TOBIN ARP PM-3910A Sunnen Drive Bar Piston Pin Connecting 1/2 Rod Pm Boring

( Brand: Tobin Arp ), ( Manufacturer Part Number: PM-3910A ), ( Country Of Origin: United States )

Review TOBIN ARP Sunnen 1/2 Inch Drive Bar Piston Pin And Connecting Rod Pm Boring Machine

Introducing the Tobin ARP PM-3910A Sunnen 1/2 Drive Bar for use with piston pins and connecting rods during boring processes. This high-performance tool is a must-have for engine builders and racing enthusiasts seeking precision and durability in their engine rebuilds.

The PM-3910A is a 1/2 drive bar designed to be used in conjunction with the Sunnen Boring Bar System. The bar is made from top-grade, heat-treated steel, ensuring it can withstand the demanding conditions of engine boring without bending or breaking. Its strong and rigid construction provides the necessary torque to effectively seat piston pins and connecting rods during the boring process.

One of the standout features of the PM-3910A is its compatibility with the Sunnen System. This system allows for precise alignment of the bore, ensuring that the piston pin and connecting rod are properly seated in the cylinder. The result is a more accurate bore, which translates to better engine performance and increased longevity.

The PM-3910A also comes with ARP's trademark quality assurance. Every bar is meticulously inspected and tested to ensure it meets the highest standards of precision and strength. This attention to detail ensures that you, the user, can trust that you're getting a tool that will get the job done right the first time.

In summary, the Tobin ARP PM-3910A Sunnen 1/2 Drive Bar is an essential tool for any engine rebuild project. Its robust construction, compatibility with the Sunnen System, and ARP's commitment to quality make it an invaluable addition to your engine building toolkit. Whether you're a seasoned professional or a hobbyist, the PM-3910A will help you achieve the level of precision and performance you're looking for in your engine build.

The Tobin ARP PM-3910A Sunnen 1/2 drive bar piston pin connecting rod kit with PM boring includes several upgraded components designed to enhance the performance and durability of your engine. Here are some pros and cons to consider before making a purchase:

1. High-quality materials: This kit is made from top-notch materials, including ARP's proprietary 2000-series connecting rods, Sunnen's borings, and forged piston pins.

2. Improved engine performance: Upgrading your connecting rods and piston pins can lead to increased power output, improved engine response, and reduced vibration.

3. Enhanced reliability: The components in this kit are designed to last longer than OEM parts, reducing the likelihood of engine failure and the need for frequent repairs.

4. Precision machining: Sunnen's boring process ensures that the cylinder bores are perfectly round and true, which can lead to better ring sealing and reduced oil consumption.

1. Cost: This kit can be quite expensive compared to OEM parts or even aftermarket alternatives.

2. Installation complexity: Installing this kit requires significant engine disassembly, which can be time-consuming and labor-intensive.

3. Potential for damage: When working on an engine, there is always a risk of damaging other components or causing unintended consequences.

The Tobin ARP PM-3910A Sunnen 1/2 drive bar piston pin connecting rod kit with PM boring is an excellent option for those looking to upgrade their engine components with high-quality, durable parts. While the cost and installation complexity may be discouraging, the potential benefits in terms of improved performance, reliability, and engine life make it a worthwhile investment for serious enthusiasts or high-performance applications.

If you are considering purchasing this kit, make sure to do your research and consult with a knowledgeable mechanic or engine builder to ensure that it is the right fit for your specific application. Additionally, consider setting aside sufficient time and budget for the installation process, as it can be quite involved. Ultimately, if you are looking for a top-tier engine upgrade and are willing to invest in the cost and time required, this kit is an excellent choice.

Details:

USED TOBIN ARP PM-3910A SUNNEN PM-2860A 1/2 BORING BAR DRIVE CONNECTOR IN VERY GOOD CONDITION.

part #: pm3910a prices

• $115.00-$415.00

specifications shopequipm:

• brand: Tobin Arp
• mpn: Pm-3910a
• country of origin: United States

payments shopequipm:

• wallet: Google-pay
• other
• credit card: Diners-club

returns shopequipm:

• policy: No Returns

general shopequipm:

• Automotive Tools Supplies > Shop Equipment Supplies > Other Shop Equipment
• condition: Used

seller shopequipm:

• city: New Hampshire
• rating: 100.0%
• # reviews: 1347

offer shopequipm:

• started: February 27, 2026
• sold: 0
• quantity: 1
• options: Ship-to-home
• availability: In Stock

shipping shopequipm:

• carrier: USPS
• class: Standard
• service: USPS Ground Advantage
• cost: $15.00
• transit: 4-8 Days
• type: Fixed

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