BFO E74Y90 Benz Connecting Rod 3.0L 3.5L M272

( Brand: Bfo ), ( Manufacturer Part Number: E74Y90 ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Finish: Polished ), ( Fitment: For Mercedes-benz C280/c300/c350/e230/e280/e300/e350, For Mercedes-benz Clk280/clk350/clk350/cls300/cls350, For Mercedes-benz Glk300/glk350/ml300/ml350/ml300, For Mercedes-benz Ml300/ml350/ml450/r280/r300/r350, For Mercedes-benz S280/s300/s350/s400/sl300/sl350, For Mercedes-benz Slk280/slk300/slk350 2004-2015 ), ( Manufacturer Warranty: 2 Years ), ( Material: Steel ), ( Oe/oem Part Number: A2730300620, A2730300820, 2730300620, 2730300820 ), ( Performance Part: Yes ), ( Type: Connecting Rod ), ( Vintage Part: No )

Review BFO Connecting Rod Assembly Mercedes benz 3.0l 3.5l fits CLS300 CLS350 2005–2010

The **BFO E74Y90 Connecting Rod** is a precision-engineered, high-performance replacement part designed specifically for Mercedes-Benz M272 3.0L and 3.5L inline-six engines found in the **CLS-Class (W218) models from 2005 to 2010**, including the **CLS 300 and CLS 350**. Crafted from **forged 42CrMo4 steel**, this connecting rod is built to exacting standards, ensuring superior strength, durability, and reliability critical components for maintaining optimal engine performance and longevity. The E74Y90 rod features a **smooth, polished surface finish** and **precision-machined bearing journals**, reducing friction and wear while enhancing efficiency. Its **optimized weight distribution** and **rigid construction** help minimize vibration and stress on the crankshaft and bearings, contributing to a quieter, more responsive engine operation. Whether replacing a failed rod due to fatigue, wear, or an accident, or upgrading for enhanced durability in high-performance applications, this aftermarket rod is a **direct-fit, OEM-quality alternative** that meets or exceeds factory specifications. Backed by **rigorous quality control**, the BFO E74Y90 is a trusted choice for mechanics and enthusiasts seeking a **cost-effective, high-reliability solution** without compromising on performance or fitment. Proper installation with the correct gasket and torque specifications is essential to ensure long-term functionality and engine integrity.

### Pros and Cons of Buying a BFO E74Y90 Connecting Rod for a Mercedes-Benz CLS 300/CLS 350 (M272, 2005 2010)

1. **Direct Fitment** The E74Y90 connecting rod is specifically designed for the M272 engine family, ensuring compatibility with the 3.0L and 3.5L variants produced between 2005 and 2010. This eliminates the need for modification or conversion, reducing installation complexity.

2. **High-Quality Materials** BFO (Big Finish Overhaul) parts are known for using premium materials, including forged steel for connecting rods, which enhances durability and resistance to fatigue. This can improve engine longevity, especially if the original rods were worn or damaged.

3. **Performance Potential** Upgraded rods can reduce weight slightly compared to stock components, potentially improving engine balance and reducing internal stress. This may contribute to better performance, especially in high-RPM applications or after forced induction modifications.

4. **Reliability for Overhauls** If you re performing a full engine rebuild or addressing internal wear (e.g., from oil sludge, excessive carbon buildup, or failure), replacing rods with new ones prevents catastrophic failure risks. The E74Y90 rod is a common upgrade for M272 builds, backed by a strong aftermarket reputation.

5. **Compatibility with Aftermarket Parts** Since the M272 is a popular engine, the E74Y90 rod works seamlessly with other aftermarket components like pistons, crankshafts, and bearings, making it easier to customize the engine without compatibility issues.

6. **Warranty and Support** Reputable suppliers of BFO parts often provide warranties and technical support, offering peace of mind if installation or fitment issues arise.

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1. **Cost** High-quality aftermarket connecting rods like the E74Y90 are more expensive than OEM replacements. For an M272 engine, prices typically range between **$150 $300 per rod**, depending on the supplier and quantity purchased. Since a complete set requires **8 rods** (4 for each bank), the total cost can be significant, especially when combined with other rebuild components.

2. **Installation Complexity** Replacing connecting rods requires disassembly of the engine, including removal of the crankshaft, pistons, and bearings. This is an advanced mechanical task that demands precision, proper tools (e.g., rod bearing pullers, torque wrenches), and experience. DIYers without engine rebuild experience may need to pay a mechanic, adding labor costs.

3. **Potential for Overkill** If the engine is otherwise in good condition with no signs of internal damage (e.g., cracked rods, excessive wear on rod bolts or journals), upgrading to new rods may be unnecessary. In such cases, the cost could be justified only if paired with other upgrades (e.g., pistons, crankshaft).

4. **Rod Bolt Tightening** Connecting rod bolts (especially on the M272) require precise torque specifications to avoid overtightening or loosening. Improper tightening can lead to rod bolt failure, which is catastrophic. Some aftermarket rods come with pre-torqued bolts, but verification is still critical.

5. **Limited Savings on Full Rebuild** If you re rebuilding the entire engine, the cost of new rods is a small fraction of the total expense (which includes pistons, bearings, seals, etc.). The real value lies in preventing future failures rather than saving money upfront.

6. **Supplier Variability** While BFO is a trusted brand, quality can vary between suppliers. Some sellers may offer counterfeit or substandard rods labeled as "BFO." Always purchase from verified dealers with return policies and authenticity guarantees.

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### **Conclusion**

The **BFO E74Y90 connecting rod** is a **strong upgrade choice** for the Mercedes-Benz CLS 300/CLS 350 (M272) if you re addressing internal engine wear, planning a performance rebuild, or seeking long-term reliability. Its forged construction and direct fitment make it a reliable option, especially for high-mileage or modified engines. However, the **cost and labor requirements** of installation mean it s best suited for those undertaking a **comprehensive engine overhaul** rather than a minor repair.

If your engine shows **no signs of rod damage** (e.g., no rattling, no oil consumption, no visible wear on rod journals), the upgrade may not be necessary. In such cases, focusing on other high-impact upgrades (e.g., pistons, crankshaft, or oil system improvements) could yield better returns on investment.

For **most M272 rebuilds**, the E74Y90 rod is a **recommended choice** due to its balance of quality and compatibility. However, **budget-conscious builders** might consider **OEM replacement rods** (if available) or **high-quality alternatives** like **JE or Scat** if cost is a primary concern.

- You re performing a **full engine rebuild** or addressing **internal wear/failure risks**.

- You re modifying the engine (e.g., forced induction, high-RPM tuning) and want to ensure durability.

- You prioritize **long-term reliability** over cost savings.

- The engine is in **good condition** with no signs of rod damage.

- You re on a **tight budget** and can achieve similar results with other upgrades.

- You lack the **experience or tools** for proper installation (consider a professional mechanic).

**Pro Tip:** Pair the rod upgrade with **new rod bolts** (preferably **ARP or Mucoff**) and **high-quality bearings** (e.g., **Mahle or Fel-Pro**) to maximize safety and performance. Always follow **factory torque specs** for rod bolts (typically **60 70 Nm** for M272, depending on bolt type).

Details:

Guaranteed Fitment Always the correct part. Telephone number. For Car model is for reference only; actual compatibility may vary.

HASSLE-FREE INSTALLATION: designed as a direct drop-in replacement, allowing for straightforward installation without modifications. Installation should be done by a qualified technician. Color: Silver. Connecting Rod Assembly for Mercedes-Benz CLS300 CLS350 3.0L 3.5L M272 2005 -2010.

7th, After Apr. Fast Shipping. Material: Metal. OE/Part number.

Save time and money with this perfectly matched component. Showing as the picture. PERFORMANCE RELIABILITY: Restores optimal engine performance and efficiency, ensuring smooth power delivery reducing vibration. 1 Engine Connecting Rod.

Check OE numbers to ensure proper fitment. Built to handle the demands of your luxury vehicles performance needs. Package included.

Full physical.

part #: e74y90 price

• $84.76

specifications pistonrinro:

• for models: Cls300, Cls350
• for makes: Mercedes
• for years: 2005-2010
• brand: Bfo
• mpn: E74y90
• california prop 65 warning: California Prop 65 Warning
• finish: Polished
• fitment: For Mercedes-benz C280/c300/c350/e230/e280/e300/e350, For Mercedes-benz Clk280/clk350/clk350/cls300/cls350, For Mercedes-benz Glk300/glk350/ml300/ml350/ml300, For Mercedes-benz Ml300/ml350/ml450/r280/r300/r350, For Mercedes-benz S280/s300/s350/s400/sl300/sl350, For Mercedes-benz Slk280/slk300/slk350 2004-2015
• manufacturer warranty: 2 Years
• material: Steel
• oe/oem part number: A2730300620, A2730300820, 2730300620, 2730300820
• performance part: Yes
• type: Connecting Rod
• vintage part: No

general pistonrinro:

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

returns pistonrinro:

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

shipping pistonrinro:

• class: Standard
• service: FedEx Ground / FedEx Home Delivery
• carrier: FedEx
• transit: 3-7 Days
• type: Fixed
• cost: $0.00

seller pistonrinro:

• # reviews: 2534
• city: Elk Grove Village, Illinois
• rating: 99.6%

offer pistonrinro:

• availability: In Stock
• best offers: True
• quantity: 1
• options: Ship-to-home
• sold: 0
• started: February 18, 2026

payments pistonrinro:

• credit card: Discover
• other
• wallet: Paypal

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