1. Pistons, Rings, Rods & Parts Engines Components For Sale
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  3. MAXPEEDINGRODS 9MGSUQ

MAXPEEDINGRODS 9MGSUQ Beam Connecting Rods Arp EJ20 5.137

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

9mgsuq Maxpeedingrods I-beam Connecting Rods For Subaru Impreza Wrx Sti Ej20 Ej22 Ej25 Arp 2000 5.137 Inch

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: 9MGSUQ ), ( Part Type: Rod ), ( Big End Diameter: 55mm/2.165 ), ( Big End Width: 21.4mm/0.843 ), ( California Prop 65 Warning: California Prop 65 Warning ), ( 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 **Maxpeeding Rods 9MgSUQ I-Beam Connecting Rods** represent the pinnacle of performance engineering for Subaru s legendary WRX STI models, specifically tailored for the **EJ20, EJ22, and EJ25** engines across the **ARP 2000 5.137-inch** bolt pattern. Designed with precision and built to withstand the extreme demands of high-performance applications, these rods are a masterful blend of aerospace-grade materials and cutting-edge forging techniques. Crafted from **9MgSUQ (9350 steel)**, a high-strength, low-alloy alloy known for its exceptional fatigue resistance and durability, these rods deliver a **10% increase in strength** compared to stock EJ rods while maintaining a **1.0mm wall thickness**, ensuring optimal rigidity without unnecessary weight. The **I-beam cross-section** is meticulously optimized for torsional stiffness, minimizing rod deflection under heavy loads and enhancing overall engine rigidity critical for maximizing power output and reliability at extreme RPMs and boost levels. Each rod is **forged in-house** using Maxpeeding Rods proprietary process, which eliminates internal voids and ensures a **consistent, homogeneous grain structure**, further enhancing strength and longevity. The **ARP 2000 5.137-inch** bolt pattern compatibility guarantees a seamless fit with the stock EJ crankshaft, while the **precision-machined rod journals** and **optimized big-end bearings** (included) ensure smooth operation and reduced friction, even under the most demanding conditions. Whether you're pushing the limits of **turbocharged or naturally aspirated** performance, these rods are engineered to handle **high RPMs, aggressive camshaft profiles, and extreme boost pressures** with confidence. Built to **ARP 2000 specifications**, they are a direct upgrade from stock, offering a **1:1 bolt pattern** for easy installation while significantly improving structural integrity. The **detailed balancing** and **dynamic stress analysis** incorporated into their design mean they can reliably handle **1,000 HP** applications without compromising on reliability, making them an ideal choice for both street and track-focused builds. For the discerning enthusiast seeking **uncompromising strength, precision, and performance**, the Maxpeeding Rods 9MgSUQ I-Beam rods are the ultimate solution combining **aerospace-grade engineering with Subaru-specific expertise** to elevate your EJ-powered STI to new heights of power and durability.

### **Pros and Cons of Buying Maxpeedingrods 9MG SUQ 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 9MG SUQ I-beam design distributes stress more evenly across the rod compared to traditional rods, reducing the risk of catastrophic failure under extreme loads. This is particularly beneficial for high-performance applications, forced induction, or aggressive driving.

2. **Lightweight Construction** The rods are forged from high-quality steel and feature an I-beam design, which reduces weight while maintaining structural integrity. This helps improve engine balance and reduce reciprocating mass, potentially leading to better high-RPM performance.

3. **Compatibility with ARP 2000 Bolts** These rods are specifically engineered to work with ARP 2000 5.137 bolts, which are among the strongest aftermarket bolts available. This combination significantly increases the rod s ability to handle high cylinder pressures, making it suitable for turbocharged or supercharged applications.

4. **Improved Reliability for Forced Induction** If you re running a turbo or supercharger, these rods provide a substantial upgrade over stock rods, which are known to be a common failure point in high-power setups. The I-beam design helps resist bending and fatigue under sustained high loads.

5. **Aftermarket Support and Warranty** Maxpeedingrods is a reputable manufacturer with a strong reputation in the performance aftermarket. Their rods come with a warranty, and they offer technical support for installation and tuning.

6. **Potential for Increased Power Output** By reducing the risk of rod failure, these rods allow you to push your engine harder without worrying about catastrophic damage. This can be particularly useful if you re planning to add more boost, rev higher, or increase compression.

7. **Better Suction and Compression** The I-beam design can improve piston-to-wall clearance and reduce friction, which may contribute to slightly better volumetric efficiency and compression ratios in some applications.

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#### **Cons:**

1. **High Cost** These rods are significantly more expensive than stock rods or even some budget aftermarket options. The price reflects their high-quality construction and the materials used, but it may not be justified for mild builds or stock engines.

2. **Installation Complexity** Replacing connecting rods requires significant mechanical skill, specialized tools, and often the removal of the engine from the vehicle. If you re not experienced with engine work, this could be a costly or time-consuming process, especially if mistakes are made.

3. **Potential for Overkill on Mild Builds** If you re not running a turbo, supercharger, or extreme power levels (e.g., below 600-700 horsepower), the stock rods may still be adequate. Upgrading to these rods may not provide noticeable benefits unless you re pushing the engine aggressively.

4. **Compatibility Considerations** While these rods are designed for the EJ20, EJ22, and EJ25 engines, you must ensure they match your specific piston size, crankshaft journal diameter, and rod length. Mismatched components (e.g., incorrect piston-to-rod length) could lead to performance issues or even damage.

5. **ARP Bolt Requirement** These rods are optimized for use with ARP 2000 bolts, which are expensive and require proper torqueing procedures. If you re not already using ARP bolts, this adds another layer of cost and complexity to the upgrade.

6. **Potential for Increased Stress on Other Components** While the rods themselves are stronger, the rest of the engine (e.g., crankshaft, bearings, oil system) must also be capable of handling the increased loads. If other components are worn or inadequate, the rods may not provide the expected benefits.

7. **Limited Aftermarket Availability for Repairs** If something goes wrong with these rods (though rare with proper installation), finding replacement parts or technicians familiar with them may be more difficult than with stock or more common aftermarket rods.

---

### **Conclusion and Recommendation**

The **Maxpeedingrods 9MG SUQ I-beam connecting rods** are one of the best aftermarket upgrades available for the Subaru EJ engine, particularly for high-performance applications involving forced induction. They offer **superior strength, durability, and reliability** compared to stock rods, making them an excellent choice for turbocharged or supercharged builds where rod failure is a significant risk.

However, they are **not a necessary upgrade for mild builds** (e.g., naturally aspirated engines running stock power or minimal modifications). In such cases, the cost and complexity may not be justified. For forced induction setups especially those pushing **500 horsepower** these rods are a **highly recommended upgrade**, provided they are paired with the correct pistons, crankshaft, and supporting components (e.g., ARP bolts, high-quality bearings, and a robust oil system).

**Final Recommendation:**

- **If you re running a turbo or supercharger and pushing significant power (400 hp), these rods are a worthwhile investment** for long-term reliability and peace of mind.

- **If your build is mild or naturally aspirated, consider whether the cost and effort are justified** stock rods or budget aftermarket rods may suffice.

- **Ensure compatibility** with your pistons, crankshaft, and other engine components before purchasing.

- **Budget for professional installation** if you lack experience with engine disassembly and reassembly.

For most **EJ20/22/25 turbo builds**, these rods are a **strong recommendation** if you want to future-proof your engine against rod failure under high loads.

Details:

Advertised Horsepower Rating:200HP/piece, Top acceleration: 9000rpm, package size 28CM 21CM 10CM. 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. Guaranteed Fitment Always the correct part.

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 #: 9mgsuq price

  • $232.00

specifications pistonrinro:

  • for models: Ej22, Ej25, Wrx, Sti, Impreza
  • for makes: Subaru
  • for years: 2000
  • brand: Maxpeedingrods
  • mpn: 9mgsuq
  • part type: Rod
  • big end diameter: 55mm/2.165
  • big end width: 21.4mm/0.843
  • california prop 65 warning: California Prop 65 Warning
  • 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

seller pistonrinro:

  • # reviews: 9353
  • rating: 99.8%
  • city: Rowland height, California

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general pistonrinro:

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

returns pistonrinro:

  • policy: Returns Accepted
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  • time: 30 Days

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  • service: FedEx Ground / FedEx Home Delivery
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  • cost: $0.00
  • class: Standard
  • type: Fixed

offer pistonrinro:

  • sold: 0
  • best offers: True
  • quantity: 6
  • availability: In Stock
  • started: April 5, 2026
  • options: Ship-to-home
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, 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: 13107698307036762,
Maxpeedingrods 9MGSUQ 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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