MAXPEEDINGRODS BU4ZL9 Racing Connecting Rod Kent Crossflow Kit Capri Ecj 4340 Steel

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: BU4ZL9 ), ( Big End Diameter: 52.91mm ), ( Big End Width: 26.8mm ), ( Bundle Listing: Yes ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Center To Center Length: 125.17mm ), ( Country Of Origin: China ), ( Fitment Type: Performance/custom ), ( Manufacturer Warranty: 2 Years ), ( Material: Steel ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part ), ( Pin Type: Bronzed Bushing Floating Pin ), ( Quantity: 4 Pieces Of H-beam Connecting Rods ), ( Small End Diameter: 20.62mm ), ( Small End Width: 22.35mm ), ( Type: Connecting Rod Set ), ( Universal Fitment: No ), ( Weight Tolerance: Balanced To / 1 Gram In Set )

Review MAXPEEDINGRODS Racing Connecting Rod Kit Ford Kent Crossflow Capri Ecj 4340 Steel fits 1968–1974

The **Maxpeedingrods BU4ZL9 Racing Connecting Rod Kit** is a meticulously engineered, high-performance upgrade designed exclusively for the iconic **Ford Kent Crossflow Capri ECJ (1968 1974)**, featuring the legendary **4.3L Cleveland V8 engine**. Crafted from **4340 steel**, this kit represents a fusion of precision forging and advanced metallurgy, ensuring unmatched strength, durability, and reliability under extreme racing conditions. Each rod in this kit is dynamically balanced and machined to exacting tolerances, eliminating vibration and minimizing internal stress critical factors for maintaining peak performance and longevity in high-revving applications. The **4340 steel** composition delivers superior fatigue resistance and toughness, making these rods ideal for both street tuning and competitive motorsport, where reliability and power output are paramount. The kit includes **pre-drilled and tapped rod caps** for easy installation, along with **high-quality bolts** and **washers** to secure the assembly, ensuring a secure and repeatable fit every time. Whether you're pushing the limits on the track or fine-tuning your Capri for drag racing, this connecting rod kit provides the structural integrity and performance edge required to harness the full potential of your Cleveland engine. Built to withstand the rigors of forced induction, high RPM, and aggressive power modifications, the Maxpeedingrods BU4ZL9 kit is a must-have for enthusiasts seeking a balance of strength, precision, and performance in their classic Ford V8.

### **Pros and Cons of the Maxpeedingrods BU4ZL9 Racing Connecting Rod Kit for the Ford Kent Crossflow Capri ECJ (1968 1974, 4340 Steel)**

1. **High-Strength Materials** The rods are made from **4340 steel**, a premium alloy known for its strength, durability, and resistance to fatigue. This material is commonly used in high-performance and racing applications, offering superior load-bearing capacity compared to stock rods.

2. **Precision Machining** Maxpeedingrods is a reputable manufacturer that specializes in aftermarket performance parts. Their rods are likely **precisely balanced and machined** to tight tolerances, reducing vibration and improving engine longevity under high stress.

3. **Increased Reliability** Stock connecting rods on older Ford Kent engines (especially in high-performance or heavily modified applications) are prone to failure under excessive loads. Upgrading to these rods can **significantly reduce the risk of catastrophic rod failure**, which is a major concern in forced-induction or high-RPM applications.

4. **Compatibility with Modifications** If you plan to run **turbocharging, nitrous, or aggressive camshafts**, these rods will better handle the increased stress. They are designed to work with **modern performance builds**, including high-flow cylinder heads and stronger crankshafts.

5. **Warranty and Support** Maxpeedingrods offers **warranty coverage** on their products, which provides peace of mind in case of manufacturing defects. Their customer service and technical support are generally well-regarded in the performance community.

6. **Potential for Increased Power** By upgrading to stronger rods, you can **push the engine harder without fear of failure**, allowing for more aggressive tuning and power gains. This is particularly useful if you re running **big-bore kits, high-lift cams, or forced induction**.

7. **Better Weight Distribution** Some aftermarket rods are **lightweight yet strong**, improving reciprocating mass balance, which can reduce engine harmonics and improve smoothness at high RPM.

---

1. **Cost** High-quality aftermarket connecting rods are **significantly more expensive** than stock rods. Depending on the exact kit (including bolts, gaskets, and installation hardware), the price can range from **$300 $600 **, which is a substantial investment for a single component.

2. **Installation Complexity** Replacing connecting rods is a **labor-intensive job** that requires **specialized tools** (rod jig, torque wrench, proper alignment tools) and **expertise**. If not installed correctly, it can lead to **misalignment, binding, or premature wear**. Many owners opt to have this work done by a **reputable machine shop or performance shop**, adding to the cost.

3. **Potential for Overkill (If Not Needed)** If your engine is **stock or lightly modified** (stock cam, mild carburetion, no forced induction), these rods may be **more than necessary**. Stock rods can last indefinitely in a **well-maintained, naturally aspirated engine** with proper oil changes and inspections.

4. **Compatibility with Stock Components** Some aftermarket rods may require **additional modifications**, such as **crankshaft upgrades, main bearings, or oil pump adjustments**, to ensure proper clearance and lubrication. If these supporting components are not upgraded, the rods may not perform optimally.

5. **Risk of Improper Fitment** While Maxpeedingrods rods are designed for the **Kent Crossflow engine**, there is a **small chance of fitment issues** if the engine has been heavily modified (e.g., big bore, custom crank, or aggressive decking). Always verify **clearances and bolt patterns** before purchasing.

6. **Maintenance Requirements** Stronger rods do not eliminate the need for **proper maintenance**. If oil changes are neglected, or if the engine runs **low on oil**, even the best rods can fail due to **metal fatigue or lack of lubrication**.

---

The **Maxpeedingrods BU4ZL9 4340 steel connecting rod kit** is a **high-quality upgrade** for the **Ford Kent Crossflow engine**, particularly if you are running **high-performance modifications, forced induction, or aggressive tuning**. The **4340 steel construction** provides **superior strength and reliability**, making it an excellent choice for **racing, drag racing, or serious street performance builds**.

However, if your engine is **stock or lightly modified**, these rods may be **overkill and unnecessary**, leading to **unjustified expense without proportional benefits**. The **installation difficulty and cost** also mean that this upgrade is best suited for **serious builders** who are committed to **maximizing engine durability and power**.

- You are **running forced induction (turbo/nitrous)**.

- You are **aggressively modifying the engine** (big bore, high-lift cam, strong crank).

- You are **building a race engine** where reliability is critical.

- Your **stock rods are worn or have failed in the past**.

- Your engine is **stock or mildly modified** (stock cam, carburetion, no forced induction).

- You are **on a tight budget** and cannot justify the cost.

- You are **not comfortable with the installation process** (consider a professional shop).

- If you want **stronger rods but at a lower cost**, consider **used or aftermarket rods from other brands** (e.g., **JE, Scat, or ARP**).

- If your engine is **stock or near-stock**, focus on **maintenance and oil quality** before upgrading rods.

- If you are **big-boring the engine**, ensure the **crankshaft and main bearings** are also upgraded to match the rod strength.

**Final Verdict:** For **high-performance or racing applications**, the **Maxpeedingrods 4340 steel rods are an excellent investment**. For **stock or lightly modified engines**, they are **not essential** and may not provide enough benefit to justify the cost. Always **consult with a performance engine builder** before making the upgrade to ensure it aligns with your engine s needs.

Details:

Center to length : 125.17mm, Big end diameter: 52.91mm, Small 20.62mm, width : 26.80mm, 22.35mm. Fitment: For Ford Capri ECJ 1968-1974 Coupe, Corina 1962-1972 Estate, Saloon, Escort AFH, ATH 1968-1976 Turner ADH, AF Fiesta GFBT 1976-1983 Hatchback. For Ford Kent Crossflow 4.928.

T V PRODUCT TEST AND ISO 9001 CERTIFIED, Piston Bolt Hole: -4/1000mm, Power: 600 800HP, Strength of the fastening PSI: 200,000 - 230,000 psi, Torque: 48ft 65 NM, Top speed: 7000-9000 rpm, Quantity: 4 Pieces a set, Bolts: Including 3/8 ARP 2000 bolts Note: Extra cost for upgrading to L19 bolts, Material: Forged 4340 aircraft chrome Molly quality steel racing, Weight Tolerance: Balanced /- 1 gram in warranty: 2 Years warranty any manufacturing defect.

part #: bu4zl9 prices

• $369.59-$388.79

specifications pistonrinro:

• for makes: Ford
• for years: 1968-1974
• brand: Maxpeedingrods
• mpn: Bu4zl9
• big end diameter: 52.91mm
• big end width: 26.8mm
• bundle listing: Yes
• california prop 65 warning: California Prop 65 Warning
• center to center length: 125.17mm
• country of origin: China
• fitment type: Performance/custom
• manufacturer warranty: 2 Years
• material: Steel
• note: No Instruction Included
• notice: This Is Aftermarket Replcement Part
• pin type: Bronzed Bushing Floating Pin
• quantity: 4 Pieces Of H-beam Connecting Rods
• small end diameter: 20.62mm
• small end width: 22.35mm
• type: Connecting Rod Set
• universal fitment: No
• weight tolerance: Balanced To / 1 Gram In Set

shipping pistonrinro:

• transit: 3-5 Days
• cost: $0.00
• class: Standard
• type: Fixed
• service: FedEx Ground / FedEx Home Delivery
• carrier: FedEx

payments pistonrinro:

• credit card: Discover
• other
• wallet: Apple-pay

returns pistonrinro:

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

offer pistonrinro:

• options: Ship-to-home
• started: May 16, 2026
• best offers: True
• quantity: 1
• sold: 0
• availability: In Stock

seller pistonrinro:

• rating: 99.9%
• city: Rowland height, California
• # reviews: 2811

general pistonrinro:

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

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