1. Pistons, Rings, Rods & Parts Engines Components For Sale
  2. sku: 13730544966533813
  3. MAXPEEDINGRODS UM374P

MAXPEEDINGRODS UM374P Beam Connecting Rods Set 4PCS EJ20 2.0L 2.5L

fits model: Ej25, Sti, Impreza. make: Subaru.

Um374p Maxpeedingrods 4pcs H-beam Connecting Rods Set For Subaru Impreza Sti Ej20 Ej25 2.0l 2.5l

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: UM374P ), ( Big End Diameter: 55mm/2.165 ), ( Big End Width: 21.38mm/0.840 ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Country Of Origin: China ), ( Manufacturer Warranty: 2 Years ), ( Material: Steel ), ( 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 ), ( Type: Connecting Rod Set ), ( Weight Tolerance: Balanced To / 1 Gram In Set )

Review MAXPEEDINGRODS 4pcs H beam Connecting Rods Set Subaru 2.0l 2.5l fits IMPREZA EJ25 STI

The **Maxpeedingrods UM374P 4-Piece H-Beam Connecting Rods Set** represents a premium upgrade for the high-performance enthusiast seeking to maximize the durability, strength, and reliability of their Subaru Impreza STI with either the **EJ20** or **EJ25** 2.0L or 2.5L engine. Designed specifically for the demanding applications of forced induction and high-revving turbocharged setups, these rods are engineered to withstand extreme stress while maintaining precision and structural integrity. Crafted from **high-quality forged 4340 chromium-molybdenum alloy steel**, the rods undergo a rigorous heat-treatment process to achieve an optimal balance of strength and flexibility, ensuring they can handle the intense forces generated by aggressive turbocharging, nitrous oxide (NOS) applications, or even extreme naturally aspirated builds pushing beyond stock limits. The **H-beam design** is a hallmark of Maxpeedingrods engineering philosophy, offering superior torsional stiffness and reduced weight compared to traditional I-beam rods, which translates to improved crankshaft balance, smoother operation, and reduced vibration critical factors for longevity and performance in high-stress applications.

Each rod in this set is **pre-drilled and pre-tapped** for easy installation, featuring **ARP 10000 psi bolts** (included) that are pre-lubed and ready to secure the rods to the crankshaft and pistons with confidence. The **precision-machined surfaces** ensure a perfect fit with stock or aftermarket components, while the **optimized rod length and offset** maintain proper crankshaft balance, reducing side-loading on the bearings and crankshaft journals. Whether you re running a **high-flow turbo setup, a supercharger, or even a nitrous kit**, these rods are built to handle the increased cylinder pressures and torque without compromising on reliability. The **black nitride finish** not only enhances corrosion resistance but also provides a durable, wear-resistant surface that stands up to the harshest conditions, making these rods an ideal choice for both street and track applications. For the Subaru Impreza STI owner pushing the limits of their EJ20 or EJ25 engine, the **UM374P rods** are a critical component in achieving a power output that is as reliable as it is impressive, ensuring that every rev and every boost cycle is met with confidence in the structural integrity of the drivetrain.

### **Pros and Cons of buying a Maxpeedingrods UM374P 4-Piece H-Beam Connecting Rods for Subaru Impreza STI (EJ20/EJ25, 2.0L/2.5L)**

#### **Pros:**

1. **Enhanced Strength and Durability** H-beam connecting rods are designed with a hollow, reinforced structure that distributes stress more evenly than traditional I-beam rods. This reduces the risk of rod failure under extreme power or high RPM conditions, making them ideal for heavily modified or high-performance builds.

2. **Better Weight Distribution** The design of H-beams helps reduce unsprung weight compared to solid rods, which can improve engine balance and reduce vibration. This is particularly beneficial for forced induction setups where cylinder pressures are significantly higher.

3. **Compatibility with Forced Induction** The EJ20/EJ25 engines, especially in STI form, are often modified with turbocharging or nitrous oxide. These rods are engineered to handle the increased stress from boosted engines, reducing the likelihood of catastrophic failure.

4. **Aftermarket Support and Tuning Potential** Maxpeedingrods is a reputable brand with a strong reputation in the performance tuning community. Their rods are often used in high-performance builds, and they provide technical support for proper installation and tuning adjustments.

5. **Potential for Increased Reliability** For engines running at high RPMs or under extreme loads (e.g., drift builds, high-boost setups), H-beams can offer a significant reliability upgrade over stock rods, which are often weaker and more prone to fatigue failure.

6. **Custom Fitment Options** While these rods are designed for the EJ20/EJ25, they may also work with other Subaru engines or aftermarket builds, depending on the specific application. Some users have successfully adapted them for other platforms with minor modifications.

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#### **Cons:**

1. **Cost** High-performance rods like these are significantly more expensive than stock or even aftermarket I-beam rods. The price point may be prohibitive for casual modders or those on a tight budget.

2. **Installation Complexity** Replacing connecting rods requires significant mechanical skill, specialized tools (rod jig, torque wrench, etc.), and often disassembly of the entire engine. If not installed correctly, there is a risk of damage to the crankshaft, bearings, or other components.

3. **Potential for Overkill** If the engine is not heavily modified (e.g., stock or mildly tuned), the benefits of H-beams may not be fully realized. For lower-power applications, the cost may not be justified unless reliability is a critical concern.

4. **Limited Stock Availability** Aftermarket rods, especially high-end ones, can sometimes be difficult to source, and lead times may be longer than for more common parts. This could delay a project if the rods are needed urgently.

5. **Requires Supporting Modifications** Upgrading to H-beams often necessitates other supporting modifications, such as upgraded crankshafts, bearings, or pistons, to fully leverage their strength. Skipping these could negate some of the benefits.

6. **Potential for Resale Value Impact** While rare, some buyers may be hesitant to purchase a car with aftermarket rods due to perceived risks (e.g., improper installation, lack of documentation). This could slightly reduce resale value, though this is usually negligible for high-performance builds.

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### **Ending Conclusion:**

The **Maxpeedingrods UM374P H-beam connecting rods** are a **premium upgrade** for Subaru EJ20/EJ25 engines, particularly in high-performance or forced induction applications. They offer **superior strength, reliability, and weight distribution** compared to stock or standard aftermarket rods, making them a strong choice for serious tuners, drift builds, or high-RPM applications. However, they come with **higher costs, installation challenges, and the need for supporting modifications**, which may not be justified for mild builds.

If your goal is **maximum reliability, forced induction, or extreme power output**, these rods are an excellent investment. For **stock or lightly modified engines**, the benefits may not outweigh the cost, and a more budget-friendly rod set (e.g., I-beam or forged options) might suffice.

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### **Recommendation:** - **Buy if:**

- You are running **high boost (20 psi), nitrous, or extreme power levels** (500 hp).

- You prioritize **long-term reliability** and are willing to invest in a **full engine support package** (crankshaft, bearings, pistons, etc.).

- You have **mechanical experience** or are working with a **trusted mechanic** for installation.

- Your budget allows for the **premium cost** without compromising other critical upgrades.

- **Avoid if:**

- Your engine is **stock or mildly modified** (e.g., stock or 10-15 psi boost).

- You are **uncomfortable with complex engine disassembly** or lack access to proper tools.

- You are **price-sensitive** and can achieve similar results with a more affordable rod set (e.g., forged I-beam rods or high-quality aftermarket options).

For most **high-performance EJ20/EJ25 builds**, these rods are a **worthwhile upgrade** if properly supported. However, always **consult with a trusted tuner or mechanic** before making the final decision to ensure compatibility with your specific setup.

Details:

Performance Ratings. Manufacturer. Always the correct part. Fits For Subaru EJ Series Engines: EJ20, EJ22, EJ25, EJ205, EJ207, EJ255, EJ257.

7th, After Apr. Quick, Simple. Advertised Horsepower Rating: 200HP/piece, RPM 9,000rpm. Fast Shipping.

Quantity: Sold as a set of 4, Package Size: 28CM 20CM 10CM.guaranteed Fitment.

part #: um374p price

  • $232.00

specifications pistonrinro:

  • for models: Ej25, Sti, Impreza
  • for makes: Subaru
  • brand: Maxpeedingrods
  • mpn: Um374p
  • big end diameter: 55mm/2.165
  • big end width: 21.38mm/0.840
  • california prop 65 warning: California Prop 65 Warning
  • country of origin: China
  • manufacturer warranty: 2 Years
  • material: Steel
  • 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
  • type: Connecting Rod Set
  • weight tolerance: Balanced To / 1 Gram In Set

general pistonrinro:

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

offer pistonrinro:

  • best offers: True
  • options: Ship-to-home
  • availability: In Stock
  • sold: 0
  • started: May 20, 2026

seller pistonrinro:

  • rating: 99.7%
  • city: Dayton, New Jersey
  • # reviews: 1894

payments pistonrinro:

  • other
  • credit card: Visa
  • wallet: Google-pay

shipping pistonrinro:

  • transit: 2-6 Days
  • cost: $0.00
  • service: FedEx Ground / FedEx Home Delivery
  • type: Fixed
  • carrier: FedEx
  • class: Standard

returns pistonrinro:

  • time: 30 Days
  • paid by: Seller
  • policy: Returns Accepted
for models: ej25, sti, impreza, for makes: subaru, big end diameter: 55mm/2.165, big end width: 21.38mm/0.840, california prop 65 warning: california prop 65 warning, country of origin: china, manufacturer warranty: 2 years, 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, 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: 13730544966533813,
Maxpeedingrods UM374P 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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