Best performance MOD for 2015 GTS ?
 

Not much you can do to a NA engine

an ecu tune seems to be the only real option and i would have to wonder if the gains are worth the expense. at least an exhaust will make it 'sound' faster.

https://www.vividracing.com/tuned-ec...151570060.html

GTS already has a pretty sweet exhaust

I'll be installing a Eurocharged ecu tune here in the next week or two. I'll report back with a review and whether or not I feel as though it was worth it.

This is exactly the reason why I wonder people pay the same price for a GTS as a turbo.

i agree, but the alcantara interior and exhaust note seem to be the main draw. my turbo was so well optioned, it made it a no-brainer. on top of that, a tune on a standard turbo yields 575hp minimum. hard to complain about that when the na4.8 has little room left.

Alcantara doesn't age well, and it costs 1,500$ to make the Turbo sound really good. Another 1,000$ buys you a 600hp flash.
What am I missing ?

I have a 2013 GTS and the alcantara is still perfect.

Same here

not sure of your point. you seem to be suggesting the turbo is the wise choice, but that is also the choice i made.
a big factor for me was ventilated seats - decided it was a must - and not available on the GTS with alcantara. i did find several GTSs with leather and ventilated, but i wound up with 4-zone and vented/heated seats front and rear! could not pass that up.
i also have not seen a 600hp rated flash for a grand. who has that?