[Tectoniic]

The almighty butt dyno is a tricky beast. For a catback exhaust you don't need a tune. If you have a full cold air intake you probably want to get a tune or at least scale your MAF sensor by editing your ECU yourself. Most places doing a tune would be able to account for that and if you tune it yourself there are lots of helpful tips in the software tuning section. Tuning/scaling your MAF opens a whole different can of worms so best to read up a lot before picking an option.


There are a lot of variables that will affect throttle response and other factors that can change on a daily basis making the car feel faster or slower: Intake air temps, Gas quality, warm/cold tires having/not having grip, engine up to operating temp.