Well finally reached break-in mileage and took the car to ventura and did some spirited driving on the highway as well as some side roads, buddy that I was driving with in a GT350 (i know i know
) said he noticed some puffs of black smoke coming from my tailpipes when going full throttle.....the car is basically stock aside from a throttle body and catback borla exhaust, is this normal to have black smoke coming out when going full throttle? Something I should keep my eye on?