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Performance Upgrades vs. Cost

Engine

Model: 911 Turbo, Year:1991, Mileage:92,000, Type of use:Street use only
I spent a lot of money on upgrades to what was a factory stock Turbo and had installed B&B triflow headers and muffler, and 1 bar wastegate spring. Tweaks like cam adjustment and collapsible drain tubes, catalyst removed. I've not had the car dyno'd and am curious what these upgrades have done to improve power and performance - apx. how much more hp and torque have I picked up? The car is in excellent condition, can these upgrades cause premature engine wear or potential failure? Thank you for your assistance!

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