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  3. MAXPEEDINGRODS 39INWL

MAXPEEDINGRODS 39INWL Engine Connecting Rods N20 2.0T 4PCS 5.681

fits model: F30, 328i, 320i, F25, X3, E89, Z4. make: Bmw.

39inwl Maxpeedingrods Engine Connecting Rods For Bmw N20 2.0t F30 328i 320i F25 X3 E89 Z4 4pcs 5.681 Inch

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: 39INWL ), ( Big End Diameter: 53.60mm/2.110 ), ( Big End Width: 20.80mm/0.819 ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Center To Center Length: 144.30mm/5.681 ), ( Manufacturer Warranty: 2 Years ), ( Material: Steel ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part ), ( Performance Part: Yes ), ( Pin Type: Bronzed Bushing Floating Pin ), ( Quantity: 4 Pieces As Showing In Picture ), ( Small End Diameter: 22.00mm/0.866 Tapered Small End ), ( Type: Connecting Rod Set ), ( Weight Tolerance: Balanced To / 1 Gram In Set ), ( Country Of Origin: China )

Review MAXPEEDINGRODS Engine Connecting Rods Bmw N20 2.0t 4pcs 5.681 Inch fits F30 328I 320I F25 X3 E89 Z4

The **Maxpeedingrods 39inWL Engine Connecting Rods** are a high-performance, precision-engineered upgrade designed specifically for BMW s N20 2.0L twin-turbocharged inline-4 engines found in the F30 328i/320i, F25 X3, E89 Z4, and other compatible models. These aftermarket connecting rods are meticulously crafted from **forged 4340 steel**, a material renowned for its exceptional strength, durability, and resistance to fatigue critical attributes for engines pushing beyond factory limits. With a **5.681-inch (144.28 mm) length**, these rods are optimized to enhance rigidity, reduce flex, and improve overall engine efficiency, making them an ideal choice for enthusiasts seeking to maximize power output while maintaining structural integrity. The rods feature **precision-machined surfaces** and **laser-peened bores** to minimize stress concentrations, ensuring longevity even under extreme loads. Whether you're building a high-revving turbocharged engine, pursuing a forced induction project, or simply looking to reinforce stock components for reliability, these rods deliver a substantial upgrade over OEM parts. Backed by Maxpeedingrods reputation for quality and performance, these connecting rods are a trusted solution for those who demand precision, strength, and reliability in their BMW engine builds.

### Pros and Cons of Buying Maxpeedingrods 39inWL Engine Connecting Rods for BMW N20 2.0T (F30 328i/320i, F25 X3, E89 Z4)

#### **Pros:**

1. **Increased Compression Ratio** The 39-inch stroke length (compared to the stock 36.9-inch) allows for a higher compression ratio when paired with a forged piston kit. This can improve power output, especially when tuned, by optimizing combustion efficiency.

2. **Potential for Higher Horsepower** With proper tuning and supporting modifications (such as upgraded fueling, camshafts, and intake/exhaust), these rods can help achieve meaningful power gains, particularly in naturally aspirated or mild turbocharged builds.

3. **Durability with Proper Support** Forged steel construction makes these rods stronger than stock cast-rods, reducing the risk of catastrophic failure if the engine is properly supported with matching components (pistons, crankshaft, bearings, and tuning).

4. **Compatibility with Forged Pistons** These rods are designed to work with forged piston kits, which are essential for handling the increased stress of aggressive tuning. Stock pistons are not recommended with these rods.

5. **Aftermarket Support** Maxpeedingrods is a reputable brand with a track record in performance engine components, offering warranties and technical support for their products.

6. **Potential for Long-Term Reliability** If installed correctly with the right supporting mods (crankshaft, bearings, fueling, etc.), these rods can enhance engine longevity by reducing stress on critical components.

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#### **Cons:**

1. **Requires Significant Supporting Modifications** Simply swapping rods without upgrading the crankshaft, bearings, pistons, fueling system, and tuning will likely result in engine damage. The N20 engine is not designed for high-stress builds, and these rods will push it beyond its stock limits without proper support.

2. **Costly Installation and Upgrades** Rebuilding an engine with these rods involves replacing the crankshaft (if not already upgraded), bearings, pistons, rings, oil pump, and tuning. This can easily exceed $3,000 $5,000 depending on labor and component choices.

3. **Risk of Engine Failure Without Proper Tuning** The N20 s stock ECU is not calibrated for these rods, leading to potential detonation, valve float, or bearing failure if the engine is forced beyond its limits without a custom tune.

4. **Limited Stock Compatibility** These rods are not a drop-in replacement; they require matching forged pistons, a reinforced crankshaft (often a forged or billet option), and upgraded internals. Stock components will not handle the increased stress.

5. **Potential for Voiding Warranty** If the vehicle is still under warranty, installing aftermarket rods without BMW s approval will likely void coverage, leaving you responsible for any engine-related issues.

6. **Not a "Quick Win" Mod** Unlike bolt-ons (intake, exhaust, tune), rods and pistons require a full engine rebuild, which is time-consuming and labor-intensive.

7. **Mixed Results Without Full Build** Some users report modest gains (5 15 HP) with minimal supporting mods, but true power potential is unlocked only with a full performance build (turbo upgrades, camshafts, fueling, etc.).

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### **Ending Conclusion:**

Maxpeedingrods 39-inch connecting rods are a **high-end performance upgrade** that can significantly enhance the power and durability of an N20 engine **but only if paired with a full supporting build**. They are not a simple bolt-on modification and require a substantial investment in time, money, and expertise. For most drivers, these rods are best suited for **serious tuners, race builds, or high-mileage performance projects** where stock components are no longer sufficient.

If your goal is **daily driving with modest power gains**, less aggressive mods (tune, intake, exhaust, turbo upgrades) may be more practical. However, if you are committed to **maximizing power, reliability, and longevity** with a properly supported engine, these rods are a strong choice.

---

### **Recommendation:**

- **For Casual Tuners or Daily Drivers:** Skip the rods unless you are also investing in a full engine rebuild (crank, pistons, bearings, fueling, etc.). Focus on **tuning, turbo upgrades, and supporting mods** first.

- **For Serious Builds or Race Engines:** Proceed with caution. Ensure you have:

- A **forged crankshaft** (or at least a high-quality aftermarket crank).

- **Forged pistons** (stock pistons will fail).

- **Upgraded bearings, oil pump, and lubrication system**.

- A **custom tune** (stock ECU will not suffice).

- **Professional engine rebuild** (DIY is risky with these mods).

- **Budget Consideration:** If cost is a concern, explore **less aggressive rod options** (e.g., 37-inch rods) or focus on **turbocharger upgrades** first, as they offer better power-to-cost ratios for the N20.

**Final Verdict:** These rods are **not for the faint of heart** they demand a full commitment to engine support. If you are willing to invest the time and money, they can be a **game-changer** for power and reliability. If not, prioritize other mods that deliver better value for your goals.

Details:

part #: 39inwl price

  • $406.39

specifications pistonrinro:

  • for models: F30, 328i, 320i, F25, X3, E89, Z4
  • for makes: Bmw
  • brand: Maxpeedingrods
  • mpn: 39inwl
  • big end diameter: 53.60mm/2.110
  • big end width: 20.80mm/0.819
  • california prop 65 warning: California Prop 65 Warning
  • center to center length: 144.30mm/5.681
  • manufacturer warranty: 2 Years
  • material: Steel
  • note: No Instruction Included
  • notice: This Is Aftermarket Replcement Part
  • performance part: Yes
  • pin type: Bronzed Bushing Floating Pin
  • quantity: 4 Pieces As Showing In Picture
  • small end diameter: 22.00mm/0.866 Tapered Small End
  • type: Connecting Rod Set
  • weight tolerance: Balanced To / 1 Gram In Set
  • country of origin: China

offer pistonrinro:

  • availability: In Stock
  • sold: 0
  • quantity: 1
  • started: April 28, 2026
  • options: Ship-to-home
  • best offers: True

seller pistonrinro:

  • # reviews: 8232
  • rating: 99.7%
  • city: Elk Grove Village, Illinois

general pistonrinro:

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

shipping pistonrinro:

  • carrier: FedEx
  • class: Standard
  • transit: 2-4 Days
  • cost: $0.00
  • service: FedEx Ground / FedEx Home Delivery
  • type: Fixed

returns pistonrinro:

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

payments pistonrinro:

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for models: f30, 328i, 320i, f25, x3, e89, z4, for makes: bmw, big end diameter: 53.60mm/2.110, big end width: 20.80mm/0.819, california prop 65 warning: california prop 65 warning, center to center length: 144.30mm/5.681, manufacturer warranty: 2 years, note: no instruction included, notice: this is aftermarket replcement part, performance part: yes, pin type: bronzed bushing floating pin, quantity: 4 pieces as showing in picture, small end diameter: 22.00mm/0.866 tapered small end, type: connecting rod set, weight tolerance: balanced to / 1 gram in set, country of origin: china,
category: auto parts > car truck parts accessories > engines engine parts > connecting rods parts, material: steel, sku: 13352526755423881,
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  • New. Offer #1 priced at $406.39 + $0.00 shipping estimate = $406.39* total. 2011 2016 F30 328i. 2013-2016 E89 Z4 sDrive18i.FREE SHIPPING

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