1994-1998 12 Valve Cummins 5000 RPM Governor Spring Kit19941998 12 Valve Cummins 5,000 RPM Governor Spring Kit Unlock higher RPM potential and improved performance from your 12 valve Cummins with this 5,000 RPM Governor Spring Kit, designed specifically for 19941998 5. 9L Cummins engines. This kit allows your engine to rev higher than the factory limit, making it ideal for performance builds, competition use, and drivers looking for stronger top end power. Key Features: Raises engine RPM limit up to 5,000