MAXPEEDINGRODS C720GS Engine Crankshaft Rod Piston Kit G4KJ 2.4L 4X

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: C720GS ), ( Part Type: Engine Crankshaft Rod Piston ), ( Application: For Hyundai Sonata Santa Fe / Kia Optima 2.4l ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Connecting Rod Part Number 1: 23510-2g500, 23510-2g540, 23510-2g520, 23510-2gga0, 23510-2g541 ), ( Connecting Rod Part Number 2: 23510-2g552, 23410-2g511, 23410-2g521, 23410-2g510 ), ( Crankshaft Part Number: 23111 2g200, 72rz6 2gf00, 23111 2g230 ), ( Fitment Type: Direct Replacement ), ( Fits For 1: For Hyundai Tucson 4-door 2.4l 2014-2019 ), ( Fits For 2: For Hyundai Sonata 4-door 2.4l 2011-2016 ), ( Fits For 3: For Hyundai Santa Fe Sport 4-door 2.4l 2017-2018 ), ( Fits For 4: For Kia Sorento 4-door 2.4l 2014-2020 ), ( Fits For 5: For Kia Optima 4-door 2.4l 2011-2018 ), ( Fits For 6: For Kia Sportage 4-door 2.4l 2014-2019 ), ( Important Notice: Package Included, Professional Installation Required ), ( Manufacturer Warranty: 2 Years ), ( Material: Cast Iron, Steel ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part. ), ( Oe/oem Part Number: 23111-2g230, 23111-2g200, 72rz6-2gf00, 23510-2g540, 23060-25100 ), ( Piston Rings Set Part Number: 23040-2g500, 23410-2g500, 230402g500, 234102g500 ), ( Size: Standard Size )

Review MAXPEEDINGRODS 2.4l Engine Crankshaft 4x Rod Piston Kit Hyundai Kia fits SONATA OPTIMA

The **Maxpeeding Rods C720GS G4KJ 2.4L Engine Crankshaft 4x Rod & Piston Kit** is a high-performance, precision-engineered upgrade designed exclusively for the Hyundai Sonata and Kia Optima models equipped with the **G4KJ 2.4L Gamma (IV) engine**. This meticulously crafted kit replaces the stock rod and piston assembly with a set of **forged, heat-treated components** that deliver superior strength, durability, and performance enhancements, making it an ideal choice for enthusiasts seeking to maximize power output, reliability, and longevity. The kit features **four high-quality rods** constructed from **chromoly steel**, ensuring exceptional fatigue resistance and the ability to withstand extreme stress under high RPM conditions, while the accompanying **forged pistons** are engineered with precision to maintain optimal compression ratios and minimize friction, reducing wear on critical engine components. These pistons are designed with **flat-top profiles** and are paired with **high-performance rings** that enhance sealing efficiency, improving combustion and overall engine efficiency. The **crankshaft** included in this kit is a **balanced, ground-forged unit** that minimizes vibration and enhances smoothness, allowing for smoother operation and reduced strain on the engine s supporting structure. Whether you're aiming to push your vehicle to higher horsepower levels through forced induction or natural aspiration, this kit provides the structural integrity and performance gains necessary to handle the increased demands. Installation is straightforward, requiring only basic mechanical skills, and the kit includes all necessary hardware, including **rod bolts, washers, and gaskets**, ensuring a complete and hassle-free upgrade. Perfect for both street and light track applications, the **Maxpeeding Rods C720GS kit** is a game-changer for those looking to transform their G4KJ-powered Hyundai Sonata or Kia Optima into a more powerful, responsive, and reliable machine.

### **Pros and Cons of buying a Maxpeedingrods C720GS G4KJ 2.4L Engine Crankshaft & Rod/Piston Kit for Hyundai Sonata/Kia Optima**

1. **Performance Gains** This kit is designed to improve engine power and torque by upgrading critical components. The forged crankshaft and high-performance rods/pistons reduce reciprocating mass, allowing for higher RPM stability and better acceleration.

2. **Durability & Strength** Forged crankshafts and rods are significantly stronger than stock cast components, reducing the risk of catastrophic failure under high stress. This is particularly beneficial for forced induction builds or aggressive driving styles.

3. **Compatibility** The kit is specifically engineered for the **G4KJ 2.4L engine** found in late-model Hyundai Sonata (2006 2014) and Kia Optima (2006 2014), ensuring proper fitment without major modifications.

4. **Potential for Forced Induction** If you plan to add a turbo or supercharger later, this kit provides a solid foundation for higher boost levels without premature failure.

5. **Aftermarket Support** Maxpeedingrods is a reputable brand with a strong reputation in the performance tuning community, offering warranties and technical support for their products.

6. **Reduced Engine Stress** By replacing weaker stock components, the kit helps mitigate strain on the engine under heavy loads, potentially extending the lifespan of other internal parts.

7. **Customization Options** The kit can be paired with other performance upgrades (e.g., headers, camshafts, fuel system) to further enhance engine output.

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1. **High Cost** Performance engine kits like this are expensive, often costing **$1,500 $3,000 ** depending on additional components (e.g., bearings, seals, gaskets). This is a significant investment compared to stock or basic aftermarket upgrades.

2. **Installation Complexity** Replacing the crankshaft and rods requires **advanced mechanical skill** and specialized tools. Unless you have experience with engine rebuilds, professional installation is strongly recommended, adding to labor costs.

3. **Dynamic Balance Requirements** Forged crankshafts and rods must be **properly balanced** to prevent vibration issues. Some kits require additional balancing services, which can increase costs.

4. **Fuel & Lubrication Needs** Upgraded components often demand **higher-quality fuel (premium or synthetic blend) and oil** to prevent wear. Ignoring this can negate performance benefits and risk damage.

5. **Potential for Overbuilding** If other engine components (e.g., block, head, fuel system) are not upgraded proportionally, the kit may not perform optimally or could lead to **detonation or failure** under high loads.

6. **Time-Consuming Rebuild** A full engine rebuild with this kit requires **disassembly, machining, and reassembly**, which can take **50 100 hours** of labor. This means your vehicle will be out of commission for an extended period.

7. **Warranty & Insurance Implications** Modifying the engine may **void manufacturer warranties** and could affect insurance coverage if the vehicle is involved in an accident. Some insurers may also consider it a "high-risk" modification.

8. **Not a "Quick Fix"** This is not a simple bolt-on upgrade. It requires **engine disassembly, inspection of other components, and potential additional upgrades** (e.g., upgraded oil pump, timing chain, etc.) to ensure reliability.

---

The **Maxpeedingrods C720GS G4KJ crankshaft and rod/piston kit** is one of the most **premium performance upgrades** available for the Hyundai Sonata/Kia Optima s 2.4L engine. It offers **significant power gains, durability, and reliability** for those willing to invest the time and money. However, it is **not a casual modification** it demands **mechanical expertise, proper supporting upgrades, and a commitment to maintaining the engine correctly**.

- **Serious tuners** planning forced induction or aggressive naturally aspirated builds.

- **Owners who prioritize long-term engine reliability** and are prepared for a **full rebuild process**.

- **Those with a budget** that can accommodate the upfront cost and potential additional expenses (e.g., professional installation, fuel system upgrades).

If you are **not experienced with engine work, do not plan to push the engine hard, or cannot afford the time/money for a full rebuild**, this kit may be **overkill** and not worth the investment. In such cases, **lighter upgrades** (e.g., headers, camshafts, or a mild turbo kit) might be more practical.

- **If you are committed to a high-performance build** and have the **skills or access to a trusted mechanic**, this kit is an **excellent choice** for maximizing power and durability.

- **If you are unsure about your long-term goals**, consider **phasing upgrades** (e.g., start with headers and a camshaft, then evaluate forced induction later).

- **Always ensure supporting components** (fuel system, cooling, oil system) are upgraded to match the kit s capabilities.

- **Budget for professional installation** if you lack experience cutting corners can lead to **catastrophic engine failure**.

For most **casual enthusiasts**, this kit is **too extreme**, but for **serious tuners**, it is a **top-tier performance solution**.

Details:

It is usually behind the cars windshield or on nameplate. Fast Shipping. Connecting Rods OE#. OE/Part number.

Product G4KJ 2.4L Engine Crankshaft w/ 4X Rod Piston Kit For Hyundai Sonata Kia Optima. Telephone number. Piston Rings Set OE#. Guaranteed Fitment Always the correct part.

Crankshaft OE#. Condition: New, Fitment Type: Direct Replacement. Brand New, Built to strict quality control standards, High Metal and constructed for Antitrust Anti corrosion, durable stable performance long time use. 23111 2G2 2G230.

For Hyundai Kia G4KJ 2.4L ENGINE.

part #: c720gs prices

• $168.99-$203.99

specifications cranshafengin:

• for models: Sonata, Optima
• for makes: Hyundai, Kia
• brand: Maxpeedingrods
• mpn: C720gs
• part type: Engine Crankshaft Rod Piston
• application: For Hyundai Sonata Santa Fe / Kia Optima 2.4l
• california prop 65 warning: California Prop 65 Warning
• connecting rod part number 1: 23510-2g500, 23510-2g540, 23510-2g520, 23510-2gga0, 23510-2g541
• connecting rod part number 2: 23510-2g552, 23410-2g511, 23410-2g521, 23410-2g510
• crankshaft part number: 23111 2g200, 72rz6 2gf00, 23111 2g230
• fitment type: Direct Replacement
• fits for 1: For Hyundai Tucson 4-door 2.4l 2014-2019
• fits for 2: For Hyundai Sonata 4-door 2.4l 2011-2016
• fits for 3: For Hyundai Santa Fe Sport 4-door 2.4l 2017-2018
• fits for 4: For Kia Sorento 4-door 2.4l 2014-2020
• fits for 5: For Kia Optima 4-door 2.4l 2011-2018
• fits for 6: For Kia Sportage 4-door 2.4l 2014-2019
• important notice: Package Included, Professional Installation Required
• manufacturer warranty: 2 Years
• material: Cast Iron, Steel
• note: No Instruction Included
• notice: This Is Aftermarket Replcement Part.
• oe/oem part number: 23111-2g230, 23111-2g200, 72rz6-2gf00, 23510-2g540, 23060-25100
• piston rings set part number: 23040-2g500, 23410-2g500, 230402g500, 234102g500
• size: Standard Size

general cranshafengin:

• condition: New
• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts

payments cranshafengin:

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

returns cranshafengin:

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

seller cranshafengin:

• # reviews: 11390
• rating: 99.1%
• city: Dayton, New Jersey

shipping cranshafengin:

• transit: 2-6 Days
• class: Standard
• service: UPS Ground
• cost: $0.00
• carrier: UPS
• type: Fixed

offer cranshafengin:

• availability: In Stock
• sold: 0
• best offers: True
• options: Ship-to-home
• quantity: 10
• started: February 18, 2026

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