How much would it cost to get 450 horsepower out of a 7.3.

 

Gauges - 400
Intake, exhaust, chip - 1,000
Auto - 4,000
Manual 1,000
Injectors - 1,500
Turbo - 1,600
Springs and studs - 700

Thosse are a rough estimate of prices so your grand total would be

Auto - 9200
Manual - 6200