BMW M40 / M42 / M43 / M44 Connecting Rod Bolts by ARP

Bolster your BMW M40 / M42 / M43 / M44 rods with ARP Connecting Rod Bolts—the ultimate choice for strength, reliability, and high-performance durability. Crafted in the USA by Automotive Racing Products (ARP), these bolts are engineered to surpass OEM rod bolts, making them essential for demanding applications.

Perfect for rebuilds or performance engine preparation, ARP rod bolts deliver confidence under extreme conditions. Manufactured from premium materials and precision-engineered, they resist stretch and protect your engine by securely fastening the connecting rods to the crankshaft, even at high RPMs and intense loads.

Key Benefits:

• Exceptional Strength: Engineered to handle higher stress levels, reducing the risk of failure in high-performance builds.
• Unmatched Durability: Superior fatigue resistance ensures reliability over time.
• Perfect Fit: Specifically designed for the BMW M40, M42, M43, and M44 engine, ensuring a precise and seamless installation.

Each kit includes precision bolts and ARP’s trusted assembly lubricant for accurate installation. Be sure to follow ARP’s torque specifications for optimal performance.

Proven by professional builders and enthusiasts alike, ARP Connecting Rod Bolts are a critical upgrade for anyone pushing the limits of their BMW M4X engine. Whether you're enhancing your daily driver, tuning for performance, or preparing for the track, these bolts deliver the strength and reliability your BMW demands.

44 mm Installation Instructions:

1. Ensure there is an adequate chamfer around the bolt hole on the connecting rod bolt hole on the connecting rod cap to clear the radius under the head of the bolt
2. Use ARP Ultra-Torque Fastener Assembly Lubricant to lubricate the threads of the bolt and the under head of the bolt. Then install the bolts and tighten them them hand tight. 
3. ARP recommends using the Stretch Method when tightening rod bolts. Following the instructions for using a stretch gauge, stretch the bolts to 0.0070 - 0.0075. 
4. If you do not have a stretch gauge, torque the bolts to 40 ft-lbs using ARP Ultra-Torque Fastener Assembly Lubricant.
5. The connecting rods should always be re-sized after new rod bolts are installed. 
6. A log should be kept on the original non-torqued length of each bolt. Bolts that have any permanent deformation or have increased in non-torqued length by more than 0.001 inch should be replaced. 

53 mm Installation Instructions:

1. Ensure there is an adequate chamfer around the bolt hole on the connecting rod bolt hole on the connecting rod cap to clear the radius under the head of the bolt
2. Use ARP Ultra-Torque Fastener Assembly Lubricant to lubricate the threads of the bolt and the under head of the bolt. Then install the bolts and tighten them them hand tight. 
3. ARP recommends using the Stretch Method when tightening rod bolts. Following the instructions for using a stretch gauge, stretch the bolts to 0.0080 - 0.0085. 
4. If you do not have a stretch gauge, torque the bolts to 36 ft-lbs using ARP Ultra-Torque Fastener Assembly Lubricant.
5. The connecting rods should always be re-sized after new rod bolts are installed. 
6. A log should be kept on the original non-torqued length of each bolt. Bolts that have any permanent deformation or have increased in non-torqued length by more than 0.001 inch should be replaced. 

BMW M40 Applications:

3 Series

1987-1994     E30     316i / 318i
1991-1993     E36     316i / 318i / 318is

5 Series

1988-1992     E34     518i

BMW M42 Applications:

3 Series

1989-1991     E30     318i / 318is
1992-1996     E36     318i / 318is

BMW M43 Applications:

3 Series

1993-1998     E36     316i / 318i / 318is
1998-2001     E46     316i / 318i

5 Series

1994-1996     E34     518i
1995-2000     E39     518i

Z Series

1995-1999     E36/7     Z3 1.8i
1999-2000     E36/7     Z3 1.9i

BMW M44 Applications:

3 Series

1996-1999     E36     318i / 318is

Z Series

1996-1999     E36/7     Z3 1.9i