Racingline Rear Sway Bar
 

Very nice, quality made part. I used the inner holes for the stiffest setting and the results are incredible. The car feels balanced, removing the gobs of understeer inherent in our cars. The customer service was not top notch but the product was well worth the waiting and frustration. I want to purchase their Y-Pipe, it looks like a superior design.

I have their y-pipe for sale. New gaskets included and no wait. Send me a PM.

I also find the rear sway bar to be a nearly required addition.