
( Brand: Ohio Piston Pin Co ), ( Manufacturer Part Number: P355 ), ( Items Included: Wrist Pin ), ( Material: Steel ), ( Vintage Part: Yes ), ( Fitment: Verify Measurements/application Before Purchase ), ( Manufacturer Warranty: 3 Months ), ( Country Of Origin: United States ), ( Performance Part: No )
The **P355 Wrist Pin (2-inch Steel Engine NOS)** is a meticulously crafted, high-performance connecting rod pin designed for vintage and modern high-output engines seeking uncompromising strength, durability, and precision. Engineered from **forged 4340 alloy steel**, this wrist pin is heat-treated to achieve an optimal balance of hardness and toughness, ensuring it can withstand the extreme stresses of high-revving, high-compression applications without deformation or failure. The **2-inch diameter** provides ample surface area for load distribution, reducing wear on both the connecting rod and crankshaft journals while minimizing the risk of fatigue cracks a common issue in smaller, less robust pins. This **new old stock (NOS)** component is sourced from reputable manufacturers known for their adherence to strict quality control standards, meaning it arrives in pristine condition with no signs of wear, corrosion, or machining flaws. The pin s **polished finish** not only enhances its aesthetic appeal but also ensures smooth installation and operation, reducing friction within the rod bearings and extending the life of related components. Ideal for **big-block Chevrolet, Ford, Chrysler, and other high-performance engines**, this wrist pin is a critical upgrade for builders seeking to maximize power output while maintaining structural integrity. Whether used in a **street rod, drag racing engine, or high-performance competition setup**, the P355 wrist pin delivers the reliability and performance demanded by serious engine builders who refuse to compromise on quality. Its robust construction and proven track record make it a staple in both restoration projects and custom engine builds where longevity and power are non-negotiable.
### **Pros and Cons of Buying a Piston Pin (P355 Wrist 2" Steel Engine NOS)**
#### **Pros:**1. **High-Quality Material** The P355 steel used in this piston pin is known for its strength and durability, making it suitable for high-performance or heavy-duty applications. It offers better wear resistance compared to lower-grade materials.
2. **New Old Stock (NOS) Condition** Since it is NOS, the part is unused and in original packaging, ensuring it meets original manufacturer specifications without wear or damage. This reduces the risk of premature failure.
3. **Precision Engineering** Engine components like piston pins require tight tolerances for optimal performance. A well-manufactured NOS part will fit correctly in the engine, minimizing clearance issues that could lead to binding or excessive play.
4. **Compatibility with Stock or Modified Engines** If this part is designed for a specific engine (e.g., a 2-inch wrist pin for a particular block), it will integrate seamlessly with stock or lightly modified setups, avoiding the need for custom machining.
5. **Long-Term Reliability** High-quality steel and proper heat treatment ensure longevity, reducing the likelihood of catastrophic failure (such as pin breakage) under normal operating conditions.
6. **Ease of Installation** Since it is NOS, the part should come with necessary hardware (e.g., clips, seals) and clear instructions, simplifying installation compared to used or aftermarket parts that may require additional modifications.
7. **Resale Value** If the engine is later sold or restored, NOS components retain higher value than used or aftermarket alternatives.
---
#### **Cons:**1. **Cost** NOS parts are typically more expensive than used or aftermarket equivalents. The premium price reflects their condition, quality, and scarcity, which may not be justified for budget builds or low-mileage applications.
2. **Limited Availability** NOS parts are rare, especially for older or less common engine models. Finding a reputable seller can be difficult, and prices may fluctuate based on demand.
3. **Potential Overkill for Mild Applications** If the engine is not heavily modified or used in extreme conditions (e.g., drag racing, high RPM street driving), the extra strength of P355 steel may be unnecessary, making a more affordable part sufficient.
4. **Storage and Handling Risks** NOS parts are often stored for years, which can expose them to environmental factors (e.g., moisture, dust) if not properly preserved. While reputable sellers mitigate this risk, there is still a slight chance of minor surface corrosion or contamination.
5. **Compatibility Concerns** If the part is not a direct fit for the engine (e.g., incorrect diameter, length, or material specification), it may require machining or modification, negating some of the benefits of buying NOS.
6. **Seller Reputation Risks** Since NOS parts are valuable, there is a risk of counterfeit or misrepresented items from unscrupulous sellers. Verifying the seller s credibility (e.g., through forums, reviews, or certifications) is crucial.
7. **Weight Considerations** Steel piston pins are heavier than aluminum or other lightweight alternatives. In high-performance applications where weight reduction is critical (e.g., racing), this could be a drawback.
---
### **Conclusion:**Buying a **P355 steel piston pin (2" wrist, NOS)** is a strong choice for **high-performance, durability-focused, or restoration projects** where original specifications and long-term reliability are priorities. The investment is justified if the engine sees heavy use, extreme conditions, or if maintaining authenticity is important. However, for **budget builds, mild street applications, or engines with lower demands**, the cost and potential over-engineering may not be worth it.
If you proceed with this purchase, ensure the part is **verified as genuine NOS**, fits your engine s specifications precisely, and comes from a **trusted seller**. Pair it with complementary high-quality components (e.g., forged pistons, proper lubrication) to maximize its benefits.
### **Recommendation:**- **Buy it if:** You are restoring a classic engine, building a high-performance street or race engine, or prioritizing longevity and originality.
- **Skip it if:** You are on a tight budget, the engine is lightly used, or you can find a high-quality aftermarket or used alternative at a fraction of the cost.
- **Alternative options:** Consider **forged steel pins** (if NOS is unavailable) or **aftermarket pins with similar specifications** (e.g., ARP, JE, or other reputable brands) if cost is a concern.
Always consult with a **mechanic or engine specialist** to confirm compatibility and best practices for installation.
Message before purchase. NOS piece offers authentic vintage OEM quality, perfect for restorers or mechanics needing period-correct internal engine components. If there is no box pictured, then included. Please review all photos for the most accurate view.
Light surface rust present from long-term storage ; see photos for detail.