Description: These Street Runner Power Chips are replacements for your GM computers stock PROM or memory chip which holds the factory settings that control your fuel flow and spark advance. These Power Chips replace the factory settings with performance-oriented ones. These Street Runners are for Stock Cars; they provide maximum power at wide-open throttle and delay converter lockup for smoother shifting(more)

Description: These Street Runner Power Chips are replacements for your GM computers stock PROM or memory chip which holds the factory settings that control your fuel flow and spark advance. These Power Chips replace the factory settings with performance-oriented ones. These Street Runners are for Stock Cars; they provide maximum power at wide-open throttle and delay converter lockup for smoother shifting but don affect the idle or part-throttle settings so your mileage and emissions aren affected.(minimize)