for turbocharged or modified engines where cylinder pressures exceed stock limits.

2. **Compatibility with High-Performance Applications**

- The kit is engineered for engines with high compression ratios, forced induction, or aggressive camshafts, making it ideal for both the **Mazdaspeed 6 (2.3L turbo)** and the **2015 Mustang EcoBoost (2.3L turbo)**.

- The **CL360A70** variant is specifically designed for engines with **360 bolt spacing** (common in both applications), ensuring a precise fit.

3. **Improved Thread Integrity and Torque Distribution**

- ARP studs are **self-locking** (via a unique thread design) and distribute clamping force more evenly across the cylinder head, reducing the risk of warping or gasket failure.

- Stock studs can stretch or loosen over time, especially under high RPM or boost, whereas ARP studs maintain tension better.

4. **Easier Installation and Removal**

- ARP studs feature a **hex head** (unlike stock studs, which often require a special tool), making installation and removal simpler without requiring a stud extractor.

- The kit includes **new washers and a torque specification guide**, ensuring proper assembly.

5. **Long-Term Durability and Cost Savings**

- While the upfront cost is higher than stock studs, replacing them prevents catastrophic engine failure (e.g., blown head gasket, cracked cylinder head, or valve bridge failure).

- Avoids costly repairs from stud failure, which can exceed the cost of the ARP kit itself.

6. **Widely Trusted in Performance Tuning Communities**

- ARP is a well-respected brand in high-performance automotive aftermarket parts, with a proven track record in turbocharged and forced-induction applications.

- Many tuners and builders recommend ARP for engines pushing beyond stock limits.

---

#### **Cons**

1. **Higher Upfront Cost**

- The **ARP TLX-ARP218-4702-CL360A70 kit** is significantly more expensive than stock head studs (typically **$200 $300 **, depending on retailer).

- This may be a barrier for budget-conscious builders, though it is a **preventative investment** rather than a consumable part.

2. **Requires Professional or Skilled Installation**

- While easier to install than stock studs, improper torque or misalignment can still cause issues (e.g., head warping, gasket damage).

- Best installed by someone experienced with cylinder head work, though it is **not as complex as a full rebuild**.

3. **Not Necessary for Stock or Mildly Modified Engines**

- If the engine is **stock or running naturally aspirated**, the benefits of ARP studs are minimal, and the cost may not be justified.

- For **mildly boosted applications (under 10 12 psi)**, stock studs may suffice, though they are still a risk under sustained high loads.

4. **Limited Aftermarket Support for Specific Variants**

- While ARP offers a wide range of stud kits, ensuring the **exact CL360A70 variant** is correct for both the **Mazdaspeed 6 and Mustang EcoBoost** requires verification.

- Double-checking bolt spacing and engine specifications is crucial to avoid purchasing the wrong kit.

5. **Potential for Overkill on Some Applications**

- If the engine is **not heavily modified or boosted**, the risk of stud failure may be low, making ARP studs an unnecessary upgrade.

- For **daily drivers with minimal tuning**, stock studs (with proper maintenance) may last the engine s lifespan.

---

### **Conclusion**

The **ARP TLX-ARP218-4702-CL360A70 head stud kit** is a **highly recommended upgrade** for **turbocharged or heavily modified 2.3L engines**, particularly in applications like the **Mazdaspeed 6 (2006-2007) and 2015 Mustang EcoBoost**, where cylinder pressures are elevated due to forced induction.

**For these engines, the benefits improved reliability, even torque distribution, and reduced risk of catastrophic failure far outweigh the cost.** The kit is especially valuable if the engine is **boosted beyond stock levels, runs aggressive cams, or experiences high RPM loads frequently.**

However, if the engine is **stock or only mildly modified**, the expense may not be justified, and stock studs (with regular maintenance) could suffice. In such cases, **monitoring stud tension and replacing them at the first sign of stretch** is a safer alternative.

---

### **Recommendation**

**Install the ARP TLX-ARP218-4702-CL360A70 kit as soon as possible if the engine is boosted or heavily tuned.** This is a **preventative measure** that can save thousands in repair costs from a failed head gasket or cracked cylinder head.

**Skip the ARP studs unless symptoms of stud stretch (e.g., loose head bolts, oil leaks, or compression loss) appear.** In that case, replace them with ARP or another high-quality brand.

- Use a **torque wrench** and follow ARP s specified torque values (typically **80 90 ft-lbs** for these studs).

- Consider **replacing the head gasket and cylinder head bolts** at the same time for optimal reliability.

- If unsure about installation, consult a **performance machine shop** with experience in cylinder head work.

**Final Verdict:** **Worth the investment for turbocharged or modified 2.3L engines in these applications.** The long-term reliability and peace of mind justify the cost.

Details:

This provides a more even clamping force on the head. And for good reason. Factory Sealed - Brand new in box. Remember, an undercut shorter stud will have a rate similar to longer, standard shank.

Studs also provide more accurate and consistent torque loading. Then, when applying torque to the nut, stud will stretch only on vertical axis. If everything is right, the stud should be installed finger tight. Supplier Title: ARP Mazda 2.3L 06-07 MazdaSpeed6/ 2015 Ford Mustang EcoBoost Head Stud Kit.

For most applications, however, studs are recommended. PRODUCT INFO: - ARP Mazda 2.3L 06-07 MazdaSpeed6/ 2015 Ford Mustang EcoBoost Head Stud Kit, MANUFACTURER PART NUMBER: Part Number: 218-4702,: Socket Size s: 12mm 12pt, 4mm Allen, Maintenance Parts For MAZDA MUSTANG. A stud should be installed in a relaxed mode never crank it tightly using jammed nut. Accordingly, the bolt is reacting to two different forces simultaneously.

Accordingly, the bolt is reacting to two: FEATURES ARP Mazda 2.3L 06-07 MazdaSpeed6/ 2015 Ford Mustang EcoBoost Head Stud Kit. When you use bolts to secure the head, fastener is actually being twisted while its torqued proper reading. Made from the highest quality materials. Built to outperform and outlast the competition.

Because the head gasket will compress upon initial torquing, make sure studs and bolts are re-torqued after engine has been run.

part #: 661317375573 price

• $269.16

specifications cranshafengin:

• for models: Mustang
• for makes: Mazda, Ford
• for years: 2006-2015
• brand: Arp
• mpn: Tlx-arp218-4702-cl360a70
• part type: Head
• item weight: 2.4000
• fitment type: Direct Replacement
• generic keywords 1: See Notes
• intended use: Automobiles
• manufacturer warranty: 1 Year
• upc: 661317375573

offer cranshafengin:

• started: April 19, 2026
• sold: 0
• options: Ship-to-home
• quantity: 10
• availability: In Stock

general cranshafengin:

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

seller cranshafengin:

• city: Reno, NV
• # reviews: 159064
• rating: 99.7%

shipping cranshafengin:

• type: Fixed
• class: Expedited
• cost: $0.00
• service: Expedited
• transit: 4-7 Days

returns cranshafengin:

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

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