Mine did it for a few thousand miles, it was the cosmoline burning off.
2014 Sterling gray GT 6M
Paxton Novi 2200, DW1000 injectors, JMS BAP, ATI damper
Lethal ORP, MGW shifter, BMR upper and lowers, Spicer 1 piece DS, Ram Single disk clutch with aluminum flywheel, Power leather seat conversion. Staggered wheels.
605 RWHP on a safe tune