1971 Pontiac Firebird

 The 1971 Pontiac Firebird with the 455 cubic inch V8 engine was a powerful muscle car, available in the performance-focused Formula and standard Trans Am models, featuring the 455 HO (High Output) engine producing 335 hp and 480 lb-ft of torque in net ratings, offering strong acceleration with its shaker hood scoop and distinctive styling. These models represented the peak of the second-generation Firebird's performance before emissions regulations significantly impacted horsepower figures in following years, making them highly desirable.  

 Key Features:

• Engine: The 455 HO (High Output) V8 was standard on the Trans Am and optional on the Formula, delivering substantial power.
• Models: Available as the sporty Formula (with or without the 455) or the iconic Trans Am.
• Styling: Featured the aggressive second-gen F-body design, including wide flares, spoilers, and the iconic "screaming chicken" hood decal on the Trans Am, notes Hagerty and Facebook, according to a Facebook post and Over-Drive Magazine.
• Performance: Known for raw power, with 13-second quarter-mile times in some configurations.
• Transmissions: Offered with 3-speed manual, 4-speed manual, or Turbo Hydra-Matic automatic options.
• Unique Hood: The "shaker" hood scoop was functional, feeding cold air directly to the carburetor. 

Significance:
The 1971 models marked a sweet spot, balancing big-block muscle with cleaner styling before emission controls drastically reduced performance, establishing them as symbols of the classic muscle car era.  

$35,000