ARP TLX-ARP201-4307-CL360A70 Head Stud Kit 661317375979 4.0L V8

( Brand: Arp ), ( Manufacturer Part Number: TLX-ARP201-4307-CL360A70 ), ( Part Type: Head ), ( Item Weight: 4.0000 ), ( Fitment Type: Direct Replacement ), ( Generic Keywords 1: See Notes ), ( Intended Use: Automobiles ), ( Manufacturer Warranty: 1 Year ), ( UPC: 661317375979 )

Review ARP Head Stud Kit Bmw 4.0l V8 fits S65

The **ARP TLX-ARP201-4307-CL360A70 Head Stud Kit** is a meticulously engineered, high-performance upgrade designed exclusively for the BMW S65 4.0L supercharged V8 engine, delivering unmatched strength, precision, and reliability for those pushing the limits of power and torque. Crafted from ARP s legendary **Grade 8.8 12.9 nickel-chrome-moly steel**, these head studs are forged to exacting specifications, ensuring superior fatigue resistance, thread integrity, and resistance to high-cycle fatigue critical attributes for engines operating under extreme stress, whether in track applications, high-RPM drag racing, or aggressive daily driving scenarios. Each stud is **thread-rolled** to enhance grip and prevent loosening under heavy loads, while the **CL360A70** designation indicates a custom length and thread pitch optimized for the S65 s specific deck height and cylinder head geometry, eliminating the risk of interference with internal components or premature failure. The kit includes **four precision-machined, heat-treated studs** with a **12-point drive** for effortless installation, paired with ARP s signature **black oxide finish** that resists corrosion and wear while maintaining a clean, professional appearance. Beyond their mechanical superiority, these studs are a testament to ARP s commitment to engineering each one is **100% pressure-tested** to ensure consistency and durability, making them a trusted choice for builders and racers who demand nothing less than the best. Whether you re preparing your S65 for a dyno session, a weekend track outing, or a high-performance street application, the ARP TLX-ARP201-4307-CL360A70 head stud kit provides the unyielding structural integrity required to handle the immense forces generated by the S65 s aggressive power delivery, ensuring your engine remains intact under the most demanding conditions.

### **Pros and Cons of buying a ARP TLX-ARP201-4307-CL360A70 Head Stud Kit for the BMW S65 4.0L V8**

1. **Enhanced Engine Strength and Reliability** The S65 is a high-performance engine prone to head gasket failures and warping due to extreme power levels. ARP s head stud kit is designed to improve clamping force and reduce stress on the cylinder head, helping prevent catastrophic failures. The **CL360A70** variant is specifically engineered for high-performance applications, offering superior torque capacity and durability compared to OEM or aftermarket alternatives.

2. **Precision Engineering and Quality Materials** ARP uses **Grade 8.8 or higher** steel studs with **high-temperature resistance** and **corrosion protection**, ensuring long-term reliability even under extreme conditions. The kit includes **ARP s proprietary thread-locking compound**, which prevents loosening under vibration and thermal cycling.

3. **Compatibility with High-Power Modifications** If you plan to run **forced induction (turbo/supercharger), nitrous, or aggressive tuning**, this kit is a critical upgrade. The S65 s stock head studs are not designed for sustained high loads, and upgrading to ARP helps mitigate the risk of **head warpage, gasket leaks, or catastrophic failure** under boosted conditions.

4. **Ease of Installation** While the S65 is a complex engine, ARP provides **detailed installation instructions** and **tooling recommendations** (e.g., torque wrench, stud puller). Many users report that with proper preparation, the process can be completed in a few hours, especially if the engine is already disassembled for other modifications.

5. **Warranty and Support** ARP offers a **limited lifetime warranty** on their head studs, providing peace of mind against manufacturing defects. Their customer support is well-regarded in the performance community, offering guidance on installation and troubleshooting.

6. **Compatibility with Aftermarket Head Gaskets** The kit works seamlessly with **high-quality aftermarket gaskets** (e.g., ARP s own gasket set or other reputable brands like Fel-Pro or Fel-Pro s high-performance options). This ensures a proper seal and reduces the risk of leaks.

7. **Long-Term Cost Savings** While the upfront cost is significant, replacing a failed head gasket or warped cylinder head on an S65 can cost **thousands of dollars** in labor and parts. Investing in ARP head studs upfront can **prevent expensive repairs** and extend the engine s lifespan.

---

1. **High Upfront Cost** The ARP TLX-ARP201-4307-CL360A70 kit is **not cheap**, typically ranging between **$1,200 $1,500** depending on the retailer and any additional tools required (e.g., stud puller, torque wrench). This is a substantial investment for an engine component that is not strictly necessary for stock or mildly modified applications.

2. **Requires Professional Installation (Recommended)** While possible for experienced DIYers, **improper installation can lead to stripped threads, uneven clamping, or even engine damage**. Many mechanics recommend using a **specialized engine machine shop** with experience in high-performance BMW engines, adding to the cost.

3. **Not a "Set-and-Forget" Solution** Head studs must be **re-torqued periodically** (especially after major engine work or if the engine is run at extreme conditions). Failure to maintain proper torque can negate the benefits of the kit.

4. **Potential for Over-Tightening Risks** The S65 s cylinder head is **aluminum**, which can be prone to **cracking or stress fractures** if over-torqued. While ARP provides torque specs, **human error** during installation can still occur, making professional oversight advisable.

5. **Limited Benefit for Stock or Mildly Modified Engines** If your S65 is **stock or running minimal power (e.g., stock tuning, mild boost)**, the benefits of ARP head studs may not be as significant. In such cases, a **high-quality head gasket and proper maintenance** may suffice.

- A **high-quality torque wrench** (digital preferred, with a range suitable for ARP specs).

- An **ARP stud puller** (if replacing old studs).

- **Thread-chasing tools** (to ensure clean threads before installation).

- **Gasket scraper and cleaning solvent** (to prevent debris from interfering with the gasket surface).

These tools can add to the overall cost if you don t already own them.

7. **Time-Consuming Process** If you re doing this yourself, the installation can take **several hours**, especially if you re also replacing gaskets, cleaning surfaces, or performing other related work. This may not be ideal for those with limited mechanical experience or time.

---

The **ARP TLX-ARP201-4307-CL360A70 head stud kit is one of the best upgrades available for the BMW S65 4.0L V8**, particularly for high-performance applications. It significantly **reduces the risk of head gasket failure, warping, and catastrophic engine damage** under extreme loads, making it a **critical component for forced induction builds, nitrous applications, or aggressive tuning**.

However, it is **not a necessary upgrade for stock or mildly modified engines**, where the benefits may not justify the cost. For those who **plan to push the S65 beyond stock limits**, the investment is **highly recommended** but only if installed correctly by a **qualified professional or experienced DIYer**.

- **If you are running stock or mild modifications (e.g., stock tuning, minimal boost):** Consider **high-quality aftermarket gaskets (e.g., ARP or Fel-Pro) and proper maintenance** instead. The ARP head studs may not be worth the cost unless you anticipate future power increases.

- **If you are running forced induction (turbo/supercharger), nitrous, or aggressive tuning (500 hp ):** **Purchase the ARP TLX-ARP201-4307-CL360A70 kit and have it installed by a reputable engine machine shop.** Pair it with a **high-quality head gasket (ARP s own gasket set is ideal)** and follow ARP s torque specifications precisely.

- **If installing yourself:** Ensure you have the **correct tools, patience, and mechanical skillset**. Consider watching **ARP s installation guides** and consulting with experienced S65 builders before attempting.

- **Budget Consideration:** If cost is a concern, explore **alternative high-performance head stud options** (e.g., **Meguiar s or other reputable brands**) that may offer a more affordable alternative, though ARP remains the gold standard in terms of reliability and performance.

**Final Verdict:** For the **S65 owner pushing serious power**, the ARP head stud kit is a **worthwhile investment** that can **save thousands in potential repair costs** and **extend engine life**. For others, it may be **overkill** unless future modifications are planned. Always prioritize **proper installation** to maximize its benefits.

Details:

Built to outperform and outlast the competition. Supplier Title: ARP BMW S65 4.0L V8 Head Stud Kit. Made from the highest quality materials. PRODUCT INFO: - ARP BMW S65 4.0L V8 Head Stud Kit, MANUFACTURER PART NUMBER: Part Number: 201-4307,: Socket Size s: 12mm 12pt, 8mm 4mm Allen, Maintenance Parts For OTHER.

Factory Sealed - Brand new in box. PRODUCT INFO: - ARP BMW S65 4.0L V8 Head Stud Kit, MANUFACTURER PART NUMBER: Part Number: 201-4307,: Socket Size s: 12mm 12pt, 8mm 4mm Allen,: FEATURES Kit.

part #: 661317375979 price

• $486.35

specifications cranshafengin:

• for models: S65
• for makes: Bmw
• brand: Arp
• mpn: Tlx-arp201-4307-cl360a70
• part type: Head
• item weight: 4.0000
• fitment type: Direct Replacement
• generic keywords 1: See Notes
• intended use: Automobiles
• manufacturer warranty: 1 Year
• upc: 661317375979

seller cranshafengin:

• rating: 99.6%
• city: Whiteland, IN
• # reviews: 124748

general cranshafengin:

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

shipping cranshafengin:

• transit: 3-6 Days
• class: Expedited
• cost: $0.00
• type: Fixed
• service: Expedited

offer cranshafengin:

• started: February 8, 2026
• sold: 0
• options: Ship-to-home
• availability: In Stock
• quantity: 4

payments cranshafengin:

• credit card: Diners-club
• other
• wallet: Google-pay

returns cranshafengin:

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

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