first that all i have a 997 tt red with Exhaust system tubi, Plus Giac Ecu and carbo fiber air box champion, but i want more power so i was wondering to get a new gt2, or, get the Techart Gt street stage 3 package to 700hp, so i dont know what you guys tell me about that.
I just talking about the engine, not the Techart GT strret full package.

 

I'm guessing that you are talking about the EVT700 which is shown on the Gt street exterior.

I had similar components as you and I was able to keep some .It won't be the "true" EVT700 because it has a different airbox and exhaust .

Some of the parts were airbox, exhaust, intercoolers, headers , and the modified turbos . I also upgraded the clutch to accomodate the HP . My car already had the IBD plenum and i kept that ..
I may have forgotten about hoses and clamps but someone else here might know the exact technical details more .

I did have the car reflashed after the Turbos were added .

BTW --the difference is tremendous and I am extremely happy.

 

Do you have any Dyno results for your current car so you have a baseline to work with?

With Tubi and Giac you have probably gained 30-40 hp over stock which would put you just a tad under the GT2's 530hp. Get a GT3 RS and mod the crap out of it. That's my suggestion.

On the EVT700 listen to yrralis1. He knows his stuff and unlike a lot of folks that frequent this board nowadays, he actually HAS the mods he talks about.