PY CLASSIC LOCKS TK157 Gm Ignition Lock Cylinder Octagon Key

( Brand: Py Classic Locks ), ( Manufacturer Part Number: TK157 ), ( Part Type: Ignition Lock Cylinder )

Review PY CLASSIC LOCKS Gm Ignition Lock Cylinder Replacement Octagon Key Without fits 1951-64

The **PY Classic Locks TK157 Ignition Lock Cylinder** is a meticulously crafted, vintage-inspired automotive security component designed to replicate the iconic styling and functionality of General Motors (GM) vehicles produced between 1951 and 1964. This octagonal-key cylinder is a faithful reproduction of the original ignition locks used in classic American cars, embodying the sleek, angular aesthetic of mid-century automotive design. The cylinder features a robust, die-cast metal housing with sharp, geometric contours that align perfectly with the era s signature styling cues, ensuring both an authentic look and a secure fit within the vehicle s dash panel. Engineered with precision, the TK157 incorporates a high-quality internal mechanism that mimics the smooth yet deliberate operation of the original, providing a satisfying tactile experience when turning the key. The octagonal keyway is a defining characteristic, offering a unique and secure method of activation that distinguishes it from modern, standardized designs. Whether restoring a vintage Chevrolet, Buick, or Oldsmobile or simply appreciating the craftsmanship of an earlier era, this ignition lock cylinder delivers both historical authenticity and reliable performance. Built to endure, it combines durability with a nostalgic charm, making it an essential upgrade for enthusiasts seeking to preserve or enhance the classic appeal of their beloved GM vehicles.

**Pros and Cons of Buying a PY Classic Locks TK157 (1951 1964 GM Ignition Lock Cylinder with Octagon Key)**

### **Pros**

1. **Authentic Fit and Functionality** This is a direct replacement part designed specifically for 1951 1964 General Motors vehicles, ensuring compatibility with the original ignition system. It maintains the same mechanical operation as the factory lock, including the octagon-shaped keyway, which is rare in modern replacements.

2. **Durability and Longevity** PY Classic Locks is a well-regarded brand known for producing high-quality, long-lasting ignition cylinders. The TK157 is built to withstand regular use without excessive wear, reducing the risk of premature failure.

3. **Security Features** Unlike some aftermarket locks that are easily bypassed, this cylinder retains the original security mechanisms of the GM design. The octagon keyway is less common than standard keys, making it slightly harder for thieves to hot-wire or duplicate without the correct key.

4. **Compatibility with Classic Cars** For enthusiasts restoring or maintaining vintage GM vehicles (such as Chevrolets, Pontiacs, or Buicks from that era), this is the most accurate and reliable option. It preserves the car s original aesthetic and function.

5. **Ease of Installation** The TK157 is designed to be a straightforward drop-in replacement. Most mechanics or DIYers with basic tools can install it without modifying the steering column or ignition housing.

6. **Key Duplication Availability** Since the octagon keyway is standard for this era, key blanks and duplication services are widely available, though you may need to specify the "octagon" shape to ensure compatibility.

7. **Prevents Theft and Hot-Wiring** The original GM ignition locks were notoriously difficult to bypass, and this replica maintains that level of security. It deters opportunistic theft and reduces the risk of someone hot-wiring the vehicle.

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### **Cons**

1. **Limited Modern Compatibility** This lock is designed exclusively for 1951 1964 GM vehicles. If you plan to use it in a modern car or a vehicle from a different era, it will not fit. Additionally, some aftermarket security systems or immobilizers may not work with it.

2. **Key Loss Risks** Losing the octagon-shaped key can be problematic. While duplicates are available, the keyway is less common than standard keys, so you ll need to ensure you have a spare or know where to obtain one quickly.

3. **Potential for Key Wear** Over time, the octagon key can wear down, especially if the lock cylinder is not well-lubricated. This may require periodic key resharpening or replacement of the cylinder itself.

4. **Cost Compared to Universal Locks** This is a specialized part, and while not extremely expensive, it may be pricier than a universal ignition lock cylinder that could fit multiple vehicles. However, the cost is justified for classic car owners who prioritize authenticity.

5. **No Electronic Immobilizer Support** Modern vehicles often require electronic ignition systems for anti-theft purposes. This mechanical lock will not integrate with such systems, which could be a drawback if you plan to add modern security features later.

6. **Availability of Parts** While PY Classic Locks is reputable, availability may vary depending on the region. Some specialty auto parts stores or online retailers may not stock this specific model, requiring additional research or ordering time.

7. **Potential for Misalignment During Installation** If not installed correctly, the lock cylinder could bind or fail to engage properly. This requires careful attention to alignment with the ignition switch housing.

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### **Conclusion**

The **PY Classic Locks TK157** is an excellent choice for owners of **1951 1964 GM vehicles** who prioritize **authenticity, security, and durability**. It is the most accurate replacement available for this era, ensuring proper function and fit while maintaining the original vehicle s integrity. The octagon keyway adds a layer of security that is harder to bypass than modern, mass-produced locks.

However, if you are not working on a classic GM car or need a lock that fits a broader range of vehicles, the **pros may not outweigh the cons**. For modern vehicles or non-GM classics, a universal ignition lock cylinder might be a more practical (though less authentic) alternative.

### **Recommendation**

- You own a **1951 1964 GM vehicle** (Chevrolet, Pontiac, Buick, Oldsmobile, etc.).

- You value **authenticity** and want to preserve the original ignition system.

- You are willing to **duplicate the octagon key** and maintain it properly.

- You do not require **electronic immobilizer compatibility**.

- You are working on a **non-GM vehicle** or a car from a different era.

- You need a **universal lock** that fits multiple vehicles.

- You plan to add **modern security systems** that require electronic ignition integration.

- You are uncomfortable with the **key loss risks** associated with the octagon keyway.

For most **classic GM enthusiasts**, this is a **highly recommended purchase** due to its reliability and historical accuracy. For everyone else, a **universal ignition lock cylinder** may be a more versatile option.

Details:

This lock cylinder features 2 holes in the bezel. 1951-64 GM; Ignition Lock Cylinder; With Replacement Octagon Key; Without GM Logo: Replace your ignition lock cylinder with a replacement keys. Application Summary:1953-64 Corvette1951-54 Chevy Full Size1955-57 Bela Air1958-64 Impala1962-64 Nova / II1964 Chevelle1961-64 Corsair.

part #: tk157 prices

• $32.95-$350.00

specifications carlockiio:

• for years: 1951-64
• brand: Py Classic Locks
• mpn: Tk157
• part type: Ignition Lock Cylinder

offer carlockiio:

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

general carlockiio:

• Car Truck Parts Accessories > Exterior Parts Accessories > Exterior Locks Lock Hardware
• condition: New

payments carlockiio:

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

returns carlockiio:

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

seller carlockiio:

• city: Huntington Beach, California
• # reviews: 43839
• rating: 99.6%

shipping carlockiio:

• carrier: USPS, UPS, FedEx
• transit: 4-9 Days
• service: USPS Ground Advantage, UPS Ground, UPS 2nd Day Air, FedEx Ground / FedEx Home Delivery
• cost: $7.88
• class: Standard, Expedited
• type: Calculated

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