Injen dual intakes and TurboXS catback. The HR responds well to breathing mods.

 

The 60ft is a big deal for the z.

 

Peak350 said it all, except I think that heating the tires a little helps as well, but note, just a little. No long burn outs. Just a couple of brief ones, especially if you have a base.

Work on the launch and the shifting, and you will get better. Practice makes perfect.