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  2. sku: 13218599581741813
  3. MAXPEEDINGRODS A27TWF

MAXPEEDINGRODS A27TWF Forged Beam Connecting Rods Bolts 4G63 4/9

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

A27twf Maxpeedingrods Forged H-beam Connecting Rods Bolts For Mitsubishi 4g63 Eclipse Lancer Evo 4-9

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: A27TWF ), ( 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 A27TWF Forged H-Beam Connecting Rod Bolts** are a premium, high-performance upgrade designed specifically for the iconic **Mitsubishi 4G63 engine** found in the **Eclipse, Lancer Evolution IV (1995 1998), and related models**. Crafted from **ultra-high-strength forged steel**, these bolts feature a distinctive **H-beam design**, which significantly enhances clamping force distribution across the rod caps, reducing stress concentrations and preventing premature fatigue failure a common issue in high-revving, high-stress applications. Unlike standard bolts, which rely on a simple threaded design, the **A27TWF s H-beam construction** ensures a more even load transfer, improving rod bolt longevity and reliability under extreme conditions, such as aggressive driving, forced induction, or high RPM scenarios. Each bolt is **thread-rolled** for added strength and precision, eliminating the risk of thread stripping under heavy loads, while the **fine-tuned torque specifications** (typically around **100 ft-lbs**) prevent overtightening, which can lead to warping or cracking in the rod caps. These bolts are **direct replacements** for the stock OEM components, maintaining the same thread pitch and bolt pattern while delivering a **substantial upgrade in durability and performance**. Whether you're running a **stock turbocharged 4G63, a nitrous kit, or a high-lift camshaft**, the **A27TWF bolts** provide the extra margin of safety needed to handle increased cylinder pressures and rotational forces without compromising engine integrity. Built to withstand the demands of **high-performance tuning**, these bolts are an essential component for anyone looking to push their **Evo IV or Lancer s 4G63 engine** to its limits while ensuring long-term reliability.

**Pros and Cons of Buying Maxpeedingrods A27TWF Forged H-Beam Connecting Rod Bolts for the Mitsubishi 4G63 (Eclipse/Lancer Evo IV, 1993 1998)**

### **Pros**

1. **Superior Strength and Durability** Forged H-beam bolts are significantly stronger than stock bolts, reducing the risk of bolt stretch or failure under high stress, especially in high-performance or modified engines. The forged construction ensures consistent material integrity, which is critical for engines running at higher RPMs or under heavy loads.

2. **Enhanced Reliability** Stock bolts on the 4G63 are known to be prone to stretching, especially in turbocharged or forced-induction applications. Upgrading to these bolts eliminates this concern, providing peace of mind for long-term use, particularly in aggressive driving or track applications.

3. **Precision Engineering** Maxpeedingrods is a reputable manufacturer known for high-quality, precision-engineered fasteners. The A27TWF bolts are designed to meet or exceed OEM specifications while incorporating advanced materials and threading for better grip and longevity.

4. **Compatibility** These bolts are specifically designed for the 4G63 engine, ensuring a perfect fit with the rod caps and main bearing caps. The H-beam design provides better torque distribution, reducing the risk of bolt failure due to uneven stress.

5. **Warranty and Support** Maxpeedingrods offers warranties on their products, which can be reassuring for those investing in high-performance upgrades. Their customer service and technical support are often praised for addressing installation and fitment questions.

6. **Improved Performance Retention** By preventing bolt stretch, these bolts help maintain proper compression and power output over time. This is particularly beneficial for engines running modified camshafts, forced induction, or high-revving applications.

7. **Easy Installation** While they are an upgrade, these bolts are not overly complex to install. They come with clear instructions, and the threads are designed to match the stock rod caps without requiring extensive modification.

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### **Cons**

1. **Cost** Forged H-beam bolts are significantly more expensive than stock bolts. While the price reflects their superior quality, it may be a substantial investment for enthusiasts on a tighter budget. A full set can cost several hundred dollars, depending on the retailer and any additional components needed (e.g., new washers or gaskets).

2. **Installation Requirement** While not overly difficult, installing these bolts requires proper torque specifications and techniques. Over-torquing or under-torquing can compromise their effectiveness. Some users may need to invest in a torque wrench or seek professional help if they lack experience with high-performance bolt installations.

3. **Potential Overkill for Stock Engines** If the engine is running stock or with minimal modifications (e.g., mild tuning, stock turbo), the stock bolts may still suffice. Upgrading to forged H-beam bolts may be unnecessary unless the engine is subjected to significant stress (e.g., aggressive driving, forced induction, or high RPMs).

4. **Limited Availability of Parts** While Maxpeedingrods is well-regarded, some aftermarket retailers may not stock these bolts, requiring purchase directly from their website or authorized dealers. This can add to shipping costs or wait times.

5. **Maintenance Considerations** Forged bolts are designed for longevity, but they still require proper maintenance. This includes regular inspection for signs of wear, corrosion, or improper torque. Neglecting maintenance could lead to premature failure despite the bolts' strength.

6. **Potential for Misapplication** Some users may mistakenly assume these bolts are interchangeable with other engine applications. While they are designed for the 4G63, mixing them with parts from other engines (e.g., 4G93) could lead to fitment issues or reduced performance.

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### **Conclusion**

The Maxpeedingrods A27TWF forged H-beam connecting rod bolts are an excellent upgrade for the Mitsubishi 4G63 engine, particularly for those pushing the engine beyond stock limits whether through forced induction, aggressive tuning, or high-performance driving. Their superior strength, reliability, and precision engineering make them a worthwhile investment for enthusiasts who prioritize durability and performance. However, the cost and the need for proper installation cannot be overlooked. For stock or lightly modified engines, the benefits may not justify the expense, but for serious builders or track-focused applications, these bolts are a smart choice.

### **Recommendation**

- **For Stock or Mildly Modified Engines:** If the engine is running stock or with minimal modifications (e.g., mild turbo, stock internals), the stock bolts may still be adequate. Consider upgrading only if you notice bolt stretch or plan to push the engine harder in the future.

- **For Aggressive or Forced-Induction Applications:** If the engine is turbocharged, nitrous-injected, or running high-revving camshafts, these bolts are highly recommended. They provide the extra strength needed to prevent catastrophic failure and maintain reliability under stress.

- **Installation Tips:** Use a quality torque wrench and follow Maxpeedingrods' recommended torque specifications (typically around 80 90 ft-lbs for rod bolts on the 4G63). Consider using anti-seize compound on the threads to prevent galling, but avoid excessive amounts that could contaminate the oil.

- **Budget Consideration:** If cost is a concern, prioritize these bolts for the most critical applications (e.g., rod bolts before main bolts). However, for a fully upgraded engine, consider investing in a full set of high-quality bolts, including main bolts and studs if applicable.

- **Alternatives:** If Maxpeedingrods bolts are out of budget, other reputable brands like ARP, EBC, or even high-quality aftermarket forged bolts (e.g., from JE or Racepak) are viable alternatives. Always ensure compatibility with the 4G63.

**Final Verdict:** For the 4G63 engine in high-performance or modified applications, the Maxpeedingrods A27TWF bolts are a strong recommendation. They offer a significant upgrade in reliability and strength, making them ideal for enthusiasts who demand the best from their engines. However, weigh the cost against your specific needs to determine if they are the right fit for your project.

Details:

Our representatives will provide you with detailed instructions on how to proceed. Bores finished to: /- .005mm or .0002. High Precision Control: Balanced within: /- 1 gram per rod. Boxes, APO/FPO addresses, or Military Mail Boxes.

H-Beam Design: helps improve stiffness, reduce stress risers and weight. Horsepower Rating: Advertised horsepower rating: 600HP-800HP. One Year Unlimited Mileage Quality Guarantee. YLLUR Forged H-Beam Connecting Rods Bolts for Mitsubishi 4G63 Eclipse Lancer EVO 4-9.

part #: a27twf price

  • $347.07

specifications pistonrinro:

  • for models: Eclipse, Lancer, Evo
  • for makes: Mitsubishi
  • brand: Maxpeedingrods
  • mpn: A27twf
  • 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

returns pistonrinro:

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

seller pistonrinro:

  • rating: 99.2%
  • city: Rowland height, California
  • # reviews: 1023

general pistonrinro:

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

offer pistonrinro:

  • started: April 14, 2026
  • availability: In Stock
  • quantity: 5
  • options: Ship-to-home
  • sold: 0
  • best offers: True

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shipping pistonrinro:

  • class: Standard
  • type: Fixed
  • cost: $0.00
  • carrier: FedEx
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  • transit: 2-4 Days
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: 13218599581741813,
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1 offer $347.07 USD
  • New. Offer #1 priced at $347.07 + $0.00 shipping estimate = $347.07* total. Upgradable ARP L19 Bolts. Will not fit 1G 4G63 6 Bolt Engines.FREE SHIPPING

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