I'm definitely going to do the tune and cat back bypass pipes. My tuner uses EVOM. What else would you recommend I do within reason to improve performance (e.g. Within an additional $5,000 installed in addition to the cost of tune and bypass)? Does someone make a 3 inch full exhaust or does it have to be custom manufactured? Thanks for you input!

Yeah hanksville motorsport offers a full 3 inch exhaust . Check their facebook page . They did a 958 TT .

The mods if you ask me shohld be full 3inch exhaust , ix80 manifold, custom y-pipe or ipd plenum , bmc airfilter and a remap . That should put you around 650hp with 1.2bars

Thanks for the lead on Hanksville! What exactly is a ix80 manifold?

Its somekind of ported manifold from factory offered with turbo S or ix80 powerkit . Pm ed you the part number

its a complete waste of money. For that money you can put in bigger turbos and get real gains.

Are you sure its useless ? Do you have it ?
I bought mine for 950 $ .Its the best cosmetic mod I have done to the car , it completely transform the engine bay look and my neck tells that I put more hp than a 850$ ipd plenum and 1200$ y-pipe.
Also the turbocharger upgrade will cost you around 5K

What is the part number on the manifold? Might be interested in it.

Id also pass on the IPD plenum. I remember a couple years back there was a big argument about it.

When did I say it was useless? And I HIGHLY doubt you got the intake for $950 on the 958. Nice try kiddo.

I have a panamera turbo ,not a 958 . Do you want to see my receipt ?