MSD ASY17903 RPM Rev Limiter Module Chip 8500 RPM

The MSD ASY17903 is a single plug-in 8500 RPM rev limiter module chip designed for use with MSD ignition boxes. Swapping RPM modules is one of the quickest and easiest ways to change the rev limit on your MSD ignition system — no wiring or programming required.

Key Features:

• 8500 RPM limit — purpose-built for IMCA Modified classes running the GM 604 sealed crate engine
• Plug-in installation — simply insert the module into the designated RPM module socket on your MSD ignition box
• Single module — sold individually as a replacement or spare chip
• Manufacturer Part Number: ASY17903
• Compatible with MSD ignition controls that accept plug-in RPM modules (6AL, 7AL, and similar units)

Whether you're setting a class-legal rev limit for circle track competition or protecting your engine from over-rev, the MSD ASY17903 delivers reliable, repeatable RPM control. It is a must-have accessory for IMCA Modified racers running the 604 crate engine who need to comply with series RPM regulations.