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      11-29-2012, 04:45 AM   #9
AC Schnitzer UK
United Kingdom

Drives: over 200mph
Join Date: Nov 2012
Location: Norfolk UK

Posts: 59
iTrader: (0)

It's unburnt fuel from the engine burning in the exhaust. Perfectly normal. On some engines the fuel injectors are shut off completely on the overrun but this tends to make the ride jerkier. If you were permitted to run an open exhaust from the turbo onwards you'd see flames at night...