1. Pistons, Rings, Rods & Parts Engines Components For Sale
  2. sku: 12403885146727772
  3. MAXPEEDINGRODS KW7GN1

MAXPEEDINGRODS KW7GN1 Beam Connecting Rods Conrods Saloon 6PCS 72-81

fits model: E36, E46, 528i. make: Bmw.

Kw7gn1 Maxpeedingrods 6pcs I-beam Connecting Rods Conrods For Bmw 5 Series E36 E46 72-81 Saloon 528i

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: KW7GN1 ), ( Part Type: Rod ), ( Big End Diameter: 48mm/1.89 ), ( Big End Width: 21.9mm/0.862 ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Center To Center Length: 135mm/5.315 ), ( Horse Power: Single ), ( Complete Set: 600-800hp ), ( Material: Forged 4340 Aircraft Chrome Moly Quality Steel ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part ), ( Pin Type: Bronzed Bushing Floating Pin ), ( Quantity: 6 Pieces As Showing In Picture ), ( Small End Diameter: 22mm/0.866 ), ( Strength Of The Fastening: Psi , 000 Psi, The Optional Arp L19 Material At 260, 000 Psi ), ( Weight Tolerance: Balanced To / 1 Gram In Set )

Review MAXPEEDINGRODS 6pcs I beam Connecting Rods Conrods Bmw Series 72-81 Saloon fits E36 E46 528I

The **Maxpeedingrods KW7GN1 6-Piece I-Beam Connecting Rods** represent a premium upgrade for BMW E36 and E46 saloon models (1972 1981 for the E36 528i, though more accurately referring to the E36 generation spanning 1987 1999 and E46 from 1998 2005) seeking enhanced performance, durability, and reliability in their M50, M52, or M54 engine applications. Designed with precision engineering, these **forged I-beam connecting rods** are meticulously crafted from high-grade **4340 chromium-molybdenum alloy steel**, a material renowned for its exceptional strength-to-weight ratio and resistance to fatigue, ensuring they can withstand the extreme stresses of high-performance driving, forced induction, or aggressive tuning scenarios. Unlike standard stamped or cast rods, these I-beam rods feature a **closed-end design** with **fully machined surfaces**, eliminating potential weak points and reducing the risk of catastrophic failure under heavy loads. The **6-piece set** includes all necessary rods for a complete engine rebuild or upgrade, ensuring balanced performance and optimal power transfer from the crankshaft to the pistons. Each rod is **heat-treated and stress-relieved** to achieve maximum hardness and dimensional stability, while the **precision-ground journals** and **optimized wall thickness** enhance rigidity, reducing rod bounce and improving overall engine efficiency. Whether you're preparing your BMW for a **turbocharged build, nitrous oxide injection, or high-revving applications**, these connecting rods deliver the structural integrity and performance gains required to push your engine beyond stock limits. Built to meet or exceed OEM specifications while incorporating advanced manufacturing techniques, the Maxpeedingrods KW7GN1 rods are an ideal choice for enthusiasts demanding **uncompromising strength, longevity, and performance** in their BMW s powerplant.

### **Pros and Cons of Buying Maxpeedingrods KW7GN1 6-Piece I-Beam Connecting Rods for BMW E36/E46 (72-81 Saloon, 528i)**

#### **Pros:**

1. **Enhanced Durability** I-beam connecting rods are significantly stronger than traditional forged or cast rods, reducing the risk of catastrophic failure under high stress. This is particularly beneficial for engines running forced induction or modified power outputs.

2. **Improved Strength-to-Weight Ratio** The design distributes stress more evenly across the rod, allowing for better power transfer while maintaining a lighter overall weight compared to heavy forged alternatives.

3. **Compatibility with Performance Modifications** These rods are designed to handle higher RPMs and increased torque, making them suitable for engines with turbocharging, supercharging, or aggressive camshaft upgrades.

4. **OEM Replacement Potential** While not identical to OEM rods, they are a high-quality aftermarket alternative that can be used as a direct replacement if original rods are damaged or worn.

5. **Reduced Vibration** The I-beam construction helps minimize rod flex, leading to smoother operation and less internal engine stress over time.

6. **Long-Term Reliability** Properly installed and maintained, these rods can significantly extend the lifespan of a modified engine, especially under heavy loads.

7. **Widely Available Support** Maxpeedingrods is a reputable brand with good customer service, and these rods are commonly used in BMW tuning communities, making troubleshooting and parts sourcing easier.

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#### **Cons:**

1. **Cost** These rods are more expensive than standard aftermarket or OEM replacements, which may be a barrier for budget-conscious buyers.

2. **Installation Complexity** Replacing connecting rods requires advanced mechanical skill, specialized tools (like a rod jig and proper torque specifications), and often the removal of the engine from the vehicle. Improper installation can lead to catastrophic failure.

3. **Limited Stock Availability** While not uncommon, these rods may not be in stock at all local shops, requiring online ordering with potential shipping delays.

4. **Not a "Drop-In" Solution** Unlike some performance parts, these rods require careful inspection of the crankshaft journals, bearings, and engine block for compatibility. A worn crank or block could still pose risks even with upgraded rods.

5. **Potential for Overkill** If the engine is not heavily modified (e.g., stock or mildly tuned), these rods may offer excessive strength without being necessary, making the investment less justified.

6. **Warranty Considerations** If the engine is under warranty (e.g., with a dealer or extended warranty), replacing rods with aftermarket parts may void coverage, depending on the warranty terms.

7. **Requires Supporting Upgrades** Simply installing these rods without upgrading other critical components (e.g., pistons, bearings, crankshaft, or oil system) could lead to premature wear or failure elsewhere in the engine.

---

### **Conclusion:**

Maxpeedingrods KW7GN1 I-beam connecting rods are an excellent choice for BMW E36/E46 owners who have modified their engines significantly (e.g., turbocharged, supercharged, or high-RPM applications) and are looking to enhance reliability and performance. They are not necessary for stock or mildly tuned engines but can be a wise investment for those pushing the limits of their motorsport or daily-driver builds.

The decision to purchase these rods should be based on:

- **Engine modifications** (are you running forced induction or aggressive tuning?).

- **Budget** (are you willing to invest in high-end components?).

- **Mechanical expertise** (can you or a trusted mechanic install them properly?).

- **Long-term goals** (do you plan to keep the engine at high power levels for years?).

If these rods align with your project s needs and you re prepared for the installation challenge, they are a strong upgrade. However, if your engine remains stock or lightly modified, the cost may not be justified.

### **Recommendation:**

- **For heavily modified E36/E46 engines (turbo/supercharged, high-RPM builds):** Proceed with confidence. These rods are a proven upgrade for reliability and power handling.

- **For stock or mildly tuned engines:** Consider less expensive alternatives (e.g., high-quality forged rods or OEM replacements) unless you have specific concerns about rod strength.

- **Always pair with supporting upgrades** (e.g., upgraded crankshaft, bearings, pistons, and oil system) to ensure the entire engine can handle the increased stress.

- **Consult a trusted BMW performance mechanic** before purchasing to confirm compatibility and installation requirements.

If you decide to move forward, ensure you have the proper tools, follow installation guidelines precisely, and consider a break-in period to allow the rods and bearings to seat correctly.

Details:

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. Fitment Details: For BMW 3 Series E36 1990 - 2000 325i 328i, E46 1998 2007 328i 330i 325 Ci 328 330 xi, 5 E12 1972-1981 Saloon 528I, 7 E38 1994 2001 728i X 728i, IL, Z3 1997 2003 Coupe 2.8i, Roadster 1995 2003 Convertible Pin Type: Floating Piston. For BMW 328i 528I E36 E46 M52B28 S52B32 M54B30 S52B30 M50B25.

Advertised Horsepower Rating:200HP/piece, Top acceleration: 9000rpm, package size 28CM 21CM 14CM.

part #: kw7gn1 price

  • $558.87

specifications pistonrinro:

  • for models: E36, E46, 528i
  • for makes: Bmw
  • brand: Maxpeedingrods
  • mpn: Kw7gn1
  • part type: Rod
  • big end diameter: 48mm/1.89
  • big end width: 21.9mm/0.862
  • california prop 65 warning: California Prop 65 Warning
  • center to center length: 135mm/5.315
  • horse power: Single
  • complete set: 600-800hp
  • material: Forged 4340 Aircraft Chrome Moly Quality Steel
  • note: No Instruction Included
  • notice: This Is Aftermarket Replcement Part
  • pin type: Bronzed Bushing Floating Pin
  • quantity: 6 Pieces As Showing In Picture
  • small end diameter: 22mm/0.866
  • strength of the fastening: Psi , 000 Psi, The Optional Arp L19 Material At 260, 000 Psi
  • weight tolerance: Balanced To / 1 Gram In Set

shipping pistonrinro:

  • class: Standard
  • carrier: FedEx
  • service: FedEx Ground / FedEx Home Delivery
  • cost: $0.00
  • transit: 5-9 Days
  • type: Fixed

seller pistonrinro:

  • # reviews: 1783
  • rating: 99.6%
  • city: Rowland height, California

general pistonrinro:

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

offer pistonrinro:

  • options: Ship-to-home
  • availability: In Stock
  • quantity: 1
  • sold: 0
  • started: February 15, 2026
  • best offers: True

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returns pistonrinro:

  • time: 30 Days
  • policy: Returns Accepted
  • paid by: Seller
for models: e36, e46, 528i, for makes: bmw, part type: rod, big end diameter: 48mm/1.89, big end width: 21.9mm/0.862, california prop 65 warning: california prop 65 warning, center to center length: 135mm/5.315, horse power: single, complete set: 600-800hp, note: no instruction included, notice: this is aftermarket replcement part, pin type: bronzed bushing floating pin, quantity: 6 pieces as showing in picture, small end diameter: 22mm/0.866, strength of the fastening: psi , 000 psi, the optional arp l19 material at 260, 000 psi, weight tolerance: balanced to / 1 gram in set,
category: auto parts > car truck parts accessories > engines engine parts > connecting rods parts, material: forged 4340 aircraft chrome moly quality steel, sku: 12403885146727772,
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