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This black on black 2010 997TT Cabriolet came into us for a SharkWerks Stage II power level upgrade. On tap was the EVOMSit tuning calibrated for 91 octane, the EVO diverter valve kit (from the 996TT days) and a new Tubi Exhaust system with high-flow cats.

With the turbo now on the lift here's a quick look at the factory muffler/cats:


Off comes the bumper, intercoolers and heat shields:


The Tubi Exhaust/cats and hardware ready to be installed:


Compared to the factory exhaust and cats:


With the factory exhaust removed you can see those VTG Turbos:



James installing the Tubi Exhaust and high-flow cats:


Here's the Siemens ECU getting set up on the bench ready to get a 91 octane powered EVOMSit tune...


Porsche went away from the boost recirculation valve set up found on the 997.1TT in favor of the previous 996TT set up. Luckily EVOMS has long been manufacturing their billet diverter valve upgrade. The diverter valves are located with one on each side up top (and nothing like the 996TT days).


And over to the other side:


With the bumper back on she's ready for a test drive and for some serious fun:


With the EVOMSit software installed and the Tubi exhaust the car almost touches the 600hp level and in PDK form is blindingly quick. Although the exhaust has an aggressive sport sound once you step on it the way Tubi designed their system even on a PDK/Cabriolet there is minimal drone/resonance so you can still listen to the radio.

Ready to go home:


 

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Even sharwerks cant help it. The turbo just sounds rubbish.
 

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Even sharwerks cant help it. The turbo just sounds rubbish.
:clap: well... from the factory it's really pretty tame/lame I'll grant that;) At least it does sound better than stock but nothing can touch the GT3 sound:clap:
 
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