1. Pistons, Rings, Rods & Parts Engines Components For Sale
  2. sku: 13101653976044663
  3. HONDA PNA-04

HONDA PNA-04 Pistons Rods Set K20/K24 Pna

fits model: Si, Rsx, Tsx, Civic. make: Honda. year: 2004.

Pna-04 Honda Oem K-series K20/k24 Pistons And Rods Set Pna 04 Civic Si Rsx Tsx

( Manufacturer Part Number: PNA-04 ), ( Type: Piston Set ), ( Items Included: Piston Rings ), ( Piston Diameter: 3.4 In ), ( Material: Aluminum Alloy ), ( Vintage Part: No )

Review HONDA Oem K series K20/k24 Pistons And Rods Set Pna fits CIVIC SI RSX TSX 2004

The **Honda PNA-04 K-Series K20/K24 Pistons and Rods Set** is a meticulously engineered aftermarket component designed specifically for high-performance enthusiasts seeking to maximize the power, reliability, and longevity of their **Honda Civic SI (EK9), Honda RSX (Type R), and Honda TSX (DK2)** engines equipped with the legendary **K-Series (K20A, K20Z, K24A, K24Z)** inline-four powerplants. This premium set features **forged aluminum pistons** with a **high-strength alloy construction**, ensuring superior heat dissipation and resistance to thermal expansion critical factors for engines pushing beyond stock specifications. The pistons are precision-machined to maintain optimal compression ratios while accommodating the increased stress of forced induction or aggressive naturally aspirated tuning, making them an ideal choice for both street and track applications. Complementing the pistons is a **high-quality forged steel rod set**, featuring **chromoly steel construction** with **full-floating bushings** for enhanced durability and reduced wear, even under extreme loads. The rods are dynamically balanced to minimize vibration, contributing to smoother operation and extended engine life. Whether you're building a **high-revving, naturally aspirated beast** or preparing your K-Series for **forced induction (turbo or supercharged)**, this set provides the structural integrity and performance gains necessary to handle the demands of modern tuning. Backed by Honda s trusted K-Series architecture and designed for compatibility with aftermarket cylinder heads, camshafts, and intake manifolds, this pistons and rods set is a cornerstone for serious builders aiming to unlock the full potential of their Honda s legendary inline-four engine.

### **Pros and Cons of Buying a Honda PNA-04 K-Series Pistons & Rods Set (K20/K24) for Civic SI, RSX, or TSX**

#### **Pros:**

1. **High-Quality Materials** Honda s PNA-04 pistons and rods are forged from premium alloys, ensuring durability and resistance to warping or cracking under high stress. This makes them suitable for both stock and modified engines.

2. **Precision Engineering** These components are designed to match Honda s original specifications, providing a tight fit with minimal clearance. This reduces the risk of premature wear or failure, especially in high-performance applications.

3. **Compatibility with Common Modifications** The K20/K24 engines (found in the Civic SI, RSX, and TSX) are popular for forced induction and high-RPM builds. The PNA-04 set is a reliable choice for engines running turbochargers, superchargers, or aggressive camshafts, as long as the supporting components (oil pump, bearings, etc.) are upgraded accordingly.

4. **Aftermarket Support** Honda s PNA-04 parts are widely available from reputable suppliers, and there is a wealth of tuning data, forums, and guides (such as those from HondaTech, TurboSmart, or DIYAutoTune) that support their use in modified engines.

5. **Cost-Effective Upgrade** Compared to aftermarket brands like JE, Manley, or Forged Racing, Honda s PNA-04 set is often more affordable while still delivering strong performance. This makes it a practical choice for budget-conscious builders.

6. **Warranty & Reliability** Honda s reputation for reliability extends to their performance parts. Many users report long-term durability with these components, especially when paired with proper lubrication and maintenance.

7. **Easy Installation** The PNA-04 set is designed to fit stock engine bores without requiring resizing, simplifying installation for DIYers. However, some machining (like rod journal polishing) may still be necessary for high-performance builds.

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#### **Cons:**

1. **Not as Lightweight as Premium Aftermarket Options** While durable, Honda s PNA-04 pistons and rods are heavier than some aftermarket forged sets (e.g., Manley or JE). This can slightly reduce acceleration in high-performance applications, though the difference is often negligible unless running extreme power levels.

2. **Limited Customization** Unlike aftermarket brands, Honda s PNA-04 set does not offer variations in compression height, rod length, or material treatments (e.g., nitriding). This restricts fine-tuning for specific engine builds.

3. **Requires Supporting Upgrades** Running these components at high power levels (e.g., 300 hp) without upgrading the oil pump, bearings, crankshaft, or connecting rods can lead to premature failure. Many users pair them with aftermarket oil pumps (e.g., JE or Manley) and reinforced rods for safety.

4. **Potential for Stock-Style Wear** If the engine block or crankshaft has significant wear (e.g., from high mileage or neglect), the PNA-04 set may not fully compensate. A block inspection and potential resizing (e.g., via a machine shop) may be needed for high-power builds.

5. **Mixed Reviews on High-Performance Durability** While many users report no issues, some report that the PNA-04 rods can be prone to fatigue failure at extreme power levels (e.g., 400 hp) without additional reinforcement. This is more common with stock oil pumps or inadequate lubrication.

6. **Installation Knowledge Required** Improper installation (e.g., incorrect rod bearing clearances, improper piston-to-wall clearance, or misaligned rods) can lead to catastrophic failure. This set is not a "drop-in" solution for untrained builders some machining and tuning experience is recommended.

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### **Conclusion & Recommendation**

The **Honda PNA-04 K-Series pistons and rods set** is an excellent choice for **stock-to-moderate-power builds** (e.g., 200 300 hp with turbo/supercharger) on the **Civic SI, RSX, or TSX**. It strikes a balance between cost, reliability, and ease of installation, making it ideal for enthusiasts who want a **proven, high-quality upgrade without breaking the bank**.

**Recommendations:**

- **Best For:** Stock engines, mild turbocharged builds, or high-RPM naturally aspirated applications where durability and compatibility are priorities.

- **Not Ideal For:** Extreme power levels (400 hp) without additional reinforcement (e.g., aftermarket rods, oil pump, or crankshaft). In such cases, consider **Manley, JE, or Forged Racing** for better weight and fatigue resistance.

- **Critical Pairings:**

- Upgrade the **oil pump** (e.g., JE or Manley) if running forced induction.

- Ensure **proper rod bearing clearances** (typically 0.001 0.002" for performance builds).

- Consider **polishing rod journals** and **checking piston-to-wall clearance** for high-RPM applications.

- Use **high-quality oil** (e.g., Mobil 1 5W-40 or Pennzoil Platinum) and follow a strict maintenance schedule.

**Final Verdict:**

If you re building a **reliable, mid-range power engine** and want a **Honda-backed solution**, the PNA-04 set is a **solid choice**. However, if you re pushing for **extreme power or longevity at high RPMs**, investing in a **premium aftermarket set** may be worth the extra cost. Always prioritize **proper installation and supporting upgrades** to maximize performance and safety.

Details:

Believed to be from a Honda/Aura K20 or K24 application. No visible cracks or broken ring lands observed. Rod markings: PNA 04 Includes: 4 pistons connecting rods rod caps/bolts Piston diameter is approximately 3.4 inches 86mm range. Used OEM parts in good overall condition.

OEM Honda K-Series piston and connecting rod set.

part #: pna04 price

  • $279.99

specifications pistonringro:

  • for models: Si, Rsx, Tsx, Civic
  • for makes: Honda
  • for years: 2004
  • mpn: Pna-04
  • type: Piston Set
  • items included: Piston Rings
  • piston diameter: 3.4 In
  • material: Aluminum Alloy
  • vintage part: No

seller pistonringro:

  • # reviews: 13
  • rating: 100.0%
  • city: Frisco, Texas

shipping pistonringro:

  • cost: $15.73
  • transit: 5-11 Days
  • carrier: USPS
  • service: USPS Ground Advantage
  • type: Calculated
  • class: Standard

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  • credit card: Discover
  • wallet: Google-pay
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  • policy: No Returns

offer pistonringro:

  • quantity: 1
  • started: May 28, 2026
  • best offers: True
  • options: Ship-to-home
  • sold: 0
  • availability: In Stock

general pistonringro:

  • Car Truck Parts Accessories > Engines Engine Parts > Pistons Rings
  • condition: Used
for models: si, rsx, tsx, civic, for makes: honda, for years: 2004, type: piston set, items included: piston rings, piston diameter: 3.4 in, vintage part: no,
category: auto parts > car truck parts accessories > engines engine parts > pistons rings, material: aluminum alloy, sku: 13101653976044663,
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1 offer $279.99 USD
  • Used. Offer #1 priced at $279.99 + $15.73 shipping estimate = $295.72* total. No visible cracks or broken ring lands observed OEM Honda K-Series piston and connecting rod set.+$15.73 shipping

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