You can find Joe's story and excellent writeup of a Mod Journal in these threads:
Phase 1 - Exhaust Systems
Phase 2 - Headers & Catalytic Converters
Phase 3 - Camshafts
Phase 4 - Tuning
Turbo Phase 1 - Meditation
Turbo Phase 2 - Realization
Turbo Phase 3 - Realization pt2