Had D-specs installed on the G about a month ago and right off the bat knew something was wrong. Took it right back to Stillen and complained about a 'hollow knocking' sound coming from the driver side shock. Of course they claimed 'nothing was wrong.' A few weeks pass and I take it to a different shop to have the shock looked at. Sure enough the the D-spec was completely blown out. Everytime I hit a bump the shock would just bottom out; no dampening what so ever. Complained a bunch to Stillen and finally had them cover it under warranty. Still had to buy an additional shock so they can send mine back for 'investigation' - then I can get reimbursed, hopefully.
Anyway, have your new shocks checked out before you waste all the time and money I did.

 

Are you on stock oem springs or aftermarket springs?

 

Surprised that wasn't noticed on install if damping was zero.

 

I agree RBull... it really pissed me off.

I'm running G H-techs.