HONDA 23431-PNS-000 Gear Counter Shaft FN2 K20 6MT 2ND

( Manufacturer Part Number: 23431-PNS-000 ), ( Country Of Origin: Japan ), ( Type: Gear )

Review HONDA Fn2 Type r K20 Genuine 6mt K series 2nd Gear Counter Shaft Oem fits CIVIC

The **Honda 23431-PNS-000 Civic FN2 Type-R K20 6MT K-Series 2nd Gear Countershaft** is a meticulously engineered, high-performance transmission component designed exclusively for the legendary **Honda Civic Type-R (FN2) model**, renowned for its razor-sharp handling, blistering acceleration, and precision engineering. This countershaft, a critical part of the **6-speed manual transmission (K-Series)**, plays a pivotal role in delivering the seamless gear shifts and robust power transfer that the Type-R is celebrated for. Crafted from premium **chromoly steel**, this countershaft is forged to exacting tolerances, ensuring exceptional durability under the extreme stresses of aggressive driving, high-revving engine performance, and frequent gear changes. The **K20 engine** a naturally aspirated, high-revving powerplant demands a transmission component that can withstand relentless torque and rapid shifts, and this countershaft excels in that regard. Its **precision-machined splines, hardened bearings, and optimized gear profiles** work in harmony to minimize friction, reduce wear, and maintain optimal synchro performance, even under the most demanding conditions. Whether you're a track enthusiast pushing the limits of the FN2 s 0-60 mph in under 5 seconds or a street driver seeking effortless, responsive shifts, this countershaft ensures that every gear engagement is crisp, reliable, and free from the slippage or hesitation that can plague aftermarket or worn-out OEM parts. Ideal for both **restoration projects** and **high-mileage Type-Rs** showing signs of wear, this genuine Honda component is a testament to the brand s commitment to performance and longevity. Installing it restores the transmission to its factory-intended specifications, guaranteeing that the FN2 s legendary driving dynamics remain intact whether on the racetrack, the twisty backroads, or the daily commute. For purists and performance seekers alike, this countershaft is an essential upgrade or replacement, ensuring that the Civic Type-R s legendary character is preserved with every shift.

Buying a used **Honda Civic FN2 Type-R (K20Z3, 6MT, K-series, 2nd gear countershaft)** specifically the **23431-PNS-000** variant is a significant investment for enthusiasts seeking a high-performance, track-capable compact car. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Track Heritage and Performance**

The FN2 Type-R is one of the most legendary Honda Civic Type-R models, designed for track use with a **2.0L K-series engine (K20Z3)**, producing **280 hp (JDM) or 272 hp (USDM)** with a **6-speed manual transmission**. Its lightweight construction, aggressive aerodynamics, and rear-wheel-drive layout make it a favorite for drifting, autocross, and track days. The **K-series engine** is renowned for its reliability, tunability, and durability when maintained properly.

2. **Strong Community and Support**

The Type-R community is highly active, with extensive aftermarket support for parts, upgrades, and modifications. Finding mechanics, tuners, and enthusiasts familiar with the FN2 is relatively easy, which helps with maintenance, troubleshooting, and performance enhancements.

3. **Rarity and Collectibility**

The FN2 Type-R (2006 2007) is a rare model, especially in mint condition. Its limited production and cult following drive up its value over time, making it a potentially appreciating asset for collectors. The **23431-PNS-000** variant (likely a specific trim or build) may be even scarcer, adding to its desirability.

4. **Tunability and Mod Potential**

The K20 engine is one of the most tunable in its class, with aftermarket support for **turbocharging, nitrous, camshafts, and suspension upgrades**. The FN2 s chassis is also well-suited for **stiffening, weight reduction, and aerodynamics tweaks**, making it a blank canvas for enthusiasts.

5. **Reliability (When Maintained)**

The K-series engine is known for its longevity, especially in its naturally aspirated form. With proper maintenance (oil changes, timing belt replacement, cooling system checks), many FN2s exceed **200,000 miles**. However, this reliability depends heavily on the car s history and previous ownership.

6. **Driving Experience**

The FN2 offers a **precise, engaging, and responsive** driving experience with sharp handling, a well-tuned suspension, and a gearbox that rewards driver input. The **6-speed manual** is a standout feature, providing a more engaging shift experience than an automatic.

7. **Resale Value**

Due to its popularity, the FN2 Type-R retains its value well, especially in low-mileage or well-documented condition. The **23431-PNS-000** variant may hold even more value if it s a special edition or has unique features.

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### **Cons**

1. **High Purchase Price**

The FN2 Type-R is **not a budget buy**. Even a used example with moderate mileage can cost **$20,000 $40,000 **, depending on condition, location, and demand. This is significantly more expensive than a standard Civic or even a used sports car like a Mazda MX-5.

2. **Maintenance and Repair Costs**

While the K-series engine is reliable, **specialty parts and labor** can be expensive. The **6-speed manual transmission** is known for wear over time, and clutch replacements can be costly. Additionally, **track use or aggressive driving** accelerates wear on components like **brakes, suspension, and drivetrain parts**.

- **Timing belt and water pump replacement** (every 60,000 100,000 miles) is critical but often overlooked.

- **Cooling system failures** (radiator, hoses, thermostat) can lead to catastrophic engine damage if neglected.

- **Suspension and bushings** wear out faster than in a daily driver due to track use.

3. **Depreciation Risk**

While the FN2 holds value better than most cars, it is not immune to depreciation. If you plan to keep it long-term, this may not be an issue, but if you intend to sell later, market fluctuations could affect resale value.

4. **Insurance Costs**

The FN2 Type-R is **expensive to insure**, especially if you plan to use it for track days or aggressive driving. Full coverage with a high deductible may be necessary, adding **$1,500 $3,000 annually** to ownership costs.

5. **Rust and Structural Issues**

Many FN2s (especially older examples) suffer from **rust**, particularly in the **floor pans, subframe, and wheel wells**. A thorough inspection is **mandatory** to avoid buying a car with hidden structural damage that could compromise safety.

6. **Limited Practicality**

The FN2 is **not a daily driver** for most people. Its **tight cabin, lack of modern tech (no Apple CarPlay/Android Auto), and poor fuel economy ( 20 MPG combined)** make it impractical for daily use. If you need a car for commuting, errands, or long trips, you ll need a separate vehicle.

7. **Transmission Wear**

The **6-speed manual** in the FN2 is known for **clutch and synchro wear**, especially in cars with high mileage or track use. A **clutch replacement** can cost **$1,000 $2,000**, and worn synchros can make gear shifts rough or impossible.

8. **Track Use Accelerates Wear**

If the car has a history of **track abuse**, expect **faster wear on brakes, suspension, drivetrain, and engine components**. A car that was primarily used on the track may require **more frequent and costly maintenance** than one used for occasional spirited driving.

9. **Limited Aftermarket Parts Availability**

While the K-series has strong aftermarket support, **some parts (especially rare or discontinued items)** can be difficult to source. Prices for aftermarket upgrades (e.g., **turbo kits, suspension components**) can also be high.

10. **Legal and Registration Restrictions**

Some regions have **restrictions on performance cars**, including **inspection requirements, emissions testing, or even bans on certain modifications**. Ensure the car is **legally compliant** in your area before purchasing.

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### **Conclusion**

Buying a **Honda Civic FN2 Type-R (K20Z3, 6MT, 23431-PNS-000)** is a **high-risk, high-reward** decision. It is **not a practical daily driver** but rather a **track-focused, enthusiast-oriented purchase** that requires significant financial commitment beyond the purchase price. The car s **performance, rarity, and community support** make it a dream for many, but its **high cost of ownership, maintenance demands, and impracticality** mean it s only suitable for buyers who:

- **Prioritize driving enjoyment and track use** over daily convenience.

- **Have the budget** for upkeep, insurance, and potential repairs.

- **Are prepared for a project car** that may require ongoing attention.

- **Appreciate the car s heritage and collectibility** as much as its performance.

- **Thoroughly inspecting the car** (rust, engine condition, transmission, suspension).

- **Verifying maintenance history** (oil changes, timing belt, cooling system).

- **Budgeting for future costs** (insurance, repairs, upgrades).

- **Ensuring it s legally compliant** in your area.

If you re **not willing to commit to the lifestyle** or **cannot afford the long-term costs**, consider alternatives like a **used Mazda MX-5, Toyota GR86, or a well-maintained Honda Integra Type R** for a more practical yet still engaging performance car.

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### **Final Recommendation**

You are an **enthusiast who lives for track days, drifting, and high-performance driving**.

You **have the financial means** to cover purchase price, insurance, and maintenance.

You **accept that it s a project car** and are willing to invest time and money in its upkeep.

You **appreciate the car s rarity and potential appreciation in value**.

You **have a separate vehicle** for daily use.

You need a **practical, daily driver** with modern amenities.

You **cannot afford** the high cost of ownership (insurance, repairs, modifications).

You **don t have experience** with high-performance cars or manual transmissions.

You **don t enjoy maintenance and mechanical work** on your vehicle.

You **prioritize fuel efficiency, comfort, or low running costs** over performance.

For most buyers, the FN2 Type-R is a **passion project** rather than a practical purchase. If you re **completely sold on the idea**, proceed with caution, **inspect the car thoroughly**, and **bud

Details:

Condition of cushioning material, 4. Damaged part, Please understand this before purchasing. Serial code items may require shipping depending on the item.

Outer cardboard box. Electrical parts may require specific voltage settings or adaptors for use outside Japan. This item is a brand new car part. The entire item, 2.

Economy Shipping is typically handled by Japan Post.

part #: 23431pns000 prices

• $111.04-$240.62

specifications autotransmissionsgo:

• for models: Civic
• for makes: Honda
• mpn: 23431-pns-000
• country of origin: Japan
• type: Gear

seller autotransmissionsgo:

• city: Japan
• rating: 100.0%
• # reviews: 132

general autotransmissionsgo:

• Car Truck Parts Accessories > Transmission Drivetrain > Automatic Transmission
• condition: New

returns autotransmissionsgo:

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

offer autotransmissionsgo:

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

payments autotransmissionsgo:

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

shipping autotransmissionsgo:

• type: Fixed
• service: SpeedPAK Expedited
• transit: 22-27 Days
• cost: $34.99
• class: Expedited From Outside

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