whoops just saw this now.
Either one is good. I got my exhaust installed at stett, and everything went great! My brother has used autoscope for his cars in the past and no complaints from him
2009 128i Coupe Crimson Red
MODS: -Injen Intake-Magnaflow Exhaust-Carbon Fiber Spoiler - Carbon Fiber Grilles - OZ Ultraleggeras - CF Mirrors