1. Pistons, Rings, Rods & Parts Engines Components For Sale
  2. sku: 13926532167886762
  3. MAXPEEDINGRODS 91UG8F

MAXPEEDINGRODS 91UG8F Beam Connecting Rods Arp EJ20 5.137

fits model: Ej22, Ej25, Wrx, Sti, Impreza. make: Subaru. year: 2000.

91ug8f Maxpeedingrods I-beam Connecting Rods For Subaru Impreza Wrx Sti Ej20 Ej22 Ej25 Arp 2000 5.137 Inch

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: 91UG8F ), ( Part Type: Rod ), ( Big End Diameter: 55mm/2.165 ), ( Big End Width: 21.4mm/0.843 ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Country Of Origin: China ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part. ), ( Pin Type: Bronzed Bushing Floating Pin ), ( Rod Length: 130.5mm/5.137 ), ( Small End Diameter: 23mm/0.905 ), ( Weight Tolerance: Balanced To / 1 Gram In Set )

Review MAXPEEDINGRODS I beam Connecting Rods Subaru Arp 5.137 Inch fits IMPREZA EJ22 EJ25 WRX STI 2000

The **Maxpeedingrods 91UG8F I-Beam Connecting Rods** represent the pinnacle of performance engineering for Subaru s legendary WRX STI models, meticulously crafted to elevate the power, reliability, and durability of the iconic EJ20, EJ22, and EJ25 engines. Designed with precision and built to ARP 2000 specifications, these rods embody a fusion of aerospace-grade materials and cutting-edge manufacturing techniques, ensuring they can withstand the extreme demands of forced induction, high-revving applications, and relentless track or street use. The **I-beam architecture** is a hallmark of Maxpeedingrods philosophy, offering an optimal balance between strength and weight reducing mass while maintaining uncompromising rigidity to minimize rod deflection and enhance power delivery. Each rod is forged from **7075-T6 aluminum**, a high-strength alloy renowned in aviation and motorsports for its exceptional fatigue resistance and ability to endure cyclic stress without failure, even under the most aggressive conditions. The **5.137-inch bolt pattern** ensures seamless compatibility with stock crankshafts while accommodating aftermarket components, making these rods an ideal choice for both stock-based builds and full turbocharged setups.

Beyond their structural integrity, the **91UG8F rods** feature a **fully machined, polished surface finish**, eliminating stress risers and promoting smoother oil flow within the rod journals and caps, which is critical for maintaining consistent lubrication under high RPM and extreme loads. The **ARP 2000 bolts** included with these rods are a game-changer, offering a **2000 lb. clamp force** that exceeds the strength of stock hardware, ensuring the rod caps remain securely fastened even when pushing the engine to its limits. This level of preload prevents catastrophic failure and allows for aggressive tuning without compromising safety. Whether you're running a **stock EJ20 with a mild turbo kit**, a **fully built EJ22 with a twin-turbo setup**, or a **highly modified EJ25 in a drift or track application**, these rods provide the stiffness and reliability needed to unlock the full potential of your engine. Maxpeedingrods doesn t just sell components they deliver a **proven, race-ready solution** that turns raw power into predictable, high-revving performance, making them a staple in the arsenal of serious STI enthusiasts who refuse to settle for anything less than the best.

### **Pros and Cons of Buying Maxpeedingrods 91UG8F I-Beam Connecting Rods for Subaru Impreza WRX STI (EJ20, EJ22, EJ25) with ARP 2000 5.137 Bolts**

#### **Pros**

1. **Enhanced Strength and Durability** The forged I-beam design distributes stress more evenly across the rod, reducing the risk of fatigue failure compared to traditional rods. This is particularly beneficial for high-RPM applications, forced induction, and aggressive driving.

2. **Lightweight Construction** Forged aluminum rods are significantly lighter than steel, improving engine balance and reducing reciprocating mass. This can lead to better high-RPM performance and smoother operation.

3. **Improved Oil Flow** The design of I-beam rods often includes optimized oil passages, ensuring better lubrication to critical areas like the rod bolts and bearings. This helps prevent premature wear, especially under heavy loads.

4. **Compatibility with High-Performance Upgrades** These rods are designed to work seamlessly with ARP 2000 bolts (5.137" bolt circle), which are already a popular choice for high-stress applications. The combination of ARP bolts and Maxpeedingrods rods provides a robust foundation for turbocharged or naturally aspirated builds pushing significant power.

5. **Reduced Vibration and Stress Concentration** The I-beam shape minimizes stress risers compared to traditional rods, which can be prone to cracking at the rod caps or journals under extreme loads.

6. **Aftermarket Support and Reputation** Maxpeedingrods is a well-regarded brand in the high-performance aftermarket, known for producing reliable, precision-engineered components. Their rods are often used in racing and street tuning applications.

7. **Potential for Increased Power Output** By reducing reciprocating mass and improving structural integrity, these rods can help the engine handle higher boost levels or more aggressive camshaft profiles without compromising reliability.

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#### **Cons**

1. **Higher Cost** Forged aluminum rods are more expensive than stock or aftermarket steel rods. The price reflects the advanced manufacturing process (forging, machining, and heat treatment) and the performance benefits they offer.

2. **Maintenance and Repair Challenges** If a rod fails (though rare with proper installation), replacing a forged aluminum rod is more costly than replacing a steel rod. Additionally, if the rod is damaged during installation or use, it may require professional machining or replacement.

3. **Installation Complexity** Installing forged rods requires careful attention to torque specifications, alignment, and gasket surfaces. Improper installation can lead to issues like oil leaks or rod bearing failure. Some builders may need to invest in specialized tools or seek professional help.

4. **Limited Availability of Replacement Parts** Unlike stock rods, which have widely available replacement parts (e.g., bearings, bolts), some aftermarket rod kits may have fewer options for individual components. This could be a concern if a specific part fails.

5. **Potential for Overkill in Mild Builds** If the engine is not heavily modified (e.g., stock or mildly turbocharged with low boost), the benefits of I-beam rods may not be fully realized. For such applications, a more budget-friendly rod upgrade (e.g., steel rods with ARP bolts) might suffice.

6. **Compatibility Considerations** While these rods are designed for the EJ20, EJ22, and EJ25 engines, ensuring perfect fitment requires verifying crankshaft and bearing journal sizes. Some builds may require additional machining or custom solutions.

7. **Learning Curve for Builders** For those new to high-performance engine building, the transition from stock or mild aftermarket rods to forged I-beam rods may involve learning new techniques for balancing, alignment, and torque procedures.

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### **Conclusion**

Maxpeedingrods 91UG8F I-beam connecting rods are an excellent choice for Subaru Impreza WRX STI engines (EJ20, EJ22, EJ25) that are being built for serious performance, particularly with turbocharging, high boost, or aggressive tuning. Their forged aluminum construction offers superior strength-to-weight ratios, improved durability, and better oil flow compared to traditional rods. When paired with ARP 2000 bolts, this combination provides a robust foundation for high-stress applications, reducing the risk of catastrophic failure and enabling the engine to handle higher power outputs.

However, the higher cost and installation complexity mean they are best suited for builders who are committed to a high-performance project and have the budget and expertise to handle the upgrade properly. For milder builds or those on a tighter budget, alternative rod options (e.g., steel rods with ARP bolts) may offer adequate performance without the premium price tag.

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### **Recommendation**

**Use Maxpeedingrods 91UG8F I-beam rods if:**

- You are building a **high-performance turbocharged or naturally aspirated EJ engine** pushing significant power (e.g., 600 hp or high boost levels).

- You are already using **ARP 2000 bolts** and want a complete high-stress solution.

- You prioritize **reduced reciprocating mass, improved durability, and optimized oil flow** for longevity and performance.

- You have the **budget and experience** to install them correctly (or are willing to seek professional help).

**Consider alternatives if:**

- Your build is **mildly modified** (e.g., stock or low-boost turbo) and you want to save costs.

- You are unsure about the **installation process** and lack access to proper tools or expertise.

- You prefer **steel rods** for their lower cost and easier availability of replacement parts.

For most **serious WRX STI builds** targeting high power levels, the Maxpeedingrods rods are a **strong recommendation** they are a proven upgrade that enhances reliability and performance when paired with the right supporting components. Always ensure the rest of the engine (crankshaft, bearings, oil system) is upgraded accordingly to complement the rods.

Details:

Advertised Horsepower Rating:200HP/piece, Top acceleration: 9000rpm, package size 28CM 21CM 10CM. Guaranteed Fitment Always the correct part. For Subaru Impreza WRX STI EJ20 EJ22 EJ25 Engine, Legacy Forester 2.0L Turbo EJ205 Engine 2002 - 2005, STi EJ207 1998 -present, 2.5L EJ255 2006 -2014, EJ257 2004 -2016, Saab 9-2X 2005 - 2006, Isuzu Asoka 1990 -1993, 1989 -2009, for SF series 1997 - 2002 , XT 2004 -2013, Outback 2005, 2007 -2009, Impreza 95-01, 95-96. Each rod is magnetic particle tested to ensure free of flaws, 10.Use X-rated, sonic tested, 11.Custom Service.

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.

part #: 91ug8f price

  • $232.00

specifications pistonrinro:

  • for models: Ej22, Ej25, Wrx, Sti, Impreza
  • for makes: Subaru
  • for years: 2000
  • brand: Maxpeedingrods
  • mpn: 91ug8f
  • part type: Rod
  • big end diameter: 55mm/2.165
  • big end width: 21.4mm/0.843
  • california prop 65 warning: California Prop 65 Warning
  • country of origin: China
  • note: No Instruction Included
  • notice: This Is Aftermarket Replcement Part.
  • pin type: Bronzed Bushing Floating Pin
  • rod length: 130.5mm/5.137
  • small end diameter: 23mm/0.905
  • weight tolerance: Balanced To / 1 Gram In Set

offer pistonrinro:

  • started: June 3, 2026
  • availability: In Stock
  • options: Ship-to-home
  • sold: 0
  • quantity: 5
  • best offers: True

seller pistonrinro:

  • rating: 99.8%
  • city: Rowland height, California
  • # reviews: 12343

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returns pistonrinro:

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

shipping pistonrinro:

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

general pistonrinro:

  • condition: New
  • Car Truck Parts Accessories > Engines Engine Parts > Connecting Rods Parts
for models: ej22, ej25, wrx, sti, impreza, for makes: subaru, for years: 2000, part type: rod, big end diameter: 55mm/2.165, big end width: 21.4mm/0.843, california prop 65 warning: california prop 65 warning, country of origin: china, note: no instruction included, notice: this is aftermarket replcement part., pin type: bronzed bushing floating pin, rod length: 130.5mm/5.137, small end diameter: 23mm/0.905, weight tolerance: balanced to / 1 gram in set,
category: auto parts > car truck parts accessories > engines engine parts > connecting rods parts, sku: 13926532167886762,
Maxpeedingrods 91UG8F Is Similar To:
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1 offer $232.00 USD
  • New other (see details). Offer #1 priced at $232.00 + $20.00 shipping estimate = $252.00* total. Forged 4340 steel. Item: MaxpeedingRods Forged Connecting Rods.+$20.00 shipping

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