8. 1981 Pontiac Firebird Formula
The 1981 Pontiac Firebird Formula’s V8 engine was hampered by restrictive factory tuning, leaving performance enthusiasts underwhelmed. By installing aftermarket camshafts and upgrading to improved carburetors, owners were able to unlock the muscle and speed worthy of the Formula name. These modifications revitalized the car’s reputation as a true performer. Learn more about the Firebird’s legacy at Motor Trend.