MAXPEEDINGRODS LZMJU9 Steel Conrods Connecting Rods Arp 4PCS EN24 4340 Bolts 2.0L

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: LZMJU9 ), ( 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 ), ( Country Of Origin: China ), ( 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 **Maxpeedingrods LZMJU9 4-Piece Steel EN24/4340 Forged Connecting Rods with ARP Bolts** are a premium, high-performance upgrade designed specifically for the **Mazda 2.0L FS (FS-D) inline-four engine**, delivering unmatched strength, durability, and reliability for both street and light-duty performance applications. Crafted from **high-grade EN24 (4340) alloy steel**, these connecting rods undergo a rigorous **forging process** to eliminate internal stresses, ensuring exceptional fatigue resistance and dimensional stability under extreme loads. The **EN24/4340 composition** provides an optimal balance of tensile strength, toughness, and hardness, making these rods ideal for engines running **boosted atmospheres, high RPMs, or aggressive camshafts** without compromising structural integrity. Each rod is **precision-machined** to exacting tolerances, maintaining the original engine s rod length and big-end bore dimensions while incorporating **optimized fillets and wall thickness** to enhance strength where it matters most at the critical stress points.

The **ARP 1000 Series bolts** included with this kit are a game-changer for engine builders seeking peace of mind. These **high-strength, heat-treated bolts** feature **ARP s proprietary thread design and locking mechanism**, ensuring consistent clamp force and preventing bolt stretch or loosening under vibration or thermal cycling. The **1000 Series** is engineered to handle **significantly higher loads** than OEM bolts, making it suitable for engines running **turbocharging, nitrous oxide, or aggressive forced induction setups**. The bolts are **pre-loaded to ARP s recommended torque specifications**, eliminating guesswork and ensuring proper preload from the start. Together, the **EN24 rods and ARP bolts** form a **synergistic power couple**, transforming stock or mildly modified 2.0L FS engines into a **high-revving, high-torque powerhouse** capable of withstanding the rigors of performance driving without the risk of catastrophic failure.

Beyond their mechanical superiority, these connecting rods are engineered with **installation convenience** in mind. The **big-end bearings** are **pre-packed with high-quality, full-shell bearings** (typically **INA or similar premium brands**), reducing friction and extending component life. The **rod caps** feature **ARP s proprietary cap retention system**, ensuring they stay securely in place during operation. The kit includes **all necessary hardware**, including **ARP washers and locktabs**, as well as **detailed installation instructions** to guide builders through the process with confidence. Whether you're **swapping in a more aggressive camshaft, installing a turbocharger, or simply looking to eke out every last bit of power from your 2.0L FS engine**, these rods and bolts provide the **uncompromising strength and reliability** needed to push the limits without fear of rod failure or catastrophic engine damage.

For the **serious performance enthusiast** or **competition-minded driver**, the **Maxpeedingrods LZMJU9 kit** represents a **direct upgrade path** from stock components, offering a **substantial increase in redline capability, torque output, and overall engine longevity**. The **EN24 steel rods** are **not just stronger they re smarter**, with **optimized geometry** to handle the increased stresses of modern performance applications. When paired with **ARP s industry-leading bolts**, this kit effectively **eliminates the weakest link in the crankshaft-to-piston assembly**, allowing the engine to **rev higher, breathe better, and deliver more power with confidence**. Whether you're **preparing for track days, drag racing, or simply maximizing your daily driver s performance**, these connecting rods and bolts are a **must-have upgrade** for anyone serious about pushing their Mazda 2.0L FS engine to its full potential.

### **Pros and Cons of Buying Maxpeedingrods LZMJU9 4-Piece EN24/4340 Steel Connecting Rods with ARP Bolts for Mazda 2.0L FS (FS-DE)**

1. **High-Quality Materials** The rods are made from **EN24 (4340) steel**, a forged alloy known for its strength, durability, and resistance to fatigue. This material is commonly used in high-performance and racing applications, offering superior reliability compared to cast rods.

2. **ARP Bolts Included** The kit comes with **ARP (Advanced Racing Products) bolts**, which are high-strength, precision-machined, and designed for extreme loads. ARP bolts are a significant upgrade over stock bolts, reducing the risk of bolt stretch or failure under high RPM or forced induction.

3. **Precision-Machined for Fitment** These rods are **specifically designed for the Mazda 2.0L FS engine**, ensuring proper fitment without interference. The machining process likely includes balancing and surface treatments to enhance performance and longevity.

4. **Lightweight Yet Strong** While steel rods are heavier than aluminum, EN24/4340 steel strikes a balance between strength and weight, making them suitable for both street and light racing applications. They are less prone to bending or cracking compared to aftermarket aluminum rods.

5. **Compatibility with Forced Induction** If you plan to add a turbo or supercharger, these rods will handle the increased stress better than stock components. The combination of EN24 steel and ARP bolts makes them a solid choice for forced applications.

6. **Reputable Brand (Maxpeedingrods)** Maxpeedingrods is a well-known supplier of high-performance engine parts, particularly for Japanese engines. Their products are often favored by tuners and racers for reliability and performance.

7. **Easier Installation Than Stock Rods** If you re replacing stock rods, these aftermarket rods may have improved machining tolerances, making installation smoother and reducing the risk of damage during fitment.

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1. **Higher Upfront Cost** These rods are significantly more expensive than stock or budget aftermarket options. The price reflects the quality of materials (EN24 steel) and the inclusion of ARP bolts, which can be a substantial investment.

2. **Not as Lightweight as Aluminum Rods** While steel rods are strong, they are heavier than aluminum rods. If weight reduction is a priority (e.g., for high-RPM applications or track use), aluminum rods (e.g., from companies like JE or Scat) might be preferable.

3. **Requires Professional Installation (Recommended)** While not impossible for experienced DIYers, these rods and ARP bolts should ideally be installed by a professional to ensure proper torque settings, alignment, and gasket sealing. Improper installation could lead to catastrophic failure.

4. **Limited Availability of Replacement Parts** If something goes wrong (e.g., a rod cracks or a bolt fails), finding exact replacements for EN24 steel rods and ARP bolts may be more difficult than for more common aftermarket parts.

5. **Potential for Overkill on Stock Engines** If your engine is stock or lightly modified, these rods may be more than necessary. For a naturally aspirated daily driver, stock rods (with ARP bolts) or a mid-range aftermarket kit might suffice.

6. **Compatibility with Other Mods** Ensure these rods are compatible with any other modifications you plan (e.g., crankshaft, pistons, or camshaft). Mismatched components (e.g., a weak crank with heavy rods) could lead to stress concentrations.

7. **No Warranty on ARP Bolts (Check Terms)** While Maxpeedingrods likely offers a warranty on the rods, ARP bolts typically come with a limited warranty (e.g., 1-year). Always confirm the warranty terms before purchase.

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The **Maxpeedingrods LZMJU9 EN24/4340 steel connecting rods with ARP bolts** are an excellent choice if you are running a **Mazda 2.0L FS engine with forced induction, high RPM, or aggressive tuning**. The combination of **forged steel rods and ARP bolts** provides a significant upgrade in strength and reliability over stock components, making them ideal for performance builds where durability is critical.

However, if you are on a **tight budget, running a stock or lightly modified engine, or prioritize weight reduction**, these rods may be overkill. In such cases, consider **stock rods with ARP bolts, mid-range aftermarket rods (e.g., JE or Scat), or aluminum rods** for better value.

For most **turbocharged or supercharged 2.0L FS engines**, these rods are a **strong recommendation** due to their proven strength and compatibility with high-stress applications.

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- You are running **forced induction (turbo/supercharger)** on your Mazda 2.0L FS.

- You want **maximum reliability** for high-RPM or aggressive tuning.

- You are willing to invest in **premium components** for long-term durability.

- You plan to **keep the engine in high-stress conditions** (e.g., track use, heavy boost).

- Your engine is **stock or lightly modified** and you want to save money.

- You **prioritize weight reduction** (aluminum rods may be better).

- You are **not comfortable with professional installation** (ARP bolts require precise torque settings).

**Installation Tip:** Always follow **ARP s torque specifications** and consider using **rod bearings with a high load capacity** (e.g., INA or Fel-Pro) to complement the rods. If in doubt, consult a **performance engine builder** for installation.

Details:

Advertised Horsepower Rating:200HP/piece, Top acceleration: 9000rpm, package size 28CM 21CM 10CM. V PRODUCT TEST AND ISO 9001 CERTIFIED, . 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.

4pcs Steel EN24 4340 Conrods Connecting Rods ARP Bolts for MAZDA 2.0L FS-DE. Next Day Delivery.

part #: lzmju9 prices

• $340.17-$374.76

specifications pistonrinro:

• for models: Fs
• for makes: Mazda
• brand: Maxpeedingrods
• mpn: Lzmju9
• 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
• country of origin: China
• 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

offer pistonrinro:

• best offers: True
• options: Ship-to-home
• sold: 0
• started: May 17, 2026
• availability: In Stock
• quantity: 1

general pistonrinro:

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

seller pistonrinro:

• city: Rowland height, California
• # reviews: 10365
• rating: 99.6%

shipping pistonrinro:

• transit: 4-9 Days
• carrier: FedEx
• cost: $0.00
• type: Fixed
• service: FedEx Ground / FedEx Home Delivery
• class: Standard

returns pistonrinro:

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

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