The 1970 Chevrolet Chevelle SS 454 LS6 was a hell of a muscle car. As experts say, it had an engine that produced the most power of them all. Namely, the Chevrolet Chevelle SS454 LS6 featured Chevelle V8 engine able to produce 450 hp. This was however underestimated. The engine was actually able to produce somewhere between 470 and 500 hp. This vehicle now costs 75,000 dollars.