A 450-HP LS6 Chevelle Went Unsold at Mecum Harrisburg — Real Bidders Are Getting Pickier About Muscle Cars by Jack Harmon At the 2026 Mecum Harrisburg auction, a rare 450-horsepower LS6 Chevelle and a Six-Pack Challenger T/A both failed to find buyers. It’s a small sign of a much bigger shift rippling through the muscle car market this year.
