Jet Performance 29422S | Engine Control Module (ECM) PROM

Jet Performance Chips offer the most horsepower available for your 1981-1995 GM car, truck or SUV. Add up to 23 horsepower instantly with simple, plug-in installation. Only Jet Performance Chips provide exclusive, full range Dynamic Spectrum Tuning of the air and fuel ratio, ignition advance, transmission and various other parameters. Each program is track and dyno tested to ensure the most possible horsepower and drivability from each application.

• Jet Performance Upgrade Stage 2 Computer Chip
• Provides Exclusive Full Range DST Programming
• Jet Performance Upgrade Stage 2 Computer Chip; Requires Use Of 91 Octane Fuel/180 Degree Thermostat/Free Flow Exhaust;
• Each Program Is Track And Dyno Tested
• Offers The Most Horsepower Available

• 1994-1994 GMC Safari
• Requires Use Of 91 Octane Fuel/180 Degree Thermostat/Free Flow Exhaust;CARB E.O. D-234-4
• 1994-1994 Chevrolet Astro
• Requires Use Of 91 Octane Fuel/180 Degree Thermostat/Free Flow Exhaust;CARB E.O. D-234-4 ECM Located Behind Passenger Side Kick Panel