Well on the way home it threw misfire codes on cylinders 1,2,3.I drove it over 200 miles and it drove fine yeah it was alot slower than my redline and it had a little smoke off 1st which I read was common on these cars.I got it checked at berglund the leakdown results were over 30% thats the only way GM would replace the engine.Its not a huge deal cause its still under warranty I forgot to mention that one. The redline was great but the aftermarket support was so slim so I sold it.The carfax showed it did receive a new head like 15k miles ago I could tell it was fixed looking at it but I mean car didnt act like a broken engine would imo.But its all good warranty has it covered and I basically got a new engine in a car that I paid 13,500 for.