I just ordered the OEM like aerokit from the ebay seller (back in stock at $199) and the GT2 side skirts. I was told by my dealer that the aerodynamic performance at high speed will be affected. What do I need to improve the stability for my '12 TTS? Aerokit rear diffuser and/or spoiler? GT2 rear diffuser and/or spoiler

Thanks

 

I don't think you'll need to change anything with just the Aero Front Lip and the GT2 Side skirts.

If you add an OEM GT2 Spoiler, that adds a huge load of Down Force compared to OEM Turbo S Spoiler.

 

Honestly man, its what you like. Not someone else.

 

what his user name on ebay

 

If it's the full GT2 front bumper with GT2 splitter, then your dealer is right. You'll be carrying an uneven amount of down-force up front at high speed and should look into the GT2 rear wing to add more downforce in the rear.

PS. where in canada are you?

 

Ebay link
http://www.ebay.com/itm/221457378303...84.m1436.l2649

It's a mix of aerokit front lip and GT2 side skirts. I do track at Mosport so I would like to know that my car is aerodynamically safe. Still not sure if I need the aerokit/GT2 rear diffuser/spoiler. I like my current TTS dynamic spoiler and not a big fan of fixed.

I'm in the GTA

 

To be honest, I wouldn't worry about that one.

The splitter in the image below is where you may run into unbalanced front/rear down-force.