Modifications significantly reduce resale and collectability, prompting some buyers to skip heavily modded cars; superchargers address the S65's weak stock torque but face CARB hurdles in California, and buyers scrutinize whether advertised rod-bearing upgrades were actually installed.
Modifications, superchargers and resale impact
BMW E9x M3 (E90/E92/E93, 2008-2013) · originality