1. Cylinder Heads & Parts Engines Components For Sale
  2. sku: 11651746500771782
  3. MAZDA RF-3M4E-6090-CD

MAZDA RF-3M4E-6090-CD Engine Cylinder Head 3.0L

fits make: Mazda. year: 2003–2008.

Rf-3m4e-6090-cd Mazda 2003-08 6 3.0l Engine Cylinder Head Remanufactured

( Manufacturer Part Number: RF-3M4E-6090-CD ), ( Type: Cylinder Head ), ( Items Included: Bolts ), ( Material: Aluminum ), ( Country Of Origin: Japan ), ( Performance Part: No )

Review MAZDA 3.0l Engine Cylinder Head Remanufactured fits 2003–2008

The **Mazda RF-3M (M4E) 2003 2008 3.0L Engine Cylinder Head (Part #6090-CD)** is a high-performance, precision-engineered component designed to deliver exceptional reliability and power output for Mazda s legendary rotary-powered sports car. Crafted from high-grade aluminum alloy, this cylinder head is engineered to withstand the extreme thermal and mechanical stresses inherent in the Wankel rotary engine, ensuring optimal combustion efficiency and longevity. The head features a meticulously machined combustion chamber geometry tailored to maximize performance while maintaining smooth operation, a hallmark of Mazda s rotary engineering legacy. Its robust construction includes precision-cast passages for efficient air and fuel distribution, contributing to the characteristic smooth yet exhilarating power delivery that the RF-3M is renowned for. This cylinder head is compatible with the M4E engine variant, which powers the RF-3M from 2003 through 2008, and is a critical component for maintaining the vehicle s original performance characteristics or restoring it to factory specifications. Whether used in a restoration project, a performance upgrade, or as a replacement for wear and tear, this cylinder head exemplifies Mazda s commitment to innovation and engineering excellence in rotary engine technology. Its compatibility with aftermarket modifications also makes it a versatile choice for enthusiasts looking to enhance their RF-3M s power output while preserving its iconic sound and driving dynamics.

Buying a used Mazda RF-3 (specifically the M4E-6090-CD model from 2003 2008 with a 3.0L engine) involves several considerations, particularly due to its specialized nature as a track-focused race car. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros of Buying a Used Mazda RF-3 (M4E-6090-CD, 2003 2008, 3.0L Engine)**

1. **Performance and Driving Experience**

The RF-3 is a purpose-built race car with a lightweight chassis, aggressive aerodynamics, and a high-revving 3.0L inline-six engine (derived from the RX-7 FD3S but tuned for track use). It delivers exhilarating handling, precise steering, and a linear powerband, making it ideal for track days and autocross. The M4E-6090-CD variant is one of the more refined models, with improved suspension tuning and reliability over earlier iterations.

2. **Track-Oriented Design**

The RF-3 is stripped of unnecessary weight and features race-specific components like a limited-slip differential, reinforced chassis, and a rear-wheel-drive layout optimized for cornering. This makes it far more capable on track than a street-legal RX-7 or Miata, though it lacks some comfort and convenience features.

3. **Strong Community and Support**

The Mazda RF-3 has a dedicated following, with aftermarket parts, tuning resources, and a community of enthusiasts who share knowledge. This includes support for engine builds, suspension upgrades, and even track-specific modifications. Mazda also produced the RF-3 in limited numbers, so finding parts or a compatible car is easier than with rarer models.

4. **Potential for Modifications**

The 3.0L engine (based on the FD3S) is known for its durability and potential for power increases through forced induction or naturally aspirated tuning. The chassis is also modular, allowing for upgrades like stiffer suspension, larger brakes, or aerodynamic tweaks. This makes the RF-3 a platform for enthusiasts who want to push performance further.

5. **Resale Value and Collectibility**

While not as valuable as a stock RX-7 or Miata, the RF-3 holds a niche appeal among track-focused Mazda fans. Well-maintained examples with original components or track pedigree can appreciate over time, especially if production numbers remain low.

6. **Legal Compliance (If Street-Legal)**

If the car is street-legal (with DOT-approved tires, lights, and emissions compliance), it can be driven legally on public roads, though insurance may be expensive due to its specialized nature. Some RF-3s are sold as "track-only" cars, which simplifies ownership but limits usability.

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### **Cons of Buying a Used Mazda RF-3 (M4E-6090-CD, 2003 2008, 3.0L Engine)**

1. **High Cost of Ownership**

The RF-3 is not a budget-friendly car. Parts, especially rare or aftermarket components, can be expensive. Labor costs may also be higher due to the car s specialized nature. Insurance premiums will likely be steep, as insurers classify it as a high-performance or modified vehicle.

2. **Maintenance Complexity**

While the 3.0L engine is robust, it requires regular maintenance, including valve adjustments (if not using hydraulic lifters), timing chain inspection, and cooling system upkeep. The car s lightweight construction means it s more susceptible to damage from rough handling or track use. Suspension components, brakes, and tires will also need frequent attention.

3. **Limited Comfort and Practicality**

The RF-3 is not designed for daily driving. It lacks features like power steering, power windows, or a comfortable interior. The open cockpit and minimal sound insulation make it noisy and exposed to the elements. Storage space is minimal, and fuel efficiency is poor (expect around 12 15 MPG in mixed driving).

4. **Track-Specific Limitations**

Even if the car is street-legal, its performance is optimized for the track. On the road, the lack of stability at high speeds, poor visibility due to the low windshield, and limited traction control (if any) can make it challenging to drive safely. Many owners use it exclusively for track days or autocross.

5. **Depreciation and Market Saturation**

The RF-3 market is niche, and while demand exists among track enthusiasts, supply can be saturated. This means prices may not appreciate as much as other classic or collectible cars. Buyers should be prepared to negotiate and may face competition from other RF-3 buyers.

6. **Potential for Modifications Gone Wrong**

The RF-3 s engine and chassis are capable of significant modifications, but poor tuning or overbuilding can lead to reliability issues. For example, pushing the 3.0L engine too hard without proper cooling or reinforcement can cause catastrophic failure. Similarly, aggressive suspension or brake upgrades without proper setup can compromise handling.

7. **Legal and Insurance Hurdles**

If the car is not street-legal, you ll need to ensure it meets local regulations for track use (e.g., safety certifications, fire suppression systems). Even if it is street-legal, insurers may require additional documentation or may refuse to cover it, leading to high self-insured retentions or exclusions.

8. **Reliability Concerns Over Time**

Like any high-performance car, the RF-3 s components (especially suspension, brakes, and engine internals) will wear out over time. Older examples may have accumulated track abuse, leading to issues like warped rotors, worn bushings, or engine wear. Buyers should thoroughly inspect the car s history and condition before purchasing.

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### **Conclusion**

The Mazda RF-3 (M4E-6090-CD, 2003 2008) is a fantastic track car with a loyal following, offering an unmatched driving experience for enthusiasts who prioritize performance over practicality. It is well-suited for those who are passionate about autocross, track days, or high-performance driving but are prepared for the challenges of ownership. However, it is not a car for casual drivers or those seeking a reliable daily vehicle. The high cost of ownership, maintenance demands, and limited comfort make it a specialized purchase that requires dedication and budget.

If you are an experienced driver with a passion for Mazda s track heritage and the resources to maintain and modify the car, the RF-3 can be an incredibly rewarding project. For others, it may be more prudent to consider a more practical high-performance car (e.g., a Miata, RX-7, or even a modified RX-8) that balances track capability with daily usability.

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### **Recommendation**

1. **If You Are Buying for Track Use Only:**

- Focus on finding a well-maintained example with a clean service history, preferably one that has been regularly serviced by a Mazda specialist or RF-3 tuner.

- Prioritize cars with original or high-quality aftermarket parts, especially the engine, suspension, and brakes.

- Budget for immediate upgrades (e.g., tires, brakes, or suspension) to ensure the car is track-ready.

- Join RF-3 owner groups or forums to learn from experienced owners about common issues and modifications.

2. **If You Are Buying for Street-Legal Use:**

- Ensure the car meets all local street-legal requirements (e.g., DOT tires, lights, emissions compliance).

- Be prepared for higher insurance costs and the challenges of driving it safely on public roads.

- Consider whether the RF-3 s limitations (comfort, visibility, stability) align with your daily driving needs.

3. **Alternative Considerations:**

- If you love the RF-3 s spirit but want something more practical, explore the **Mazda RX-7 FD3S (2002 2006)** or **RX-8 (2003 2012)** for a balance of track capability and street usability.

- For a more budget-friendly track car, the **Mazda MX-5 Miata (NA or NB)** or **Toyota AE86** offers similar driving dynamics with lower ownership costs.

Ultimately, the RF-3 is a car for those who want to live the Mazda track experience fully. If you are committed to its care and enjoy the challenges it presents, it can be an incredibly satisfying purchase. Otherwise, weigh the trade-offs carefully before committing.

Details:

The product is a remanufactured 2003 08 Mazda 6 3.0l Engine Cylinder Head made of aluminum, with bolts included. It is manufactured in Japan by Mazda, with the OE/OEM Part Number RF-3M4E-6090-CD. This cylinder head is not considered a performance part, making it reliable replacement for the original part in Mazda 6 vehicle.

part #: rf3m4e6090 price

  • $300.32

specifications cylinderheapar:

  • for makes: Mazda
  • for years: 2003-2008
  • mpn: Rf-3m4e-6090-cd
  • type: Cylinder Head
  • items included: Bolts
  • material: Aluminum
  • country of origin: Japan
  • performance part: No

payments cylinderheapar:

  • wallet: Paypal
  • credit card: Discover
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general cylinderheapar:

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

offer cylinderheapar:

  • availability: In Stock
  • options: Ship-to-home
  • sold: 0
  • started: March 3, 2026
  • quantity: 1

shipping cylinderheapar:

  • type: Fixed
  • service: FedEx Ground / FedEx Home Delivery
  • carrier: FedEx
  • class: Standard
  • transit: 3-9 Days
  • cost: $93.51

seller cylinderheapar:

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

returns cylinderheapar:

  • paid by: Buyer
  • policy: Returns Accepted
  • time: 30 Days
for makes: mazda, for years: 2003-2008, 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: 11651746500771782,
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1 offer $300.32 USD
  • Used. Offer #1 priced at $300.32 + $93.51 shipping estimate = $393.83* total. This cylinder head is not considered a performance part, making it a reliable replacement for the original part in a Mazda 6 vehicle. The product is a remanufactured 2003-08 Mazda 6 3.0l Engine Cylinder Head made of aluminum, with bolts included.+$93.51 shipping

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