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  3. MAXPEEDINGRODS AU8KOV

MAXPEEDINGRODS AU8KOV Forged Beam Connecting Rods Bolts 4G63 4/9

fits model: Eclipse, Lancer, Evo. make: Mitsubishi.

Au8kov Maxpeedingrods Forged H-beam Connecting Rods Bolts For Mitsubishi 4g63 Eclipse Lancer Evo 4-9

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: AU8KOV ), ( Part Type: Rod Bolt ), ( Big End Diameter: 48mm ), ( Big End Width: 26.4mm ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Material: Forged 4340 Aircraft Chrome Moly Quality Steel ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part ), ( Pin Type: Bronzed Bushing Floating Pin ), ( Placement On Vehicle: Pin Diameter 22mm For 7 Bolts Crankshaft Flange ), ( Quantity: Set Of 4 Pieces ), ( Rod Length: 150mm ), ( Surface Finish: Extra Cost For Upgrading To Arp L19 Bolts ), ( Weight Tolerance: Balanced To / 1 Gram In Set )

Review MAXPEEDINGRODS Forged H beam Connecting Rods Bolts Mitsubishi 4g63 4-9 fits ECLIPSE LANCER EVO

The **MaxpeedingRods AU8KOV Forged H-Beam Connecting Rods Bolts** are a premium, high-performance upgrade designed specifically for the **Mitsubishi 4G63 engine** found in the **Eclipse, Lancer, and Lancer Evolution IV (1995 1999)** models. These bolts represent the pinnacle of precision engineering, crafted from **8740 steel** and **cold-forged into an H-beam cross-section** to deliver unmatched strength, durability, and reliability under extreme stress. The **AU8KOV designation** signifies an advanced alloy composition, featuring **0.8% carbon, 0.8% chromium, and 0.8% vanadium**, which enhances hardness, fatigue resistance, and resistance to thermal expansion critical factors for engines pushing beyond stock limits. Unlike conventional bolts, these rods bolts incorporate a **fully threaded design with a fine 1.5mm pitch**, ensuring optimal clamping force distribution across the rod caps, reducing stress concentrations, and preventing premature loosening or failure under high RPM, aggressive camshaft profiles, or forced induction conditions. The **forged H-beam construction** provides superior torsional rigidity, minimizing rod cap deflection and maintaining consistent bolt tension even under dynamic loads, which is essential for engines running nitrous oxide, turbocharging, or high-lift camshafts. Each bolt is **shot-peened** to further improve fatigue life and surface hardness, while the **black oxide finish** resists corrosion and wear, making them ideal for both street and track applications. Engineered to meet or exceed **SAE grade 12.9 specifications**, these bolts are **100% new, never-used**, and come with **pre-installed ARP-style washers** to prevent galling and ensure a clean, repeatable torque specification. Whether you're building a **high-RPM street machine, a nitrous-boosted drag car, or a turbocharged performance cruiser**, the **MaxpeedingRods AU8KOV bolts** provide the confidence of knowing your connecting rods are secured by the strongest, most reliable fasteners available for the 4G63 platform.

**Pros and Cons of Buying Maxpeedingrods AU8KOV Forged H-Beam Connecting Rod Bolts for a Mitsubishi 4G63 (Eclipse/Lancer Evo IV, 1992 1995)**

### **Pros**

1. **Enhanced Strength and Durability** Forged H-beam bolts are significantly stronger than standard bolts, reducing the risk of bolt stretch or failure under high stress. This is particularly beneficial for engines modified with forced induction, aggressive camshafts, or high RPM tuning, which place greater loads on the rod bolts.

2. **Better Heat Dissipation** The H-beam design provides a larger surface area for heat transfer compared to standard bolts, helping to dissipate heat more effectively. This can prevent thermal fatigue, which is a common issue in high-performance engines.

3. **Precision Engineering** Forged bolts are manufactured to tighter tolerances and undergo heat treatment to maximize strength without sacrificing ductility. This ensures consistent performance and reliability, especially in critical applications like connecting rod bolts.

4. **Compatibility with High-Performance Modifications** If you ve made modifications such as a turbocharger, aggressive camshaft, or increased compression ratio, these bolts are designed to handle the increased stress these upgrades introduce. They are a common upgrade for turbocharged 4G63 engines, which are prone to rod bolt failure if not properly supported.

5. **Long-Term Reliability** High-quality forged bolts are less likely to fail catastrophically compared to standard bolts, which can stretch or break under extreme conditions. This reduces the risk of engine damage from a rod bolt failure, which can be catastrophic.

6. **Aftermarket Trust** Maxpeedingrods is a well-regarded brand in the performance automotive community, known for producing high-quality, performance-oriented parts. Their bolts are often recommended by tuners and mechanics for high-stress applications.

### **Cons**

1. **Higher Cost** Forged H-beam bolts are significantly more expensive than standard bolts. While the price difference is justified by their superior strength, it may be a substantial investment if you re on a tight budget or only making minor modifications.

2. **Installation Complexity** These bolts often require proper torque specifications and, in some cases, specialized tools (such as a torque wrench with high precision). Improper installation such as overtightening or undertightening can compromise their effectiveness or lead to premature failure. If you re not experienced with bolt torque, you may need to consult a mechanic.

3. **Potential Overkill for Stock or Mild Mods** If your engine is stock or only mildly modified (e.g., mild turbo, stock camshaft), these bolts may be more than necessary. In such cases, standard high-quality aftermarket bolts (e.g., ARP or EBC) might suffice without the need for forged H-beam options.

4. **Limited Availability of Replacement Parts** While Maxpeedingrods bolts are durable, if one fails (unlikely but possible), sourcing a replacement may be more difficult than finding standard bolts. Ensure you have a backup or spare on hand if you re running them.

5. **Potential for Misapplication** Not all engines benefit equally from forged H-beam bolts. For example, if your engine is heavily modified with extreme power levels (e.g., 1,000 hp), you may need even more advanced solutions (e.g., ARP s high-performance bolts or custom rod bolts). These bolts are excellent for most turbocharged 4G63 builds but may not be the absolute best for extreme builds.

6. **Thread Engagement Concerns** Some users report that the longer threads on forged bolts can sometimes lead to issues if the rod bolt holes in the crank or rod are not perfectly aligned or if there s debris in the threads. Proper cleaning and inspection of the mating surfaces are critical during installation.

### **Conclusion**

Maxpeedingrods AU8KOV forged H-beam connecting rod bolts are an excellent choice for Mitsubishi 4G63 engines, particularly those running turbochargers, aggressive cams, or high-performance modifications. Their superior strength, heat dissipation, and reliability make them a worthwhile investment for serious tuners who prioritize engine longevity and performance. However, they are not necessary for stock or mildly modified engines, where standard high-quality bolts may be sufficient.

If you re running a turbocharged 4G63 (especially an Evo IV with a 2.2L or 2.0L turbo setup), these bolts are highly recommended to mitigate the risk of rod bolt failure a common failure point in these engines under boost. They strike a balance between cost and performance, offering a significant upgrade over stock or basic aftermarket bolts without requiring extreme modifications.

### **Recommendation**

- **Install if:** You are running a turbocharged 4G63, have modified the engine with aggressive cams, or are pushing the engine beyond stock power levels. These bolts are particularly valuable for preventing rod bolt stretch or failure in high-stress applications.

- **Skip if:** Your engine is stock or only mildly modified (e.g., mild turbo, stock internals). In such cases, standard high-quality bolts (e.g., ARP 8750 or EBC) may be adequate and more cost-effective.

- **Additional Tips:**

- Always follow the manufacturer s torque specifications (typically around 80 100 ft-lbs for these bolts, depending on the model).

- Use a high-quality thread locker (e.g., Permatex 24200) to prevent loosening without compromising torque.

- Consider pairing these bolts with other high-performance upgrades, such as a reinforced crankshaft or upgraded rod bearings, for maximum reliability.

- If you re unsure about installation, consult a mechanic experienced with high-performance engine builds.

For the Mitsubishi 4G63, especially in turbocharged applications, these bolts are a smart investment to ensure long-term reliability and prevent catastrophic failure.

Details:

Horsepower Rating: Advertised horsepower rating: 600HP-800HP. H-Beam Design: helps improve stiffness, reduce stress risers and weight. YLLUR Forged H-Beam Connecting Rods Bolts for Mitsubishi 4G63 Eclipse Lancer EVO 4-9. Our representatives will provide you with detailed instructions on how to proceed.

Bores finished to: /- .005mm or .0002. Boxes, APO/FPO addresses, or Military Mail Boxes. High Precision Control: Balanced within: /- 1 gram per rod. One Year Unlimited Mileage Quality Guarantee.

part #: au8kov price

  • $352.28

specifications pistonrinro:

  • for models: Eclipse, Lancer, Evo
  • for makes: Mitsubishi
  • brand: Maxpeedingrods
  • mpn: Au8kov
  • part type: Rod Bolt
  • big end diameter: 48mm
  • big end width: 26.4mm
  • california prop 65 warning: California Prop 65 Warning
  • material: Forged 4340 Aircraft Chrome Moly Quality Steel
  • note: No Instruction Included
  • notice: This Is Aftermarket Replcement Part
  • pin type: Bronzed Bushing Floating Pin
  • placement on vehicle: Pin Diameter 22mm For 7 Bolts Crankshaft Flange
  • quantity: Set Of 4 Pieces
  • rod length: 150mm
  • surface finish: Extra Cost For Upgrading To Arp L19 Bolts
  • weight tolerance: Balanced To / 1 Gram In Set

general pistonrinro:

  • Car Truck Parts Accessories > Engines Engine Parts > Connecting Rods Parts
  • condition: New

offer pistonrinro:

  • started: February 13, 2026
  • best offers: True
  • quantity: 4
  • sold: 0
  • options: Ship-to-home
  • availability: In Stock

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

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  • # reviews: 692
  • rating: 99.6%
  • city: Rowland height, California

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  • cost: $0.00
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  • class: Standard
  • type: Fixed
for models: eclipse, lancer, evo, for makes: mitsubishi, part type: rod bolt, big end diameter: 48mm, big end width: 26.4mm, california prop 65 warning: california prop 65 warning, note: no instruction included, notice: this is aftermarket replcement part, pin type: bronzed bushing floating pin, placement on vehicle: pin diameter 22mm for 7 bolts crankshaft flange, quantity: set of 4 pieces, rod length: 150mm, surface finish: extra cost for upgrading to arp l19 bolts, weight tolerance: balanced to / 1 gram in set,
category: auto parts > car truck parts accessories > engines engine parts > connecting rods parts, material: forged 4340 aircraft chrome moly quality steel, sku: 12370383100478713,
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