FREE Classic Car Inspection Checklist "https://gearheadgarage.systeme.io/gui..." Inform Yourself Before You Buy With My Classic Car Buyers Toolkit - "https://gearheadgarage.systeme.io/too..." In this second part of my two-part series, we’re breaking down the 21 worst upgrades commonly seen on classic muscle cars and why you should steer clear of them! From performance mistakes to cosmetic missteps, these modifications often cause more harm than good. Whether you're restoring a muscle car or just looking to improve your ride, I’ll help you avoid the most common mistakes that can wreck your classic car’s performance, safety, and value. Part 2 Highlights: 12. 7" Brake Booster 13. Transmission Cooler 14. Tall Hood Scoop 15. Turbos 16. Roll Bar 17. Racing Harness 18. Cut Out Dash 19. Wide Wheels 20. Fender Flares 21. Alarm #ClassicMuscleCars #CarModifications #WorstCarMods #MuscleCarMistakes #CarRestoration #MuscleCarFails #CarUpgradeMistakes #CarModFail #MuscleCarBuild #RestorationTips #CarBuilding #ClassicCarFails