1. Pistons, Rings, Rods & Parts Engines Components For Sale
  2. sku: 13931302349436853
  3. MAXPEEDINGRODS REOM9H

MAXPEEDINGRODS REOM9H Connecting Rods Arp Bolt Hatchback 4340 B48 148MM

fits model: F20, 120i. make: Bmw. year: 2000.

Reom9h Maxpeedingrods 4340 Connecting Rods Arp 2000 Bolt For Bmw 1 Series F20 Hatchback 120i B48 148mm

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: REOM9H ), ( Big End Diameter: 53.6mm/2.11 ), ( Big End Width: 24mm/0.945 ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Center To Center Length: 148mm/5.827 ), ( Country Of Origin: China ), ( Hp Rating: Around 600-800hp ), ( Manufacturer Warranty: 2 Years ), ( Material: Steel ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part ), ( Pin Type: Bronzed Bushing Floating Pin ), ( Placement On Vehicle: Front ), ( Quantity: 4 Pieces As Showing In Picture ), ( Small End Diameter: 22mm/0.866 ), ( Small End Width: 20.8mm/0.819 ), ( Surface Finish: Brand New ), ( Type: Connecting Rod Set ), ( Weight Tolerance: Balanced To / 1 Gram In Set )

Review MAXPEEDINGRODS 4340 Connecting Rods Arp Bolt Bmw Series Hatchback B48 148mm fits F20 120I 2000

The **Maxpeedingrods REOM9H 4340 Forged Connecting Rods** are a high-performance upgrade designed specifically for the BMW F20 120i (B48 engine) platform, offering a substantial boost in durability, strength, and reliability for those seeking to push their vehicle beyond stock limitations. Engineered from **4340 alloy steel**, these rods are precision-forged to deliver exceptional fatigue resistance, ensuring they can withstand the extreme stresses of aggressive driving, forced induction, or high-revving applications without compromising structural integrity. The **148mm bolt pattern** ensures seamless compatibility with the B48 engine s stock crankshaft, while the **ARP 2000 bolt** specification guarantees a secure, high-torque connection that exceeds OEM standards critical for maintaining optimal power transfer and preventing catastrophic failure under heavy loads. These rods are not merely a replacement but a **performance-enhancing component**, allowing for increased boost levels, higher RPM stability, and improved longevity when paired with supporting upgrades like a reinforced crankshaft, upgraded pistons, and a tuned engine management system. Whether you're chasing track days, daily driving with added power, or preparing for a forced induction build, the Maxpeedingrods REOM9H rods provide the **precision engineering and raw strength** needed to handle the demands of modern high-performance applications while maintaining the reliability expected from BMW s B48 engine architecture. Built to endure the rigors of extreme performance, these rods are a testament to Maxpeedingrods commitment to delivering components that push the boundaries of what s possible without sacrificing quality or safety.

### **Pros and Cons of Buying Maxpeedingrods REOM9H 4340 Connecting Rods with ARP 2000 Bolts for BMW F20 120i (B48, 148mm Stroke)**

#### **Pros**

1. **Enhanced Strength and Durability** The **4340 forged steel** rods are significantly stronger than stock cast rods, reducing the risk of catastrophic failure under high loads, especially in forced induction builds. The **REOM9H design** is optimized for high-stress applications, offering better fatigue resistance compared to aftermarket rods that may not be as rigorously tested.

2. **ARP 2000 Bolts for Maximum Reliability** ARP 2000 bolts are among the strongest and most reliable aftermarket options available. They feature **high-strength steel, precise threading, and a proven clamping force**, reducing the risk of bolt stretch or failure under extreme power levels. This combination ensures that the rods remain securely fastened even under heavy loads.

3. **Better Weight Distribution** Forged rods are generally **lighter than stock cast rods** while maintaining or exceeding strength, which can improve engine balance and reduce reciprocating mass. This can lead to smoother operation, especially at high RPM.

4. **Compatibility with Forced Induction** If you plan to run **turbocharging, nitrous, or aggressive tuning**, these rods are a **necessary upgrade** to prevent rod failure. Stock rods are not designed for high boost or extreme power, making this a critical safety upgrade for serious builds.

5. **High-Quality Manufacturing** Maxpeedingrods is a reputable brand known for **precision machining and heat treatment**, ensuring that the rods meet strict tolerances and performance standards. The **REOM9H pattern** is a well-proven design in the tuning community.

6. **Future-Proofing for Power Increases** If you plan to **modify your engine further** (e.g., bigger turbo, higher compression, or more aggressive tuning), these rods will handle the increased stress better than stock components.

7. **Warranty and Support** Maxpeedingrods and ARP offer **warranties** on their products, providing peace of mind in case of manufacturing defects. Additionally, both brands have strong reputations for customer support.

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#### **Cons**

1. **High Cost** The **REOM9H rods and ARP 2000 bolts** are **not cheap**, especially when factoring in labor for installation. This makes them a **significant investment**, which may not be justified for mild builds (e.g., stock or low-power turbo setups).

2. **Installation Complexity** Replacing connecting rods requires **disassembly of the engine**, which is a **labor-intensive process** best left to experienced mechanics. If done incorrectly, it can lead to **misalignment, oil leaks, or other issues**. Some tuners recommend **rebuilding the engine** alongside rod replacement for optimal results.

3. **Not Necessary for Mild Builds** If you are **only running stock or low boost (under 10 psi)**, stock rods may suffice, and upgrading to **REOM9H rods could be overkill**. For these applications, **lighter aftermarket rods (e.g., JE or ISCA) with stock bolts** might be a more cost-effective alternative.

4. **Potential for Overkill** Some tuners argue that **ARP bolts alone** (without rod upgrades) may be sufficient for moderate power levels, depending on the rest of the engine build. If you re unsure about power goals, consulting an **engine builder** before committing to full rod replacement is wise.

5. **Limited Aftermarket Support** While **REOM9H rods are well-regarded**, they are **not as widely available** as some other brands (e.g., JE, ISCA, or Scat). This means **longer lead times** and potentially **higher shipping costs**.

6. **Requires Additional Modifications** Upgrading rods often necessitates **other supporting mods**, such as:

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

- **Piston upgrade** (forged or high-compression)

- **Oil pump and oil passages** (to ensure proper lubrication)

- **Rod bolts (ARP 2000) and proper torque specs**

Failure to address these can **void the benefits** of the rod upgrade.

7. **Risk of Voiding Warranty** If your BMW is still under **factory warranty**, installing aftermarket rods (especially without OEM approval) could **void certain coverage**. This is a **legal and financial risk** to consider.

---

### **Conclusion**

The **Maxpeedingrods REOM9H 4340 connecting rods with ARP 2000 bolts** are a **premium, high-performance upgrade** that is **highly recommended** for:

- **High-power builds (250 hp, forced induction, nitrous, or aggressive tuning)**

- **Engines running high boost (15 psi) or extreme RPMs**

- **Builds where stock components are no longer sufficient**

- **Tuners who prioritize **maximum reliability and longevity** over cost**

However, they are **not necessary** for:

- **Stock or mildly tuned engines (under 200 hp, low boost)**

- **Budget-conscious builds where lighter rods (e.g., JE) with stock bolts may suffice**

- **Casual drivers who do not plan significant power increases**

If you are **serious about high performance**, these rods are a **wise investment** for safety and durability. However, if you are **on a budget or only planning modest modifications**, a **more affordable rod and bolt combo** (e.g., ISCA rods with ARP bolts) may be a better fit.

### **Final Recommendation**

- **If you are running or planning to run:**

- **Boost over 15 psi**

- **Nitrous or extreme tuning**

- **Power levels above 300 hp**

**Go with the REOM9H rods ARP 2000 bolts.** This is the **safest and most reliable** option for high-stress applications.

- **If you are running:**

- **Stock or mild turbo (under 10 psi)**

- **Power levels under 250 hp**

- **A budget-conscious build**

Consider **lighter aftermarket rods (e.g., JE or ISCA) with ARP bolts** instead, as they offer a **better balance of cost and performance**.

- **Always consult an engine builder** before making this upgrade, as **proper supporting mods** (crank, pistons, oil system) are crucial for optimal performance and safety.

Would you like recommendations on **specific supporting mods** based on your power goals?

Details:

Each rod is magnetic particle tested to ensure free of flaws, 10.Use X-rated, sonic tested, 11.Custom Service. Advertised Horsepower Rating:200HP/piece, Top acceleration: 9000rpm, package size 28CM 21CM 10CM. Shot-preened finish to remove potential for stress risers, 6.High precision CNC machined,Precision rod cap alignment dowels, 7.Bores finished /- .005mm, 8.Balanced within 1per rod, 9. us Facebook Account: .

T V PRODUCT TEST AND ISO 9001 CERTIFIED, 2.

part #: reom9h price

  • $374.39

specifications pistonrinro:

  • for models: F20, 120i
  • for makes: Bmw
  • for years: 2000
  • brand: Maxpeedingrods
  • mpn: Reom9h
  • big end diameter: 53.6mm/2.11
  • big end width: 24mm/0.945
  • california prop 65 warning: California Prop 65 Warning
  • center to center length: 148mm/5.827
  • country of origin: China
  • hp rating: Around 600-800hp
  • manufacturer warranty: 2 Years
  • material: Steel
  • note: No Instruction Included
  • notice: This Is Aftermarket Replcement Part
  • pin type: Bronzed Bushing Floating Pin
  • placement on vehicle: Front
  • quantity: 4 Pieces As Showing In Picture
  • small end diameter: 22mm/0.866
  • small end width: 20.8mm/0.819
  • surface finish: Brand New
  • type: Connecting Rod Set
  • weight tolerance: Balanced To / 1 Gram In Set

offer pistonrinro:

  • quantity: 1
  • availability: In Stock
  • started: June 3, 2026
  • options: Ship-to-home
  • sold: 0
  • best offers: True

payments pistonrinro:

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

  • rating: 99.8%
  • city: Rowland height, California
  • # reviews: 35999

returns pistonrinro:

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

general pistonrinro:

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

shipping pistonrinro:

  • carrier: FedEx
  • type: Fixed
  • transit: 3-7 Days
  • class: Standard
  • service: FedEx Ground / FedEx Home Delivery
  • cost: $0.00
for models: f20, 120i, for makes: bmw, for years: 2000, big end diameter: 53.6mm/2.11, big end width: 24mm/0.945, california prop 65 warning: california prop 65 warning, center to center length: 148mm/5.827, country of origin: china, hp rating: around 600-800hp, manufacturer warranty: 2 years, note: no instruction included, notice: this is aftermarket replcement part, pin type: bronzed bushing floating pin, placement on vehicle: front, quantity: 4 pieces as showing in picture, small end diameter: 22mm/0.866, small end width: 20.8mm/0.819, surface finish: brand new, type: connecting rod set, weight tolerance: balanced to / 1 gram in set,
category: auto parts > car truck parts accessories > engines engine parts > connecting rods parts, material: steel, sku: 13931302349436853,
Maxpeedingrods REOM9H Is Similar To:
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1 offer $374.39 USD
  • New. Offer #1 priced at $374.39 + $0.00 shipping estimate = $374.39* total. Bolts: Including ARP 2000 3/8" bolts (Note: Extra cost for upgrading to ARP L19 bolts). For BMW 1 Series F20 2010-2018 Hatchback 120i.FREE SHIPPING

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