MAXPEEDINGRODS U4W31Q Titanized Forged Connecting Rod Arp 4340 Bolts 1UR 3UR 4.6 5.7

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: U4W31Q ), ( Part Type: Rod Bolt ), ( Big End Diameter: 56mm ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Center To Center Length: 147.5mm ), ( Fitment Type: Direct Replacement ), ( Material: Titanizing Aircraft Chrome Moly Quality Steel ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part ), ( Pin Type: Bronzed Bushing Floating Pin ), ( Quantity: Set Of 8 Pieces ), ( Small End Diameter: 22mm ), ( Surface Finish: Extra Cost For Upgrading To Arp L19 Bolts ), ( Weight Tolerance: Balanced To / 1 Gram In Set ), ( Country Of Origin: China )

Review MAXPEEDINGRODS Titanized Forged 4340 Connecting Rod Arp Bolts Toyota Lexus 1ur 3ur 4.6 5.7

The **Maxpeedingrods U4W31Q Titanium Forged 4340 ARP Bolt Set** represents the pinnacle of high-performance engine reinforcement for Toyota and Lexus V8 applications, specifically engineered for the legendary **1UR and 3UR 4.6L and 5.7L naturally aspirated and supercharged engines**. These bolts are not merely upgrades they are meticulously crafted components designed to withstand the extreme stresses of aggressive driving, forced induction, or high-revving applications while maintaining the structural integrity of your engine. Forged from **AISI 4340 alloy steel**, a material renowned for its exceptional strength-to-weight ratio and fatigue resistance, these bolts are then subjected to a **titanium nitride (TiN) coating process**, which enhances their durability, reduces friction, and provides a sleek, corrosion-resistant finish that stands up to the harshest conditions. The **ARP (Advanced Retaining Products) grade** ensures these bolts meet or exceed OEM specifications, offering a **100% thread engagement** with the engine block and crankshaft, eliminating the risk of loosening or failure under extreme loads. Whether you're pushing a naturally aspirated 4.6L to its limits, running a supercharged 5.7L with boost pressures, or chasing high RPMs in a tuned application, these bolts deliver the reliability and precision required to keep your engine running at peak performance. The **U4W31Q designation** confirms they are specifically matched to the **1UR and 3UR engine families**, ensuring a perfect fit for the **crankshaft main caps and rod bearings**, where strength and precision are critical. Built to endure the most demanding scenarios, these bolts are a must-have for enthusiasts and racers who demand nothing less than the best in engine reinforcement.

**Pros and Cons of Buying Maxpeedingrods U4W31Q Titanium Forged 4340 Connecting Rod ARP Bolts for Toyota/Lexus 1UR/3UR 4.6L/5.7L Engines**

1. **Superior Strength and Durability** These bolts are forged from 4340 steel and titanium-coated, offering significantly higher tensile strength and fatigue resistance compared to stock or aftermarket OEM bolts. The U4W31Q variant is designed to handle extreme stress, making them ideal for high-performance applications, forced induction, or aggressive driving.

2. **Precision Machining and Fit** Maxpeedingrods specializes in custom-fit hardware, ensuring these bolts are precisely machined to match the 1UR/3UR engine s specifications. This reduces the risk of clearance issues or improper seating, which can lead to leaks or damage.

3. **ARP-Quality Retaining Power** The bolts incorporate ARP s proprietary thread design and torque specifications, which provide superior clamping force and prevent loosening under heavy loads. This is critical for engines under boost or high RPMs.

4. **Compatibility with High-Performance Mods** If you re running a turbocharged, supercharged, or nitrous setup, these bolts are engineered to handle the increased stress without failing. They re also suitable for engines with modified crankshafts or pistons that generate higher loads.

5. **Long-Term Reliability** Titanium coating reduces friction and corrosion, extending the bolts lifespan in harsh environments (e.g., high humidity, salt exposure, or oil contamination). This makes them a better long-term investment than standard bolts.

6. **OEM Replacement with Upgrades** While they replace stock bolts, they offer a significant performance upgrade without requiring major engine modifications. This makes them a practical choice for those who want reliability without a full rebuild.

7. **Warranty and Support** Maxpeedingrods provides a warranty on their products, and their customer service is known for addressing issues promptly. This adds peace of mind compared to generic or no-name bolts.

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1. **High Cost** These bolts are significantly more expensive than OEM or generic aftermarket alternatives. For a set, the price can be 3 5 times higher than stock bolts, which may be a barrier for budget-conscious builders.

2. **Installation Complexity** While not overly difficult, installing ARP-style bolts requires precise torque specifications (typically 100 120 ft-lbs for these rods) and may necessitate a torque wrench and proper technique. Improper installation can lead to stripped threads or bolt failure.

3. **Limited Availability** These are specialty bolts, so they may not be stocked at local auto parts stores. You ll likely need to order them online, which could involve shipping delays.

4. **Not a "Drop-In" Replacement for All Builds** While designed for the 1UR/3UR, they re intended for high-performance applications. If your engine is stock or lightly modified, the extra strength may be overkill, making the cost unjustified.

5. **Potential for Over-Tightening Risks** Some builders may be tempted to exceed the recommended torque due to the bolts strength, risking warped rod caps or crankshaft damage. Strict adherence to specs is critical.

6. **Compatibility with Non-Stock Rods** If you re using aftermarket rods (e.g., Eagle, JE, or custom rods), ensure they re compatible with these bolts. Some aftermarket rods may require different bolt patterns or lengths.

7. **Learning Curve for First-Time Users** If you ve never worked with ARP-style hardware before, the process of installing and torquing these bolts may feel unfamiliar. Research or professional installation is advisable for first-timers.

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Maxpeedingrods U4W31Q titanium-forged 4340 connecting rod ARP bolts are one of the best aftermarket options for the 1UR/3UR engines, especially for high-performance applications. Their unmatched strength, precision engineering, and reliability make them a worthwhile investment for builders pushing their engines beyond stock limits. However, the high cost and specialized installation requirements mean they re best suited for serious enthusiasts or professional shops rather than casual or budget-conscious projects.

If your primary goal is **maximum reliability under extreme stress** (e.g., forced induction, nitrous, or aggressive daily driving), these bolts are an excellent choice. If you re working with a stock or lightly modified engine and prioritize cost efficiency, you might consider higher-quality OEM replacements (e.g., Toyota/Lexus performance bolts) or other mid-range aftermarket options like those from **Eagle, JE, or ARP s standard line**.

For most **high-performance 1UR/3UR builds**, the trade-off in cost and effort is justified by the peace of mind and longevity these bolts provide.

- You re running a turbocharged, supercharged, or nitrous setup.

- Your engine sees aggressive daily driving or track use.

- You ve already invested in high-performance components (e.g., forged internals, custom rods) and want the best possible hardware.

- You re comfortable with precise installation and torque specifications.

- Your build is stock or lightly modified, and you re on a tighter budget.

- You prefer a simpler, lower-cost solution (e.g., Toyota/Lexus performance bolts or ARP s standard rod bolts).

- You re not experienced with ARP-style hardware and want to avoid potential installation mistakes.

For the 1UR/3UR platform, these bolts are among the best available, but weigh the long-term benefits against your specific build goals and budget. If performance and reliability are your top priorities, they re a strong recommendation.

Details:

The density of titanium is significantly lower than that steel, while maintaining considerable strength, which means it lighter but the strength very similar. Guaranteed Fitment Always the correct part. Best Costumer Service. All messages.

FOR Toyota/Lexus 1UR/3UR 4.6 V8 /5.7 engine. Specifications. Compatible for: 2007 2017 For Lexus LS 460 L, 2005 2011 GS 460, 2008 Present LX 570, 2010 present GX Toyota Tundra, 2007 Sequoia, Land Cruiser 200 Series US and Middle East markets only, 2012 China, Australia, 2009 - 2013 Crown Majesty, 2009 2013 2014, Pin Type: Floating Piston. Titanizing can further improve the bending strength of product: 2.

H-Beam design reduces weight without compromising strength. Each rod is magnetic particle tested to ensure free of flaws. Factory Warranty. Suspension Masters US.

9.High precision CNC machined,Precision rod cap alignment dowels. Advertised Horsepower Rating:200HP/piece, Top acceleration: 9000rpm, package size 28CM 21CM 14CM.

part #: u4w31q prices

• $539.99-$555.99

specifications pistonrinro:

• for makes: Toyota, Lexus
• brand: Maxpeedingrods
• mpn: U4w31q
• part type: Rod Bolt
• big end diameter: 56mm
• california prop 65 warning: California Prop 65 Warning
• center to center length: 147.5mm
• fitment type: Direct Replacement
• material: Titanizing Aircraft Chrome Moly Quality Steel
• note: No Instruction Included
• notice: This Is Aftermarket Replcement Part
• pin type: Bronzed Bushing Floating Pin
• quantity: Set Of 8 Pieces
• small end diameter: 22mm
• surface finish: Extra Cost For Upgrading To Arp L19 Bolts
• weight tolerance: Balanced To / 1 Gram In Set
• country of origin: China

offer pistonrinro:

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

shipping pistonrinro:

• transit: 4-7 Days
• class: Standard
• cost: $0.00
• carrier: UPS
• service: UPS Ground
• type: Fixed

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general pistonrinro:

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

seller pistonrinro:

• rating: 99.6%
• city: Rowland height, California
• # reviews: 16220

returns pistonrinro:

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

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