What is the horsepower difference of a stock Chevy2000 S10 and ZR2 both have 4.3 engines?
The horsepower difference between a stock 2000 Chevy S10 with a 4.3L engine and a 2000 Chevy S10 ZR2 with a 4.3L engine is minimal to nonexistent. Both trucks used the same basic 4.3L Vortec V6 engine. The ZR2 might have slightly different tuning (possibly resulting in a few horsepower difference), but any variation would be insignificant and not officially specified by Chevrolet as a significant difference in their marketing materials. The ZR2's performance advantage came primarily from its suspension and off-road capabilities, not a significant increase in engine power.