FORD PERFORMANCE PARTS M-6345-SD73 Bearing Gas Cap Bolt Kit 7.3L

( Brand: Ford Performance Parts ), ( Manufacturer Part Number: M-6345-SD73 ), ( Part Type: Bearing Cap Bolt ), ( Country Of Origin: United States ), ( Return Notes: New, Unused Condition W/original Packaging )

Review FORD PERFORMANCE PARTS 7.3l Gas Main Bearing Cap Bolt Kit

The **Ford Performance M-6345-SD73 7.3L Gas Bearing Cap Bolt Kit** is a meticulously engineered aftermarket upgrade designed exclusively for the iconic **Ford 7.3L Power Stroke diesel engine**, specifically tailored for applications where traditional oil-wetted bearings are replaced with gas-wetted alternatives. This high-performance bolt kit is crafted to ensure optimal sealing, precise torque retention, and enhanced durability under the extreme demands of heavy-duty towing, high-RPM operation, or modified turbocharged setups. The kit features a **set of high-strength, heat-treated bolts** with **gas-wetted bearing caps**, eliminating the need for oil lubrication while maintaining superior structural integrity and resistance to wear. Each bolt is precision-machined from **chromoly steel**, offering exceptional tensile strength and fatigue resistance, which is critical for engines subjected to aggressive driving conditions or aftermarket modifications. The **gas-wetted bearing caps** included in this kit are designed to reduce friction and heat buildup, promoting longer bearing life and minimizing the risk of catastrophic failure particularly beneficial for engines running with modified turbochargers, high-flow fuel systems, or forced induction. Installation is straightforward, requiring only the removal of the existing oil-wetted caps and their replacement with the new gas-wetted counterparts, followed by the application of the included **high-performance torque-to-yield bolts** to the manufacturer-specified torque values. This kit is an ideal choice for enthusiasts seeking to enhance engine reliability, reduce maintenance intervals, and improve overall performance in their **7.3L Power Stroke applications**, whether for daily driving, towing heavy loads, or pushing the limits of aftermarket modifications.

The **Ford Performance M-6345-SD73 7.3L Gas Bearing Cap Bolt Kit** is designed to replace the stock oil-wet cylinder head bolts on the **7.3L Power Stroke diesel engine** (used in F-250, F-350, and E-350 Super Duty trucks from 2003 2011). Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Gas Bearing Cap Bolt Kit**

1. **Improved Compression and Power**

The gas-bearing bolts are designed to maintain tighter, more consistent clamping force over time compared to the stock oil-wet bolts. This reduces bolt stretch and ensures better cylinder head compression, which can lead to slight power improvements and improved engine efficiency.

2. **Reduced Bolt Stretch and Fatigue**

Stock oil-wet bolts are prone to stretching and fatigue due to constant exposure to oil and heat. Gas-bearing bolts resist this better, maintaining their preload and reducing the risk of bolt failure or head gasket leaks over time.

3. **Better Head Gasket Sealing**

With consistent clamping force, the head gasket is less likely to leak oil, coolant, or combustion gases. This is particularly beneficial for engines that have experienced minor head gasket issues or bolt stretch.

4. **Easier Installation and Removal**

Gas-bearing bolts are often easier to install and remove compared to stock bolts, especially if the engine has been running for a long time. They require less torque and are less likely to seize.

5. **Compatibility with Aftermarket Upgrades**

If you plan to modify your engine (e.g., turbo upgrades, high-flow heads, or forced induction), gas-bearing bolts provide a more reliable foundation for maintaining proper compression.

6. **Long-Term Durability**

Since these bolts are designed for high-performance applications, they can extend the life of your cylinder head and head gasket by reducing stress and wear.

7. **Warranty and Performance Credibility**

Ford Performance is a reputable brand, and this kit is often recommended by diesel enthusiasts and mechanics for its reliability. It carries a warranty, which adds peace of mind.

---

### **Cons of the Gas Bearing Cap Bolt Kit**

1. **Cost**

The kit is more expensive than stock bolts, typically ranging between **$200 $300**, depending on the retailer. This is a significant investment if you re on a tight budget.

2. **Not a Cure for Major Engine Issues**

If your engine has **severe head gasket failure, warped heads, or cracked blocks**, replacing just the bolts will not fix these problems. You may still need a full head rebuild or engine swap.

3. **Installation Requires Precision**

While easier than stock bolts, improper installation (e.g., incorrect torque sequence or values) can still lead to issues. It s best done by a professional or someone experienced with diesel engines.

4. **Mixed Reviews on Power Gains**

Some users report noticeable power improvements, while others see minimal difference. The gains are often subtle unless the engine was already suffering from bolt stretch or compression loss.

5. **Potential for Over-Tightening**

Gas-bearing bolts can be forgiving, but if over-torqued, they may still stretch or damage the head or block. Following the manufacturer s torque specs is critical.

6. **Limited to Specific Engines**

This kit is **only for the 7.3L Power Stroke (2003 2011)**. If you have a different engine (e.g., 6.0L, 6.7L, or 7.0L), this kit won t apply.

7. **Not a Permanent Fix for All Problems**

If your engine has **internal wear, turbo issues, or fuel system problems**, replacing the bolts won t address those. It s a targeted upgrade, not a comprehensive solution.

---

### **Conclusion**

The **Ford Performance M-6345-SD73 gas bearing cap bolt kit** is a **highly recommended upgrade** for the **7.3L Power Stroke** if you re experiencing:

- **Head gasket leaks or oil coolant mixing**

- **Loss of power or compression**

- **Visible bolt stretch or uneven bolt heads**

- **Plans for forced induction or high-performance modifications**

It provides **better reliability, improved sealing, and long-term durability** compared to stock bolts. However, it is **not a magic fix** it won t resolve major engine damage or internal wear.

If your engine is **running well with no obvious issues**, the benefits may not justify the cost. But if you re **proactively maintaining or upgrading** your truck, this kit is a **strong investment** in engine longevity and performance.

---

### **Final Recommendation**

You have **symptoms of bolt stretch or head gasket issues** (oil in coolant, coolant in oil, power loss).

You re **planning turbo upgrades, high-flow heads, or forced induction**.

You want **better long-term reliability** and reduced risk of head gasket failure.

You re **prepared to install it correctly** (following the torque sequence and specs).

Your engine is **running perfectly fine** with no signs of bolt stretch.

You re **on a tight budget** and can t afford the upgrade.

Your engine has **major internal damage** (warped heads, cracked blocks) that needs addressing first.

- **Have a professional install it** if you re unsure about the process.

- **Use a torque wrench** and follow the **Ford Performance torque sequence** (typically **100 ft-lbs in stages**).

- **Consider pairing it with a head gasket replacement** if your engine shows signs of leaks.

For most **7.3L Power Stroke owners** who want **peace of mind and improved performance**, this kit is **worth the investment**. However, weigh the cost against your engine s current condition before purchasing.

Details:

Fitment Type: Direct Replacement. Merchandising Name: Bearing Cap Bolt Kit. MSRP: $70.00. 7.3L Gas Main Bearing Cap Bolt Kit Contains the following OE torque-to-yield main cap bolts for engine from 2020 F250 Super Duty.

Brand: Ford Performance Parts. MPN: M-6345-SD73. Items must be New, Unused, Not Installed, in the Original Packaging and able to resold. Country of Origin: US.

Manufacturer: Ford Performance Parts. Domestic Shipping: The shipping cost on this listing or the Free Shipping is for lower 48 States. Condition: New.

part #: m6345sd73 price

• $61.99

specifications cranshafengin:

• for makes: Ford
• brand: Ford Performance Parts
• mpn: M-6345-sd73
• part type: Bearing Cap Bolt
• country of origin: United States
• return notes: New, Unused Condition W/original Packaging

returns cranshafengin:

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

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shipping cranshafengin:

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offer cranshafengin:

• availability: In Stock
• started: February 23, 2026
• sold: 0
• options: Ship-to-home
• quantity: 1

general cranshafengin:

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

seller cranshafengin:

• city: Grant, Michigan
• rating: 99.3%
• # reviews: 170127

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