FORD OEM C30Z-C306-A Hipo Crankshaft Sprocket Nos 289

( Brand: Ford Oem ), ( Manufacturer Part Number: C30Z-C306-A ), ( Part Type: Crankshaft Sprocket ), ( Vintage Part: No ), ( Country Of Origin: United States ), ( Performance Part: Yes )

Review FORD OEM 289 Hipo Crankshaft Sprocket Nos In Original Packaging

The **Ford C30Z-C306-A 289 High-Performance (Hipo) Crankshaft Sprocket (NOS New Old Stock)** is a meticulously crafted, high-quality replacement part designed exclusively for Ford s legendary **289 cubic-inch V8 engine**, particularly those built for performance and durability. This sprocket is a **direct replacement** for the original equipment (OEM) component found on early **C30-series engines**, including those used in iconic models like the **Fairlane, Thunderbird, and Mustang** from the late 1950s through the early 1960s. Engineered from **high-strength forged steel**, this sprocket is precision-machined to exacting tolerances, ensuring seamless integration with the **Hipo (High Performance) crankshaft**, which was a standard upgrade for engines intended for racing, drag racing, or high-revving street applications. The **C30Z-C306-A designation** indicates its compatibility with both **C30 and C306 engine variants**, making it a versatile choice for restorers, hot rodders, and enthusiasts seeking to restore or enhance the performance of their classic Ford V8. Unlike modern aftermarket alternatives, this **NOS sprocket retains its original factory specifications**, including the correct **bolt pattern, keyway alignment, and bearing surface finish**, which are critical for maintaining proper timing chain tension and engine reliability. Whether installed in a **restored show car, a high-performance street machine, or a competition engine**, this sprocket delivers the authenticity and performance expected from a genuine **Ford C30-series component**, ensuring smooth operation and longevity under demanding conditions. For collectors and purists, its **new-old-stock condition** guarantees that it has never been installed or used, preserving its original factory quality and making it an ideal choice for those who demand nothing less than perfection in their restoration projects.

Buying a **Ford C30Z/C306 289 cubic inch high-performance crankshaft sprocket** (also known as a "nos" or nitrous sprocket) involves several considerations, as it is a performance modification aimed at improving engine performance, particularly for forced induction applications. Below are the key pros and cons, followed by a conclusion and recommendation.

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### **Pros of Buying a High-Performance Crankshaft Sprocket**

1. **Increased Engine Speed (RPM) Limits**

The stock crankshaft sprocket is often a limiting factor in high-RPM applications, especially with nitrous oxide (nos) or forced induction (turbo/supercharger). A performance sprocket reduces the gear ratio, allowing the engine to rev higher before reaching the mechanical redline. This can improve throttle response and power output, particularly in high-stress situations like nitrous burns or turbo spool-up.

2. **Compatibility with Forced Induction**

When running nitrous or a turbo/supercharger, the engine operates under increased stress, and the stock sprocket may not handle the additional RPMs or torque spikes. A performance sprocket helps mitigate this by extending the usable RPM range, reducing the risk of catastrophic failure (e.g., bent valves, rod knock, or camshaft issues).

3. **Potential for Better Fuel Efficiency (Indirectly)**

In some cases, a higher-revving engine can achieve better fuel efficiency due to improved combustion efficiency and reduced parasitic losses (e.g., less time spent at low RPMs where engines are less efficient). However, this is situational and depends on the engine s tuning and application.

4. **Customization and Tuning Flexibility**

A performance sprocket allows for finer tuning of the engine s RPM range. Mechanics and tuners can optimize the engine s powerband to suit specific applications, whether for drag racing, street driving, or track use. This can lead to a more refined power delivery curve.

5. **Reduced Strain on Drivetrain Components**

In high-RPM scenarios, the stock sprocket can cause excessive wear on the camshaft, lifters, and other internal components. A performance sprocket reduces this strain by allowing the engine to operate within safer RPM parameters for longer durations.

6. **Potential for Increased Horsepower (With Proper Tuning)**

While the sprocket itself does not directly increase horsepower, it enables the engine to reach higher RPMs where more power can be extracted with the right camshaft, ignition timing, and fuel delivery. This is particularly useful when paired with a high-performance camshaft or nitrous setup.

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### **Cons of Buying a High-Performance Crankshaft Sprocket**

1. **Increased Risk of Mechanical Failure**

Revving an engine beyond its original design limits even with a performance sprocket can lead to premature wear or failure of critical components. Issues such as bent valves, rod knock, or camshaft damage can occur if the engine is not properly supported with upgraded parts (e.g., stronger rods, pistons, connecting rods, or a high-performance camshaft).

2. **Requires Additional Modifications**

- Upgraded valve springs and retainers (to handle higher RPMs).

- A high-performance camshaft (to match the increased RPM range).

- Reinforced connecting rods and pistons (to handle additional stress).

- Upgraded ignition system (to ensure proper timing at higher RPMs).

- Tuning adjustments (to optimize fuel delivery and ignition timing).

Without these, the benefits of the sprocket may be outweighed by the risks.

3. **Potential for Voiding Warranty**

If the engine is still under warranty, installing a performance sprocket (or any non-OEM part) may void the warranty, especially if the manufacturer considers it an "aftermarket modification" that alters the engine s original specifications.

4. **Cost of Additional Parts**

To safely utilize a performance sprocket, you may need to invest in other high-performance components, which can add significant cost. For example, a high-performance camshaft, upgraded valvetrain, and tuning can easily cost hundreds or thousands of dollars beyond the cost of the sprocket itself.

5. **Learning Curve for Tuning**

Higher RPMs require precise tuning to avoid issues like detonation, lean conditions, or excessive wear. This may involve working with a professional tuner or spending time learning how to adjust fuel maps, ignition timing, and other parameters. Poor tuning can negate the benefits and even cause damage.

6. **Not Always Necessary for Mild Applications**

If you are not running nitrous, a turbo, or aggressive camshafts, the stock sprocket may suffice. For street-driven engines or mild performance builds, the benefits of a performance sprocket may not justify the cost or risk.

7. **Potential for Drivetrain Issues**

In vehicles with manual transmissions, a higher-revving engine can cause the transmission to shift poorly or wear out faster if the gearing is not optimized. Some drivers may need to adjust their driving style or consider a closer-ratio transmission to complement the sprocket.

---

### **Conclusion**

A **Ford C30Z/C306 289 high-performance crankshaft sprocket** is a valuable modification for engines running nitrous, forced induction, or high-performance camshafts. It extends the usable RPM range, improves throttle response, and can enhance power delivery when paired with the right supporting components. However, it is not a standalone solution it requires additional upgrades to the valvetrain, ignition, and fuel system to avoid mechanical failure.

For **street-driven engines or mild performance builds**, the stock sprocket is likely sufficient, and the risks of upgrading may not be worth the benefits. For **serious performance applications** (e.g., nitrous, turbo, or aggressive camshafts), the sprocket can be a worthwhile investment if you are prepared to commit to the full package of necessary modifications.

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### **Recommendation**

- If you are running nitrous, a turbo, or a high-performance camshaft, a performance sprocket is likely beneficial.

- If your engine is stock or mildly modified, the stock sprocket may be adequate.

- Before purchasing, consult someone experienced with Ford 289 engines to ensure the sprocket is compatible with your specific build and that you understand the risks.

- They can help determine if additional parts (e.g., camshaft, valvetrain, ignition) are needed.

- If you decide to upgrade, allocate funds for a high-performance camshaft, upgraded valvetrain, and proper tuning. Cutting corners here can lead to costly failures.

- Opt for a reputable brand (e.g., Crane, JE, or Ford Performance Parts) to ensure quality and compatibility.

- After installation, pay close attention to engine behavior, oil pressure, and unusual noises. Address any issues promptly to prevent damage.

- If you have a manual transmission, evaluate whether a closer-ratio set or a performance transmission (e.g., Tremec T-18 for later Mustangs) would complement the higher RPMs.

For **high-performance applications**, the **Ford C30Z/C306 289 high-performance crankshaft sprocket is a useful upgrade** when paired with the proper supporting modifications. For **stock or mildly modified engines**, it is unnecessary and may introduce risks without significant benefits. Always prioritize safety and consult professionals to ensure the modification aligns with your engine s capabilities.

Details:

You are buying on a nos 289 hi-po k-code 350 Shelby.decent box getting harder to find.my last one.

part #: c30zc306 prices

• $35.00-$199.25

specifications cranshafengin:

• for makes: Ford
• brand: Ford Oem
• mpn: C30z-c306-a
• part type: Crankshaft Sprocket
• vintage part: No
• country of origin: United States
• performance part: Yes

payments cranshafengin:

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

general cranshafengin:

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

seller cranshafengin:

• # reviews: 246
• rating: 100.0%
• city: Le Roy, Illinois

returns cranshafengin:

• policy: No Returns

offer cranshafengin:

• quantity: 1
• sold: 0
• availability: In Stock
• options: Ship-to-home
• started: March 11, 2026

shipping cranshafengin:

• carrier: USPS
• type: Calculated
• service: USPS Ground Advantage
• transit: 5-10 Days
• cost: $7.31
• class: Standard

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