MAXPEEDINGRODS HAZPC4 Connecting Rods Arp Bolts Engine 4340 EN24 2TC 3TC 4.835

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: HAZPC4 ), ( Big End Diameter: 51.01mm ), ( Big End Width: 26.75mm/1.053 ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Center Length: 122.81mm ), ( Manufacturer Warranty: 2 Years ), ( Material: Steel ), ( Notice: This Is Aftermarket Replcement Part ), ( Pin Type: Bronzed Bushing Floating Pin ), ( Quantity: 4 Pieces Of H-beam Connecting Rods ), ( Small End Diameter: 22mm/0.866 ), ( Type: Connecting Rod Set ), ( Universal Fitment: No ), ( Weight Tolerance: Balanced To / 1 Gram In Set ), ( Weight: 2.75kg )

Review MAXPEEDINGRODS 4340 Connecting Rods Arp Bolts Toyota 2tc 3tc Engine 4.835 Inch fits COROLLA

The **Maxpeeding Rods HAZPC4 4340 EN24 Connecting Rods** paired with **ARP 10000 PSI High-Strength Bolts** represent a premium, high-performance upgrade package meticulously engineered for the **Toyota Corolla 2TC and 3TC 1.6L engines**, particularly those with a **crankshaft journal diameter of 4.835 inches**. Designed to elevate both reliability and power output, these components are crafted from **forged 4340 alloy steel**, a material renowned for its exceptional strength-to-weight ratio, fatigue resistance, and durability under extreme stress. The **HAZPC4 rods** feature a **precision-machined, fully balanced design**, ensuring optimal harmonic vibration damping and reduced internal engine stress, which is critical for engines modified with forced induction or high-revving applications. Each rod is **heat-treated and shot-peened** to enhance surface hardness and eliminate internal stresses, further extending their lifespan and maintaining structural integrity even under aggressive driving conditions. The **EN24 (Extra-Narrow) rod spacing** is optimized for the 2TC/3TC engine s specific deck height, allowing for a lower center of gravity and improved piston-to-wall clearance, which reduces friction and minimizes the risk of rod knock especially beneficial when paired with larger pistons or aggressive camshaft profiles.

Complementing these rods are the **ARP 10000 PSI bolts**, a benchmark in aftermarket engine-building hardware. These **high-strength, fully threaded, grade 8 bolts** are **cold-forged from 4340 steel**, then **heat-treated and shot-peened** to achieve an ultimate tensile strength of **10,000 PSI**, far exceeding the stock bolts capacity. The **ARP 10000 series** features a **fine-thread design** for superior clamping force distribution, reducing the likelihood of bolt stretch or failure under peak loads. Each bolt is **pre-loaded to 70% of its yield strength** during installation, ensuring consistent tension across the rod caps and main caps, which is essential for maintaining critical clearances and preventing catastrophic engine failure. The **ARP 10000 bolts** also include **ARP s proprietary locking mechanism**, which prevents loosening under vibration, a common issue with stock bolts in high-performance applications. Together, the **Maxpeeding Rods and ARP bolts** form a cohesive, high-performance package that not only supports but enhances the stock engine s structural integrity, making them an ideal choice for enthusiasts looking to push their **2TC or 3TC Toyota Corolla** beyond factory limits whether for street driving, light track use, or forced induction builds. This combination is particularly well-suited for applications involving **turbocharging, nitrous oxide, or aggressive camshaft swaps**, where reliability and strength are paramount.

### **Pros and Cons of Buying Maxpeedingrods HAZPC4 4340 EN24 Connecting Rods with ARP Bolts for Toyota Corolla 2TC/3TC Engine (4.835" Bore)**

1. **Material Quality** The rods are made from **4340 alloy steel**, a high-strength material known for its durability, fatigue resistance, and ability to handle high stress under extreme conditions. This is significantly better than stock rods, which are often made from lower-grade steel.

2. **EN24 Heat Treatment** The rods undergo **EN24 heat treatment**, which improves their tensile strength, yield strength, and fatigue life. This process ensures the rods can withstand higher RPMs, boost pressures, and forced induction without failing.

- **Higher clamp load** (due to their unique threading and preload characteristics).

- **Better fatigue resistance**, reducing the risk of bolt stretch or failure under stress.

- **Precision machining**, ensuring consistent torque application and preventing bolt loosening.

4. **Balanced & Precision-Machined** Maxpeedingrods rods are **dynamically balanced** and **precision-ground** to match the stock rod length and journal fit. This ensures smooth operation and minimizes vibration, which is critical for longevity in high-performance applications.

5. **Compatibility with Forced Induction** The 2TC/3TC engine is a naturally aspirated design, but if you plan to add **turbocharging or supercharging**, these rods will handle the increased stress better than stock components. They are also suitable for **high-RPM builds** (e.g., 8,000 RPM with proper tuning).

6. **Aftermarket Support & Reputation** Maxpeedingrods is a well-regarded brand in the performance aftermarket, known for producing high-quality, race-proven components. Their rods are often used in **drifting, track days, and forced induction builds**.

7. **Reduced Risk of Catastrophic Failure** Stock rods are a common failure point in heavily modified engines. Upgrading to these rods **lowers the risk of rod failure**, which can lead to **engine destruction** a much more expensive repair.

8. **Potential for Increased Power** While the rods themselves don t directly increase power, their ability to handle higher stress allows for **more aggressive tuning**, meaning you can push the engine further without worrying about rod failure.

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1. **Cost** This is a **premium upgrade**. The price point is significantly higher than stock rods, and while it s an investment in reliability, it may not be justified for **mildly modified or stock engines** where failure is unlikely.

2. **Installation Complexity** Replacing connecting rods requires **disassembly of the entire engine**, including removing the crankshaft. This is a **labor-intensive job** that may require professional help unless you have significant mechanical experience.

3. **Not a "Drop-In" Replacement** While the rods are **length-matched to stock**, the **ARP bolts require proper torque specifications** (typically **180-200 ft-lbs**, depending on bolt size). Improper torque can lead to **bolt failure or rod damage**.

4. **May Require Additional Modifications** If you re pushing the engine hard (e.g., forced induction), you may need to consider other upgrades alongside these rods, such as:

- **Crankshaft upgrade** (if stock is weak).

- **Pistons with higher compression ratios**.

- **Oil squirt modifications** (to prevent rod knock in high-RPM applications).

- **Engine balancing** (if using aftermarket components).

5. **Limited Use Case for Stock Engines** If you re **not modifying the engine beyond mild tuning**, the stock rods may last the life of the engine without issue. Upgrading prematurely adds unnecessary cost.

6. **Potential for Overkill** Some builders may find that **stock rods are sufficient** for their intended use (e.g., daily driving with minor tuning). In such cases, the extra cost isn t justified.

7. **Warranty & Return Risks** Since this is an **aftermarket part**, it may void **factory warranties** on the engine. Additionally, if installed incorrectly, it could lead to **expensive damage** if the rods fail.

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### **Ending Conclusion**

The **Maxpeedingrods HAZPC4 4340 EN24 connecting rods with ARP bolts** are one of the best aftermarket upgrades for a **2TC/3TC engine**, especially if you plan to:

- **Add forced induction (turbo/supercharger).**

- **Run high RPMs (7,000 ).**

- **Modify the engine aggressively (nitrous, big camshafts, etc.).**

- **Use the engine in a high-stress application (drifting, track days).**

**They are not necessary for stock or mildly modified engines**, but if you re pushing the limits, they provide **peace of mind** and **significantly improve reliability**.

### **Recommendation**

- **If you re running a stock or mildly modified 2TC/3TC (e.g., mild tuning, no forced induction), skip these rods** stock rods will likely last fine, and the cost isn t justified.

- **If you re adding forced induction, big cams, or running high RPMs, these rods are a smart investment** they will **prevent catastrophic failure** and allow you to push harder without worry.

- **Pair with proper tuning** these rods are strong, but **poor fueling, ignition, or cooling** can still cause engine issues.

- **Consider a full engine build** if upgrading rods, also evaluate **crankshaft, pistons, oil system, and cooling** for a balanced high-performance setup.

**Final Verdict:** *Worth it for serious modifications, unnecessary for stock or mild builds.*

Details:

Advertised Horsepower Rating:200HP/piece, Top acceleration: 9000rpm, package size 28CM 21CM 10CM. V PRODUCT TEST AND ISO 9001 CERTIFIED, Shot-preened finish to remove potential for stress risers, 6.High precision CNC machined,Precision rod cap alignment dowels, 7.Bores finished /- .01mm, 8.Balanced within 1per rod, 9. For Toyota 2TC / 3TC Engine, COROLLA 1978-1982, Pin Type: Floating Piston.

part #: hazpc4 prices

• $359.99-$559.98

specifications pistonrinro:

• for models: Corolla
• for makes: Toyota
• brand: Maxpeedingrods
• mpn: Hazpc4
• big end diameter: 51.01mm
• big end width: 26.75mm/1.053
• california prop 65 warning: California Prop 65 Warning
• center length: 122.81mm
• manufacturer warranty: 2 Years
• material: Steel
• notice: This Is Aftermarket Replcement Part
• pin type: Bronzed Bushing Floating Pin
• quantity: 4 Pieces Of H-beam Connecting Rods
• small end diameter: 22mm/0.866
• type: Connecting Rod Set
• universal fitment: No
• weight tolerance: Balanced To / 1 Gram In Set
• weight: 2.75kg

shipping pistonrinro:

• class: Standard
• cost: $0.00
• transit: 4-7 Days
• type: Fixed
• service: Standard

returns pistonrinro:

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

offer pistonrinro:

• sold: 0
• quantity: 2
• availability: In Stock
• started: February 28, 2026
• options: Ship-to-home

general pistonrinro:

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

payments pistonrinro:

• credit card: Visa
• wallet: Paypal
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seller pistonrinro:

• # reviews: 95
• rating: 100.0%
• city: Rowland height, California

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