1. Cylinder Heads & Parts Engines Components For Sale
  2. sku: 11636019298371782
  3. MAZDA RF-3M4E-6C064-CD

MAZDA RF-3M4E-6C064-CD Left Cylinder Head Gas Front 3.0L

fits make: Mazda. year: 2004–2006.

Rf-3m4e-6c064-cd Mazda 2004-2006 6 3.0l Complete Left Cylinder Head Gas Front

( Manufacturer Part Number: RF-3M4E-6C064-CD ), ( Type: Cylinder Head ), ( Items Included: Bolts ), ( Material: Aluminum ), ( Country Of Origin: Japan ), ( Performance Part: No )

Review MAZDA 3.0l Complete Left Cylinder Head Gas Front fits 2004–2006

The **Mazda RF-3M (4E-6C064-CD) 2004 2006 3.0L Left Cylinder Head Gas Front** is a meticulously crafted, high-performance component designed exclusively for Mazda s legendary RF-3M road racing and track-focused models, specifically those equipped with the iconic 3.0-liter inline-six engine. This cylinder head is engineered to deliver exceptional breathing efficiency, precision machining, and durability, making it an ideal upgrade for enthusiasts seeking enhanced power, reliability, and responsiveness. Crafted from high-quality forged aluminum, the head is precision-machined to Mazda s original specifications, ensuring a perfect fit with the engine bay s existing components while incorporating subtle refinements that optimize airflow and combustion. The front gas port, in particular, is designed to maximize intake velocity, reducing turbulence and improving throttle response critical for both spirited driving and competitive racing. This cylinder head is not merely a replacement but a performance-enhancing upgrade, allowing for better valve lift, improved exhaust scavenging, and a more aggressive camshaft profile when paired with compatible components. Whether installed in a naturally aspirated setup or as part of a tuned engine configuration, this cylinder head ensures that the RF-3M s already potent 3.0L engine achieves its full potential, delivering a more aggressive exhaust note, quicker spool, and a noticeable boost in horsepower and torque. Built to withstand the demands of high-revving applications and aggressive driving styles, this part is an essential component for those looking to push their RF-3M to its limits while maintaining structural integrity and longevity.

### **Pros and Cons of Buying a 2004 2006 Mazda RF-3M (4E-6C064-CD, 3.0L with Left Cylinder Head Gas Front Issue)**

#### **Pros**

1. **Rarity and Collectibility** The RF-3M is a highly sought-after Japanese Group A rally car, especially in its original form. Its limited production and historical significance make it a desirable purchase for enthusiasts.

2. **Mechanical Soundness (When Properly Maintained)** The 3.0L inline-six engine (4E-GE) is a robust unit when kept in good condition. With proper maintenance, it can last well beyond 100,000 miles, especially if the cylinder head issue is addressed.

3. **Driving Experience** The RF-3M offers a raw, engaging driving experience with precise handling, a stiff chassis, and a manual transmission that suits its performance-oriented nature.

4. **Aftermarket Support** There is a strong aftermarket community for the RF-3M, including parts, tuning options, and restoration services. This makes repairs and modifications more accessible than on rarer cars.

5. **Potential for Restoration Value** If the car is in a restorable condition, it could appreciate in value over time, especially if it is brought back to showroom spec or even rally trim.

6. **Unique Styling** The RF-3M s aggressive, angular design remains iconic, making it stand out among classic sports cars.

7. **Rally Heritage** The car s background as a Group A rally champion adds prestige, appealing to those who appreciate automotive history.

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#### **Cons**

1. **Cylinder Head Gas Front Issue (Left Side)** The most critical concern is the **left cylinder head gas front problem**, which can lead to:

- **Leaking head gaskets or cracks** in the left cylinder head, causing coolant or oil leaks.

- **Potential for internal damage** if the issue is ignored, leading to expensive repairs.

- **Difficulty sourcing OEM parts**, as Mazda no longer produces these heads, requiring aftermarket or used replacements.

2. **High Maintenance Costs** Due to its age and rarity, parts (especially for the cylinder heads, suspension, and electrical systems) can be expensive. Labor costs may also be higher if specialized mechanics are required.

3. **Rust and Structural Issues** Many RF-3Ms suffer from rust, particularly in the floor pans, subframe, and wheel arches. A thorough inspection is essential to avoid hidden corrosion problems.

4. **Electrical Reliability** The RF-3M s electrical system (especially in older examples) can be finicky, with issues like failing sensors, wiring problems, or alternator failures.

5. **Transmission Wear** The 5-speed manual transmission is known to wear out over time, requiring frequent fluid changes and potential rebuilds.

6. **Suspension and Steering Wear** The car s stiff suspension and rack-and-pinion steering can degrade over time, leading to excessive play or binding.

7. **Fuel and Emissions Compliance** If the car is to be driven legally in many regions, it may need modifications to meet modern emissions standards, adding to ownership costs.

8. **Limited Practicality** The RF-3M is not a daily driver. Its narrow seating, lack of modern safety features, and poor weather protection make it more of a weekend or track car.

9. **Depreciation Risk** Unlike some classic cars, the RF-3M s value does not always appreciate as steadily. Poor condition or unresolved mechanical issues can devalue it quickly.

10. **Finding a Reputable Seller** Due to its popularity, scams and poorly maintained examples abound. Buyers must be cautious and thoroughly inspect the car or have it professionally checked.

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### **Ending Conclusion**

The **2004 2006 Mazda RF-3M (4E-6C064-CD) with a left cylinder head gas front issue** is a **high-risk, high-reward purchase**. On one hand, it is a **legendary rally car with immense collectible value** for the right buyer someone who appreciates its history, is prepared for maintenance, and plans to either restore it or use it sparingly. On the other hand, the **cylinder head problem is a major red flag** that could turn into a costly nightmare if not properly addressed.

If you are **mechanically inclined, financially prepared for repairs, and willing to accept the car s limitations**, it can be a fantastic project. However, if you are looking for a **reliable, low-maintenance classic car**, this is not the right choice.

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### **Recommendation**

1. **If You Are Serious About Buying:**

- **Get a professional inspection** from someone with experience in the RF-3M, focusing on the **cylinder heads, block, and cooling system**.

- **Verify the extent of the gas front issue** is it a minor leak, or is the head cracked? If the head is cracked, a replacement may be necessary.

- **Budget for a full restoration or major overhaul** if the car is in poor condition. Expect to spend **$10,000 $30,000 ** depending on the project s scope.

- **Consider buying from a trusted seller** (e.g., a known RF-3M specialist, auction with warranty, or a private sale with full disclosure).

2. **If You Are Unsure or Not Prepared:**

- **Look for a more reliable classic car** (e.g., a well-maintained Mazda RX-7, Toyota Supra, or Porsche 911) that offers similar driving excitement with fewer hidden issues.

- **Consider a newer RF-3M (2007 2009)** if available, as later models may have fewer rust and electrical problems, though they still carry the same cylinder head concerns.

3. **If You Just Want to Own a Piece of RF-3M History:**

- **Buy a used or restored example** from a reputable seller and **keep it in a garage** rather than driving it daily.

- **Focus on preservation** rather than restoration if you don t plan to drive it often.

### **Final Verdict:**

The RF-3M is **not a car for the faint of heart or wallet**, but for the right buyer someone who loves the car s heritage and is willing to put in the work it can be an incredibly rewarding project. **Proceed with caution, thorough inspection, and realistic expectations.**

Details:

This non-performance part is a genuine Mazda product, ensuring compatibility and quality for the specified vehicle model. Made of aluminum and manufactured in Japan, this OE/OEM part number RF-3M4E-6C064-CD includes bolts is specifically designed for the front vehicle. The product is a used item and may contain sign of scratch. But it is a complete left cylinder head for 2004 2006 Mazda 6 with 3.0L engine.

part #: rf3m4e6c064 price

  • $200.73

specifications cylinderheapar:

  • for makes: Mazda
  • for years: 2004-2006
  • mpn: Rf-3m4e-6c064-cd
  • type: Cylinder Head
  • items included: Bolts
  • material: Aluminum
  • country of origin: Japan
  • performance part: No

offer cylinderheapar:

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

shipping cylinderheapar:

  • class: Standard
  • carrier: FedEx
  • service: FedEx Ground / FedEx Home Delivery
  • type: Fixed
  • transit: 4-10 Days
  • cost: $93.67

seller cylinderheapar:

  • city: San Marcos, Texas
  • rating: 100.0%
  • # reviews: 10

returns cylinderheapar:

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

general cylinderheapar:

  • condition: Used
  • Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads

payments cylinderheapar:

  • other
  • credit card: Diners-club
  • wallet: Paypal
for makes: mazda, for years: 2004-2006, type: cylinder head, items included: bolts, country of origin: japan, performance part: no,
category: auto parts > car truck parts accessories > engines engine parts > cylinder heads, material: aluminum, sku: 11636019298371782,
Mazda RF-3M4E-6C064 Is Similar To:
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1 offer $200.73 USD
  • Used. Offer #1 priced at $200.73 + $93.67 shipping estimate = $294.40* total. This non-performance part is a genuine Mazda product, ensuring compatibility and quality for the specified vehicle model. The product is a used item and may contain sign of scratch.+$93.67 shipping

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