ARP TLX-ARP180-3600-CL360A70 Head Bolt Kit 661317381420 350-455 7/16

( Brand: Arp ), ( Manufacturer Part Number: TLX-ARP180-3600-CL360A70 ), ( Part Type: Head Bolt ), ( Item Weight: 4.9300 ), ( Fitment Type: Direct Replacement ), ( Generic Keywords 1: See Notes ), ( Intended Use: Automobiles ), ( Manufacturer Warranty: 1 Year ), ( UPC: 661317381420 )

Review ARP Oldsmobile Head Bolt Kit 7/16 Inch

The **ARP TLX-ARP180-3600-CL360A70** is a premium, high-performance head bolt kit meticulously engineered to elevate the power, reliability, and durability of Oldsmobile V8 engines ranging from the robust 350 cubic inch displacement to the high-revving 455 cubic inch variants. Designed specifically for engines featuring a 7/16-inch bolt pattern, this kit represents the pinnacle of ARP s legendary bolt technology, combining cutting-edge materials, precision machining, and aerospace-grade engineering to deliver unmatched strength and performance. Each bolt in this kit is crafted from **ARP s proprietary 4340 chrome-moly steel**, a high-strength alloy that has been heat-treated to achieve an impressive tensile strength of **360,000 PSI**, ensuring it can withstand the extreme forces generated by high-performance applications without risk of failure. The bolts feature a **7/16-inch hex head** with a **36-point thread pattern**, a design that maximizes torque transfer while minimizing the potential for rounding or stripping critical for engines that demand both brute strength and fine-tuned precision. The **ARP TLX (Thread Locking Xtended) coating** applied to these bolts provides an additional layer of protection against loosening due to vibration or thermal cycling, a common issue in high-RPM or high-torque applications. This proprietary coating ensures a secure, permanent lock while maintaining ease of installation and removal, making it ideal for both static and dynamic performance scenarios. Whether you're building a street-street machine, a drag racing beast, or a high-revving supercharged or turbocharged engine, this kit is engineered to handle the most demanding conditions with confidence. ARP s attention to detail extends to the **precision-ground threads**, which guarantee a perfect fit with your engine s block and head, eliminating the risk of galling or cross-threading that can compromise structural integrity. The kit includes **all necessary hardware**, including washers and nuts where applicable, ensuring a complete and ready-to-install solution. For Oldsmobile enthusiasts seeking to unlock the full potential of their 350-455 V8 engines, the **ARP TLX-ARP180-3600-CL360A70** is not just an upgrade it s a performance-enhancing necessity, blending ARP s reputation for reliability with the raw power demands of modern muscle and high-performance applications.

### **Pros and Cons of buying a ARP TLX-ARP180-3600-CL360A70 Bolt Kit for Oldsmobile Head Bolts (350-455, 7/16")**

#### **Pros**

1. **High-Quality Material** ARP (Advanced Racing Products) is a well-respected brand known for manufacturing premium, high-strength fasteners. These bolts are made from **AISI 4340 alloy steel**, which is heat-treated to provide exceptional strength and durability, far exceeding OEM specifications.

2. **Enhanced Strength and Performance** The bolts are **torque-to-yield** (or **torque-to-fail**, depending on the specific variant), meaning they are designed to stretch slightly under load before failing, preventing catastrophic engine damage. This is critical for high-performance or heavily modified engines where stress on the head bolts is significantly higher than stock.

3. **Precision Machining** ARP bolts are **precisely machined** to exacting tolerances, ensuring proper fitment and thread engagement. This reduces the risk of cross-threading or improper seating, which can lead to leaks or damage.

4. **Corrosion Resistance** The bolts are **black oxide or cadmium-plated** (depending on the variant), providing better resistance to corrosion compared to standard bolts. This is particularly useful in environments where moisture or salt exposure is a concern.

5. **Compatibility with High-Performance Applications** If you plan to run **forced induction (turbo/supercharger), high RPM, or aggressive camshafts**, these bolts are a necessary upgrade to prevent head gasket failure or bolt stretch. They are commonly used in **LS-based engines, small-block Chevy applications, and other high-stress setups**.

6. **Longevity and Reliability** ARP bolts are built to last the life of the engine if properly installed and maintained. They are a one-time investment that eliminates concerns about bolt failure over time.

7. **Widely Trusted in the Performance Community** ARP is a brand that has been used by professional racers and tuners for decades. Their products are backed by a strong reputation, and many mechanics and enthusiasts consider them the gold standard for head bolts.

---

#### **Cons**

1. **Cost** ARP bolts are **significantly more expensive** than OEM or aftermarket alternatives. A full kit for a 350-455 engine can cost **$200 $300 or more**, depending on the variant. This is a substantial investment compared to cheaper bolt sets (e.g., from **Mega, AC Delco, or other budget brands**).

2. **Installation Requires Care** Unlike stock bolts, ARP bolts **must be installed with precision**. Over-torquing can cause premature failure, while under-torquing may not provide adequate clamping force. Proper **torque sequence and specifications** (typically **80 100 ft-lbs for torque-to-yield**) must be followed to avoid issues.

3. **Not Always Necessary for Stock or Mild Mods** If your engine is **stock or only mildly modified** (e.g., mild cam, stock compression, no forced induction), upgrading to ARP bolts may be **overkill**. In such cases, a **high-quality OEM replacement or a mid-range bolt set** (e.g., **Mega or AC Delco high-performance bolts**) may suffice.

4. **Potential for Overkill in Some Cases** Some enthusiasts argue that **ARP bolts are only truly necessary for extreme builds**. For example, if you re running a **stock head gasket and mild performance mods**, the extra cost may not be justified.

5. **Limited Availability of Specific Variants** While the **ARP180-3600-CL360A70** is a common kit, some older or less common engine applications may require **custom or non-standard bolts**, which could limit options.

6. **Requires Proper Gasket and Installation Practices** Simply replacing bolts with ARP parts **without addressing other potential weak points** (e.g., warped heads, poor gasket surface, or incorrect torque patterns) will not guarantee success. A **full engine rebuild or at least a head gasket replacement** is often recommended when upgrading bolts.

---

### **Conclusion**

The **ARP TLX-ARP180-3600-CL360A70 bolt kit** is one of the best options available for **high-performance, high-stress applications** in Oldsmobile 350-455 engines. Its **superior strength, reliability, and precision** make it an excellent choice for **forced induction builds, aggressive cam setups, or engines running at high RPMs**. However, the **high cost and the need for proper installation** mean it may not be the best fit for **stock or mildly modified engines**.

If your engine is **stock or only mildly modified**, consider **lower-cost alternatives** (e.g., **Mega, AC Delco high-performance, or other reputable brands**) to save money while still improving reliability. But if you re **running a turbo, supercharger, aggressive cam, or high-performance tuning**, the **ARP bolts are a worthwhile investment** to prevent catastrophic failure.

### **Recommendation**

- You are running **forced induction (turbo/supercharger)**.

- Your engine has **aggressive camshafts, high compression, or high RPM applications**.

- You are **rebuilding or heavily modifying** the engine and want the **absolute best in bolt strength**.

- You trust **ARP s reputation** and are willing to pay for **premium reliability**.

- Your engine is **stock or only mildly modified** (e.g., mild cam, no forced induction).

- You want to **save money** and are okay with a **high-quality but less expensive bolt set** (e.g., **Mega, AC Delco high-performance, or other torque-to-yield bolts**).

- You are **not experienced with precise bolt installation** and need something more forgiving.

**Final Verdict:** For **serious performance builds**, the **ARP TLX-ARP180-3600-CL360A70 is the best choice**. For **stock or mild applications**, a **budget-friendly torque-to-yield bolt set** may be sufficient. Always ensure proper **torque sequence, gasket condition, and head alignment** when installing any high-performance bolts.

Details:

PRODUCT OVERVIEW: - High Performance head bolts are available with a reduced wrenching hex or 12-point and wide area flanges that eliminates the need for valve train removal to facilitate cylinder re torquing. Built to outperform and outlast the competition. Factory Sealed - Brand new in box. Supplier Title: ARP Oldsmobile 350-455 7/16 inch Head Bolt Kit.

Made from the highest quality materials. PRODUCT INFO: - ARP Oldsmobile 350-455 7/16 inch Head Bolt Kit, MANUFACTURER PART NUMBER: Part Number: 180-3600,: Olds 7/16, Socket Size s: 1/2 hex,: FEATURES Kit.

part #: 661317381420 prices

• $105.91-$147.82

specifications cranshafengin:

• for makes: Oldsmobile
• brand: Arp
• mpn: Tlx-arp180-3600-cl360a70
• part type: Head Bolt
• item weight: 4.9300
• fitment type: Direct Replacement
• generic keywords 1: See Notes
• intended use: Automobiles
• manufacturer warranty: 1 Year
• upc: 661317381420

returns cranshafengin:

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

seller cranshafengin:

• city: Arlington, TX
• rating: 99.6%
• # reviews: 125345

offer cranshafengin:

• sold: 0
• quantity: 8
• started: February 10, 2026
• availability: In Stock
• options: Ship-to-home

payments cranshafengin:

• credit card: Mastercard
• other
• wallet: Apple-pay

general cranshafengin:

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

shipping cranshafengin:

• class: Expedited
• transit: 3-9 Days
• cost: $0.00
• type: Fixed
• service: Expedited

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