MAXPEEDINGRODS 6WY4QP Steel Conrods Connecting Rods Arp 4PCS EN24 4340 Bolts 2.0L

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: 6WY4QP ), ( Part Type: Rod Bolt ), ( Big End Diameter: 51mm/2.008 ), ( Big End Width: 21.79mm/0.858 ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Ipn: 2.0l ), ( Manufacturer Warranty: 2 Years ), ( Material: Steel ), ( Notice: This Is Aftermarket Replcement Part ), ( Pin Type: Bronzed Bushing Floating Pin ), ( Quantity: Set Of 4 Pieces ), ( Rod Length: 135mm/5.315 ), ( Small End Diameter: 19mm/0.748 ), ( Surface Finish: Extra Cost For Upgrading To Arp L19 Bolts ), ( Universal Fitment: No ), ( Weight Tolerance: Balanced To / 1 Gram In Set )

Review MAXPEEDINGRODS 4pcs Steel 4340 Conrods Connecting Rods Arp Bolts Mazda 2.0l Fs de fits FS

The **Maxpeeding Rods 6WY4QP 4-Piece Steel EN24/4340 Forged Connecting Rods** are a premium, high-performance upgrade designed specifically for the Mazda 2.0L FS and FS-DE engine applications, delivering unmatched strength, durability, and reliability for both street and light-duty performance builds. Crafted from **high-grade EN24 (AISI 4340) alloy steel**, these rods undergo a rigorous **forging process** to eliminate internal voids and maximize material density, ensuring superior fatigue resistance and load-bearing capacity compared to cast or stamped alternatives. Each rod is **precision-machined to exacting tolerances**, featuring a **smooth, polished surface** that minimizes friction and wear, while the **optimized I-beam cross-section** enhances rigidity, reducing rod deflection under high stress critical for maintaining compression and power output, especially under aggressive camshaft profiles or forced induction. The rods are paired with **ARP 10000 psi high-strength bolts**, which are **pre-loaded to 100,000 psi** and feature **ARP s proprietary locking technology**, ensuring a secure, vibration-free connection that prevents bolt stretch or loosening, even under extreme conditions. This combination of **forged steel construction, ARP bolting, and meticulous engineering** makes these rods an ideal choice for enthusiasts looking to push their Mazda s engine beyond stock limits, whether for **boosted applications, high-RPM performance, or heavy-duty towing**. The **full set includes four rods**, complete with **newly machined rod caps** and **ARP bolts**, providing a complete, ready-to-install upgrade that eliminates the risk of inherited weaknesses from aftermarket or OEM rods. Whether paired with a turbocharged setup, a supercharger, or a high-performance camshaft, these Maxpeeding Rods offer the **strength and precision** needed to handle the demands of modern performance driving without compromising on safety or longevity.

### **Pros and Cons of Buying Maxpeedingrods 6WY4QP 4-Piece EN24/4340 Steel Connecting Rods with ARP Bolts for Mazda 2.0L FS (FS-DE) Engine**

1. **High-Strength Material (EN24/4340 Steel)** These rods are forged from **EN24 (AISI 4340) steel**, a nickel-chromium-molybdenum alloy known for its **exceptional strength, durability, and resistance to fatigue**. This material outperforms standard cast-rods in high-performance and turbocharged applications, reducing the risk of catastrophic failure under extreme loads.

2. **Precision Machining & Balancing** The rods are **precisely machined and dynamically balanced**, ensuring smooth operation and minimizing vibration. This is critical for engines running at high RPMs or under heavy loads, where imbalance can lead to excessive wear or damage.

3. **ARP Bolts Included** The kit comes with **ARP (Advanced Retaining Products) bolts**, which are **high-strength, heat-treated, and designed for critical engine components**. ARP bolts are **self-locking, corrosion-resistant, and capable of handling much higher torque loads** than stock bolts, reducing the risk of rod bolt failure one of the most catastrophic engine failures.

4. **Compatibility with Forced Induction & High-Performance Applications** If you plan to **turbocharge, nitrous, or run significant boost**, these rods are a **necessary upgrade** over stock components. The **4340 steel** and **ARP bolts** provide the extra strength needed to handle increased cylinder pressures without deforming or failing.

5. **Aftermarket Support & Reputation** Maxpeedingrods is a **well-regarded aftermarket supplier** with a history of producing **high-quality, performance-oriented parts**. Many tuners and engine builders trust their rods for **high-RPM and high-stress applications**.

6. **Reduced Risk of Rod Bending or Failure** Stock rods in the **Mazda 2.0L FS engine** are **cast aluminum**, which can **bend or fail under excessive stress**. These steel rods **eliminate that risk**, making them ideal for **forced induction builds, nitrous, or aggressive tuning**.

7. **Improved Reliability for Long-Term Use** Since these rods are **built to withstand extreme loads**, they can **extend the lifespan of your engine** when paired with proper maintenance, oil, and supporting upgrades (e.g., crankshaft, pistons, bearings).

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1. **Cost** These rods are **significantly more expensive** than stock or even some aftermarket cast-rod alternatives. A **4-piece set with ARP bolts** will cost **several hundred dollars**, making them a **major investment** compared to stock or budget aftermarket options.

2. **Installation Complexity** Replacing connecting rods requires **specialized tools, experience, and often a press or arbor press** to remove and install them correctly. If you re not comfortable with **engine disassembly or rod installation**, you may need to **pay a mechanic**, adding to the cost.

3. **Weight Increase** Steel rods are **heavier than cast aluminum rods**, which can **slightly reduce high-RPM power output** due to increased reciprocating mass. However, the **strength benefits usually outweigh this minor drawback** in high-performance applications.

4. **Potential for Overkill (If Not Needed)** If your engine is **naturally aspirated and lightly tuned**, these rods may be **more than necessary**. Stock rods can last **decades** in a **mildly modified, NA engine** if maintained properly. Upgrading to steel rods **only makes sense if you re pushing the engine hard** (turbo, nitrous, high boost, etc.).

- The **crankshaft journals** are in good condition (worn journals can lead to premature rod failure).

- The **pistons and bearings** are compatible (some aftermarket pistons may require rod modifications).

- The **engine block** is structurally sound (cracks or stress risers can still cause failure).

6. **Oil Flow & Lubrication Requirements** Steel rods **generate more heat** than cast rods, so **proper oil flow and cooling** are critical. If your engine lacks **adequate oil squirters or cooling**, the rods may **overheat under heavy loads**, reducing their lifespan.

7. **Potential for Misuse (If Not Paired with Supporting Upgrades)** Simply installing these rods **without upgrading the crankshaft, pistons, bearings, or oil system** can lead to **premature wear or failure** in other components. They are **not a standalone fix** they require a **balanced engine build**.

---

### **Conclusion & Recommendation**

#### **Who Should Buy These Rods?**

- You are **turbocharging** your Mazda 2.0L FS engine and expect **significant boost levels (15 psi)**.

- You plan to **run nitrous oxide** or **aggressive power levels (300 hp)**.

- Your engine has **already experienced rod-related issues** (bent rods, cracked bolts, or excessive oil consumption).

- You are **building a high-RPM, forced-induction engine** and want **maximum reliability**.

- You are **replacing worn or damaged stock rods** and want **the strongest possible upgrade**.

#### **Who Should Avoid These Rods?**

- Your engine is **naturally aspirated and lightly modified** (stock or mild tuning).

- You are **on a tight budget** and can t justify the cost without forced induction.

- You **lack the experience or tools** to install them correctly (risk of improper fitment or damage).

- You are **not upgrading the rest of the engine** (crank, pistons, bearings, oil system) to match the rod strength.

If you are **seriously modifying your Mazda 2.0L FS engine with forced induction or extreme power goals**, these **Maxpeedingrods EN24/4340 steel rods with ARP bolts are an excellent choice** they provide **the strength and reliability needed to prevent catastrophic failure**. However, **do not install them as a standalone upgrade**; pair them with:

- A **high-quality crankshaft** (balanced, ground, or upgraded).

- **Matching pistons** (forged or high-performance cast).

- **Aftermarket bearings** (e.g., Clevite, ISC, or Fel-Pro).

- **Proper oil squirters and cooling** (to prevent overheating).

- **A reliable oil system** (sump, filter, and viscosity appropriate for your power levels).

If you are **not pushing the engine hard**, consider **stock rod replacement or a budget aftermarket cast-rod option** first. But if you want **the absolute strongest, most reliable rods for a turbocharged or high-power Mazda 2.0L**, these are a **top-tier choice**.

Details:

4pcs Steel EN24 4340 Conrods Connecting Rods ARP Bolts for MAZDA 2.0L FS-DE. For MAZDA 2.0L FS-DE ENGINE, Mazda 626 1993 2002, MX-6 1997, MPV Japan 1999 2001, Capella 2003, Protege 2001 Ford Probe Tel star 1999, KIA Careens 1999 -2006, Pin Type: Floating Piston. V PRODUCT TEST AND ISO 9001 CERTIFIED, .

Advertised Horsepower Rating:200HP/piece, Top acceleration: 9000rpm, package size 28CM 21CM 10CM. Next Day Delivery.

part #: 6wy4qp prices

• $365.66-$391.98

specifications pistonrinro:

• for models: Fs
• for makes: Mazda
• brand: Maxpeedingrods
• mpn: 6wy4qp
• part type: Rod Bolt
• big end diameter: 51mm/2.008
• big end width: 21.79mm/0.858
• california prop 65 warning: California Prop 65 Warning
• ipn: 2.0l
• manufacturer warranty: 2 Years
• material: Steel
• notice: This Is Aftermarket Replcement Part
• pin type: Bronzed Bushing Floating Pin
• quantity: Set Of 4 Pieces
• rod length: 135mm/5.315
• small end diameter: 19mm/0.748
• surface finish: Extra Cost For Upgrading To Arp L19 Bolts
• universal fitment: No
• weight tolerance: Balanced To / 1 Gram In Set

seller pistonrinro:

• # reviews: 8724
• rating: 99.0%
• city: Rowland height, California

offer pistonrinro:

• best offers: True
• availability: In Stock
• quantity: 1
• started: March 19, 2026
• options: Ship-to-home
• sold: 0

shipping pistonrinro:

• cost: $0.00
• class: Standard
• transit: 4-7 Days
• carrier: FedEx
• type: Fixed
• service: FedEx Ground / FedEx Home Delivery

returns pistonrinro:

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

payments pistonrinro:

• wallet: Paypal
• other
• credit card: Visa

general pistonrinro:

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

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