BUICK 304.GM4121 Gx Single Piston Connecting Rod Encoregx 1.3

( Model: ENCOREGX ), ( Part Type: Piston Rod ), ( Conditions Options: 4, 1.3 ), ( Genuine Oem: Yes ), ( Ipn: 304.gm4121 ), ( Year: 2021 ), ( Manufacturer Warranty: 60 Day ), ( Partout Id: A-121722901 )

Review BUICK Gx Single Piston Connecting Rod 1.3 fits ENCORE 2020–2023

The **Buick 304 GM4121 Encore GX Single-Piston Connecting Rod** is a precision-engineered component designed to deliver exceptional performance and reliability in the high-output, high-revving environments of modern small-block V8 applications. Part of General Motors **GM4121** performance engine family, this connecting rod is meticulously crafted to meet the demands of the **2020 2023 Buick Encore GX**, which features the **3.0L Ecotec Turbocharged V6** paired with a **1.3L Turbocharged 3-Cylinder** in its hybrid powertrain configurations, though this rod is specifically tailored for the **304 cubic-inch (5.0L) small-block V8** found in high-performance variants or aftermarket builds. Engineered from **forged 4340 chromium-molybdenum alloy steel**, this rod is heat-treated to achieve an optimal balance of strength, durability, and fatigue resistance, ensuring it can withstand the extreme stresses of forced induction, aggressive tuning, and high-rpm operation. The **single-piston design** enhances rigidity, reducing flex and minimizing the risk of catastrophic failure under heavy loads, while the **GX-grade construction** incorporates precision-machined surfaces, including **honed rod journals** and **ultra-smooth big-end bearings**, to minimize friction and maximize efficiency. This rod is compatible with **2020 2023 model-year Buick applications**, including the **Encore GX**, as well as aftermarket builds seeking to upgrade stock components for increased power output, longevity, and reliability. Whether integrated into a **turbocharged, nitrous-injected, or supercharged setup**, this connecting rod is engineered to handle the demands of modern high-performance driving, offering a robust alternative to stock parts for enthusiasts looking to push their engines to new limits without compromising structural integrity.

### **Pros and Cons of Buying a Buick Enclave with the GM 4.1L V6 (LZ4) Engine (2020 2023 Models)**

The **Buick Enclave** with the **4.1L V6 (GM LZ4) engine** is a mid-size luxury SUV that offers a balance of comfort, performance, and reliability. Below is a detailed breakdown of its advantages and disadvantages, followed by a conclusion and recommendation.

---

### **Pros**

1. **Smooth and Refined Performance**

The **4.1L V6 (LZ4)** is a naturally aspirated engine that delivers **288 horsepower and 280 lb-ft of torque**, providing adequate power for highway driving and towing (up to **3,500 lbs** with the proper tow package). It offers a **smooth, linear power delivery** without the need for forced induction, making it a pleasant drive for daily use.

2. **Good Fuel Economy for a V6 SUV**

- **City:** 16 18 MPG

- **Highway:** 24 26 MPG

This is better than many competing V8 or turbocharged SUVs, though not as efficient as a diesel or hybrid.

3. **Reliability and Durability**

The **LZ4 engine** is a **proven design** (used in the Chevrolet Traverse and GMC Acadia) with **fewer known issues** compared to some turbocharged or high-mileage V8 engines. Buick has also improved **software and drivetrain tuning** in recent years, reducing common complaints from older models.

4. **Comfortable and Quiet Cabin**

The Enclave is known for its **well-insulated cabin**, reducing road noise and vibrations. The **adaptive suspension** (available in higher trims) helps smooth out bumps, making it a comfortable choice for long drives.

5. **Spacious Interior and Practicality**

The Enclave offers **three rows of seating**, with **ample legroom and cargo space** (up to **18.6 cu. ft. behind the third row**). The **panoramic sunroof** and **premium materials** (in higher trims) enhance the luxury feel.

6. **Good Safety Features**

- Forward Collision Alert

- Lane Keep Assist

- Blind Spot Monitoring

- Rear Cross-Traffic Alert

- Automatic Emergency Braking

Higher trims come with **360-degree cameras and adaptive cruise control**.

7. **Resale Value**

Buick has improved its resale retention over the past few years, and the Enclave holds its value **better than some competitors** in its class.

8. **Available Tech and Infotainment**

The **12.3-inch touchscreen** (with **Wireless Apple CarPlay and Android Auto**) is user-friendly, and **available features** like **360-degree cameras, rear-seat entertainment, and a premium sound system** add to the appeal.

9. **Lower Maintenance Costs Than Some Competitors**

Compared to **turbocharged engines (e.g., Ford s EcoBoost, Toyota s V6)** or **high-mileage V8s (e.g., Chevrolet s 6.2L), the 4.1L V6** tends to have **lower repair costs** and fewer complex components.

10. **Good Warranty Coverage**

Buick offers a **standard 3-year/36,000-mile basic warranty** and a **5-year/60,000-mile powertrain warranty**, which is competitive in the luxury SUV market.

---

### **Cons**

1. **Lower Horsepower Than Some Competitors**

- **Ford Explorer V6 (3.5L EcoBoost):** 310 HP

- **Chevrolet Traverse V6 (3.6L):** 288 HP (same, but with better fuel economy)

- **Toyota Highlander V6 (3.5L):** 292 HP

- **Honda Pilot V6 (3.5L):** 280 HP (but with better efficiency)

If towing or hauling is a priority, some buyers may find the **4.1L slightly underpowered** compared to turbocharged options.

2. **Higher Fuel Consumption Than Hybrid/Turbo Alternatives**

- **Hybrid SUVs (Toyota Highlander Hybrid, Ford Escape Hybrid)**

- **Turbocharged engines (Ford EcoBoost, Honda VTEC Turbo)**

This can add up over time, especially for high-mileage drivers.

3. **Some Reports of Transmission Issues (Early 2020 Models)**

A few owners of **early 2020 Enclaves** reported **rough shifting or delayed engagement** in the **8-speed automatic transmission**. GM has since **updated firmware** to address these issues, but **buyers should check service records** if considering an older model.

4. **Less Powerful Than a V8 (If Needed for Towing)**

While the **4.1L can tow up to 3,500 lbs**, some buyers who frequently tow heavy loads may prefer a **V8 (e.g., Chevrolet Traverse V8, Ford Explorer V8)**, which can handle **up to 5,000 lbs** with proper equipment.

5. **Higher Price Than Some Competitors**

The Enclave is **positioned as a luxury SUV**, and its **starting MSRP ( $40,000 )** is **higher than non-luxury three-row SUVs** (e.g., Honda Pilot, Toyota Highlander). If budget is a concern, there are **more affordable alternatives** with similar features.

6. **Some Complaints About Interior Build Quality**

While the materials are **premium in higher trims**, some owners report **plastic-feeling trim in lower trims** and **less refined stitching** compared to **Lexus, Genesis, or Acura**.

7. **Limited Availability of Aftermarket Support**

Compared to **Ford, Toyota, or Honda**, Buick has **fewer independent mechanics and aftermarket parts**, which could be a concern for long-term ownership.

8. **Resale Depreciation (Compared to Some Rivals)**

While Buick has improved, the Enclave still **depreciates faster than some luxury brands** (e.g., Lexus, Acura). If resale value is a priority, **Toyota or Honda may be better long-term investments**.

9. **No Diesel Option (For Heavy Towing/Off-Roading)**

Unlike **Ram 1500, Ford F-150 (Power Stroke), or Chevrolet Silverado (Duramax)**, the Enclave does **not offer a diesel engine**, limiting its appeal for **serious towing or off-road use**.

10. **Early Models Had Some Software Glitches**

Some **2020 2021 Enclaves** had **infotainment lag or connectivity issues**, though GM has **updated firmware** in later models.

---

### **Conclusion**

**Comfort and refinement**

**A balance of power and fuel efficiency**

**Luxury features and safety tech**

**Reliability without excessive maintenance costs**

**Need maximum towing power** (consider a V8 or turbocharged SUV)

**Want the best fuel economy** (hybrids or turbocharged engines may be better)

**Prefer a brand with stronger resale value** (Lexus, Toyota, Honda)

**Require extensive aftermarket support** (Ford, Chevrolet, Toyota have more options)

---

### **Recommendation**

- You want a **comfortable, three-row SUV** with **luxury features** and **good reliability**.

- You **don t need extreme towing power** (3,500 lbs is sufficient for most needs).

- You prefer **Buick s refined driving experience** over some competitors.

- You **value warranty coverage** and **lower maintenance costs** compared to turbocharged or high-mileage engines.

- You **don t mind slightly higher fuel consumption** in exchange for a smoother ride.

- **Towing is a priority** **Chevrolet Traverse V8, Ford Explorer V6 EcoBoost, Ram 1500 (Diesel)**

- **Best fuel economy is needed** **Toyota Highlander Hybrid, Ford Escape Hybrid, Honda Pilot**

- **Strong resale value is a concern** **Lexus RX, Acura RDX, Toyota Highlander**

- **You want a more engaging drive** **Audi Q7, BMW X5 (

Details:

It is stored in doors and ready to be shipped. Stock Number - 2601. Donor Vehicle - 2021 ENCOREGX. Warranty: All parts come with our standard 60 day warranty.

specifications pistonringro:

• for models: Encore
• for makes: Buick
• for years: 2020-2023
• model: Encoregx
• part type: Piston Rod
• conditions options: 4, 1.3
• genuine oem: Yes
• ipn: 304.gm4121
• year: 2021
• manufacturer warranty: 60 Day
• partout id: A-121722901

payments pistonringro:

• credit card: Visa
• wallet: Apple-pay
• other

returns pistonringro:

• policy: Returns Accepted
• time: 60 Days
• paid by: Buyer

general pistonringro:

• Car Truck Parts Accessories > Engines Engine Parts > Pistons Rings
• condition: Used

seller pistonringro:

• city: Sauk Centre, Minnesota
• rating: 99.7%
• # reviews: 28779

offer pistonringro:

• sold: 0
• options: Ship-to-home
• availability: In Stock
• best offers: True
• quantity: 1
• started: April 7, 2026

shipping pistonringro:

• type: Fixed
• class: Expedited
• transit: 3-7 Days
• cost: $0.00
• service: USPS Priority Mail
• carrier: USPS

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