4100-4900 RPM Odd Series Module Kit

The MSD IGNITION 4100-4900 RPM Odd Series Module Kit (MPN 87441) is a precision ignition control module designed for high-performance engine tuning and race applications. This module kit enables fine-tuned RPM management across a critical mid-to-upper engine speed range, making it essential for builders and tuners who demand exact fuel and spark timing control. The odd-series configuration supports specialized ignition mapping strategies used in competition vehicles and custom performance engines where stock ECU limitations restrict optimization potential.

This module kit operates within a 4100 to 4900 RPM band using 200 RPM incremental steps, allowing technicians to program ignition curves with granular precision across this performance envelope. The odd-series designation indicates a specific chip architecture optimized for unconventional firing orders or dual-spark configurations common in modified engines. At just 0.14 lbs with compact dimensions (6.1 x 1.05 x 7.85 inches), the module integrates seamlessly into existing MSD ignition systems without adding significant weight or bulk to engine bay installations. This precision-engineered component delivers repeatable timing control and supports advanced tuning strategies that stock systems cannot achieve.

Engine builders, performance tuners, and race teams benefit most from the 4100-4900 RPM Odd Series Module Kit when optimizing mid-range torque delivery and peak power output in modified or turbocharged applications. This module is ideal for engines running aftermarket fuel injection, custom camshaft profiles, or non-standard valve timing where traditional ignition mapping proves inadequate. Installation requires compatibility with existing MSD IGNITION systems and professional tuning expertise to unlock full potential. For street performance builds or competition engines targeting the critical 4100-4900 RPM range, this kit represents a focused upgrade path for serious automotive enthusiasts seeking precision control over ignition events.