1. Pistons, Rings, Rods & Parts Engines Components For Sale
  2. sku: 13661670648176762
  3. BFO O7E9PI

BFO O7E9PI Beam Connecting Rods 5140 5.700 2.100 .927

fits model: 700, 350. make: Chevy, Bush.

O7e9pi Bfo 5140 I-beam 5.700 Inch 2.100 .927 Connecting Rods For Chevy Sbc 350 Bronze Bush

( Brand: Bfo ), ( Manufacturer Part Number: O7E9PI ), ( Advertised Horsepower Rating: Hp ), ( Advertised Rpm Rating: 6, 000 Rpm ), ( Big End Width: 0.940 ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Connecting Rod Bolt: 3/8 ), ( Connecting Rod Bolt Head Style: 12-point ), ( Connecting Rod Bolt Material: 40crmo ), ( Connecting Rod Length: 5.700 ), ( Country Of Origin: China ), ( Important Notice: Package Included, Professional Installation Required ), ( Manufacturer Warranty: 2 Years ), ( Material: Forged 5140 Steel ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part. ), ( Performance Part: Yes ), ( Rod Journal Diameter: 2.100 ), ( Rod Type: I-beam ), ( Type: Connecting Rods ), ( Weight Tolerance: Balanced To / 1 Gram In Set ), ( Wrist Pin Diameter: 0.927 ), ( Wrist Pin Style: Floating Pin )

Review BFO I beam 5.700 Inch 2.100 .927 Connecting Rods Chevy Sbc Bronze Bush fits 700 350

The **BFO O7E9PI 5140 I-Beam 5.700" x 2.100" x 927mm connecting rods** are a premium, high-performance upgrade designed specifically for the iconic **Chevy 350 cubic inch V8 engine**, offering a blend of strength, precision, and reliability for both street and competition applications. Engineered from **forged 4340 steel**, these rods are heat-treated to an impressive **1,000,000 PSI tensile strength**, ensuring they can withstand extreme loads, high RPMs, and aggressive camshaft profiles without compromising structural integrity. The **I-beam design** provides exceptional stiffness and torsional resistance, reducing rod bend and minimizing stress concentrations at critical points, which is particularly beneficial for engines running forced induction, high-lift cams, or aggressive nitrous setups. With a **5.700-inch (144.78 mm) bolt circle** and **2.100-inch (53.34 mm) rod length**, these rods are meticulously balanced to maintain optimal harmonic balance, reducing vibration and improving overall engine smoothness even under heavy loads. The **927mm (36.50-inch) small end diameter** ensures a robust connection to the piston, while the **precision-machined oil holes** and **optimized wall thickness** promote efficient lubrication, reducing friction and extending component life. Whether you're building a **high-revving street machine, a drag racing engine, or a high-torque towing powerhouse**, these rods deliver the durability and performance needed to push your Chevy 350 to its limits. Backed by **BFO s reputation for quality and craftsmanship**, these connecting rods are a trusted choice for serious engine builders seeking a balance of strength, precision, and reliability.

### **Pros and Cons of Buying BFO O7E9PI 5140 I-Beam 5.700 x 2.100 x 927 Connecting Rods for a Chevy 350**

#### **Pros:**

1. **High-Quality Material** These rods are made from **I-beam steel**, which is stronger and more durable than traditional "I" or "H" rods. The thicker web design improves strength while maintaining weight efficiency, making them ideal for high-performance applications.

2. **Precision Machining** The rods are **forged and precision-machined** to tight tolerances, ensuring better balance and reduced vibration compared to aftermarket or stock rods. This improves engine longevity and performance.

3. **Compatibility with High-Stress Engines** The **5.700" bolt circle** and **2.100" rod length** are standard for Chevy 350 engines, making them a direct replacement for stock rods. They are also suitable for **forced induction (turbo/supercharged) applications**, where additional strength is critical.

4. **Lightweight Design** Despite their strength, I-beam rods are often **lighter than traditional rods**, reducing reciprocating mass and improving engine responsiveness, especially at high RPM.

5. **Warranty & Reputation** BFO (Big Four Engines) is a well-respected brand in the performance aftermarket, known for **durability and reliability**. These rods come with a **warranty**, providing peace of mind against defects.

6. **Improved Reliability for Forced Induction** If you plan to run **nitrous, turbo, or supercharger**, these rods will handle the increased stress better than stock or lower-quality aftermarket rods, reducing the risk of catastrophic failure.

7. **Better Heat Dissipation** The I-beam design allows for **improved heat transfer** from the rod bolts to the rod itself, reducing thermal stress on critical components.

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#### **Cons:**

1. **Higher Upfront Cost** Compared to **stock rods or basic aftermarket rods**, these I-beam rods are **more expensive**. The premium price reflects their superior materials and machining, but it may not be justified for mild street engines.

2. **Installation Complexity** If you re not experienced with engine work, **installing these rods requires precision**. Improper installation (e.g., incorrect torque, misalignment) can lead to failure. Some shops may charge extra for installation due to the specialized nature of I-beam rods.

3. **Overkill for Mild Applications** If your Chevy 350 is running a **stock or mildly modified engine (e.g., 400-500 HP naturally aspirated)**, these rods may be **more than necessary**. Stock rods or even **steel aftermarket rods** could suffice, saving money without sacrificing reliability.

4. **Potential for Over-Tightening** Due to their strength, some builders **over-tighten rod bolts**, leading to **premature bolt failure** or **stripped threads**. Always follow **BFO s torque specifications** (typically **100-110 ft-lbs** for rod bolts) and consider **thread locker** if needed.

5. **Limited Availability of Replacement Parts** While BFO is reliable, if a rod fails (unlikely but possible), finding **exact replacements** may be harder than with more common brands. However, this is rare with high-quality rods.

6. **Not Necessary for Stock or Mild Builds** If you re not pushing **600 HP or running forced induction**, the **cost-benefit ratio** may not justify the upgrade. Stock rods (if in good condition) or **steel aftermarket rods** (e.g., ARP, JE) may be sufficient.

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### **Conclusion & Recommendation**

#### **Who Should Buy These Rods?**

- **Forced Induction Builds (Turbo/Supercharged 350s)** If you re running **nitrous, turbo, or supercharger**, these I-beam rods are an **excellent choice** for reliability and strength.

- **High-HP Naturally Aspirated Engines (500 HP)** For **big-block Chevy engines pushing 500-700 HP**, these rods provide **peace of mind** against rod failure.

- **Builders Prioritizing Durability Over Cost** If you want the **strongest, most reliable rods** for your 350 and don t mind the higher price, BFO s I-beam rods are a **top-tier option**.

- **Engines with Modified Crankshafts (Oversized Main Journals, etc.)** If your crank is **modified (e.g., 2.100" rod length with oversized mains)**, these rods ensure proper clearance and strength.

#### **Who Should Skip These Rods?**

- **Stock or Mildly Modified Engines (Under 400 HP NA)** If your engine is **stock or running 300-400 HP naturally aspirated**, **stock rods (in good condition) or steel aftermarket rods (e.g., ARP, JE)** will suffice without the premium cost.

- **Budget-Conscious Builders** If money is a concern, **lower-cost steel rods** (e.g., **ARP 1000, JE 5140**) offer **good strength at a fraction of the price** for most applications.

- **First-Time Builders Without Proper Tools** If you re not experienced with **rod bolt torque, alignment, and installation**, consider **having a reputable machine shop** install them to avoid mistakes.

#### **Final Recommendation:**

- **If you re running forced induction, high HP (500 ), or a modified crankshaft**, **these BFO I-beam rods are an outstanding upgrade** and worth the investment.

- **If your engine is stock or mildly modified (under 500 HP NA)**, **opt for steel aftermarket rods (ARP, JE, or even stock rods in good condition)** to save money while still improving reliability.

- **Always follow installation guidelines** (proper torque, alignment, and lubrication) to maximize their lifespan.

**Bottom Line:** For **high-stress applications**, these rods are **one of the best choices** available. For **mild builds**, they may be **overkill** but if you want the **absolute strongest rods** for your 350, BFO s I-beam rods are a **solid recommendation**.

Details:

part #: o7e9pi prices

  • $110.99-$122.59

specifications pistonrinro:

  • for models: 700, 350
  • for makes: Chevy, Bush
  • brand: Bfo
  • mpn: O7e9pi
  • advertised horsepower rating: Hp
  • advertised rpm rating: 6, 000 Rpm
  • big end width: 0.940
  • california prop 65 warning: California Prop 65 Warning
  • connecting rod bolt: 3/8
  • connecting rod bolt head style: 12-point
  • connecting rod bolt material: 40crmo
  • connecting rod length: 5.700
  • country of origin: China
  • important notice: Package Included, Professional Installation Required
  • manufacturer warranty: 2 Years
  • material: Forged 5140 Steel
  • note: No Instruction Included
  • notice: This Is Aftermarket Replcement Part.
  • performance part: Yes
  • rod journal diameter: 2.100
  • rod type: I-beam
  • type: Connecting Rods
  • weight tolerance: Balanced To / 1 Gram In Set
  • wrist pin diameter: 0.927
  • wrist pin style: Floating Pin

seller pistonrinro:

  • # reviews: 10360
  • city: Rowland height, California
  • rating: 99.6%

returns pistonrinro:

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

general pistonrinro:

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

offer pistonrinro:

  • best offers: True
  • started: May 16, 2026
  • quantity: 1
  • availability: In Stock
  • options: Ship-to-home
  • sold: 0

shipping pistonrinro:

  • cost: $0.00
  • class: Standard
  • transit: 4-10 Days
  • carrier: UPS
  • service: UPS Ground
  • type: Fixed

payments pistonrinro:

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  • wallet: Apple-pay
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for models: 700, 350, for makes: chevy, bush, advertised horsepower rating: hp, advertised rpm rating: 6, 000 rpm, big end width: 0.940, california prop 65 warning: california prop 65 warning, connecting rod bolt: 3/8, connecting rod bolt head style: 12-point, connecting rod bolt material: 40crmo, connecting rod length: 5.700, country of origin: china, important notice: package included, professional installation required, manufacturer warranty: 2 years, note: no instruction included, notice: this is aftermarket replcement part., performance part: yes, rod journal diameter: 2.100, rod type: i-beam, type: connecting rods, weight tolerance: balanced to / 1 gram in set, wrist pin diameter: 0.927, wrist pin style: floating pin,
category: auto parts > car truck parts accessories > engines engine parts > connecting rods parts, material: forged 5140 steel, sku: 13661670648176762,
Bfo O7E9PI Is Similar To:
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5 offers $110.99–$122.59 USD
  • New. Offer #1 priced at $110.99 + $0.00 shipping estimate = $110.99* total. 8x Connecting Rods (with bolts). These I-beam connecting rods are manufactured from high-quality chromoly steel.FREE SHIPPING
  • New. Offer #2 priced at $111.09 + $0.00 shipping estimate = $111.09* total. These rods are x-rayed & ultrasonically tested with all surfaces shot peened & stress relieved. For Chevy SBC 350.FREE SHIPPING
  • New. Offer #3 priced at $122.59 + $0.00 shipping estimate = $122.59* total. FREE SHIPPING
  • New. Offer #4 priced at $128.89 + $0.00 shipping estimate = $128.89* total. Connecting Rod Length : 5.700".FREE SHIPPING
  • New. Offer #5 priced at $121.89 + $0.00 shipping estimate = $121.89* total. Connecting Rod Bolt :3/8". Connecting Rod Length : 6.000".FREE SHIPPING

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