Knock Control & Protection

delivering unmatched stability for high-lift and high-RPM applications

8 Universal A/D I/O pins

The screen can display all real-time information reading from the ECU such as RPM

This keeps fuel temperatures lower and prevents cavitation

BMW M40 / M42 / M43 / M44 Connecting Rod Bolts by ARP B58 BMW Knock Control & ProtectionBolster your BMW M40 M42 M43 M44 rods with ARP Connecting Rod Boltsthe 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