HP Tuner and tuning the 6.2 L and 6LE80 in 2014-2019 Engine, Driveline, & Exhaust Posted July 31 I have head,cam, forged pistons plus all the bolt-ons in the that combo. It's will blow the tires off 1-2. But it won't chirp the tires like my wifes Scat Pack or her old SRT8. Once it looses traction it's gone and the tires just start spinning. I set the trans to shift harder at one point but in the 6l80e it just feels like it's going to break sometime.