For anyone interested that doesnt want to put the time into hacking up their stock springmounts in the rear to get the extra 1/2" of drop ive found the correct fitting energy suspension isolaters.
Part #
Energy Suspension 9.6120R Coil Spring Isolators

They are 5/8" thick so they will give you the 1/2" drop of cutting your stock ones. They fit right in perfectly above your stock rear springs and fit perfectly into the mount that holds them in place.
Using them in my car right now and am very happy i paid $20 bucks for them and didnt have to spend 2 hrs chopping at my oem ones.

 

Oh nice, so this part replaces the oem spring mount?

 

Yea its a straight swap

 

Nice find. Great info for others who want this done.

 

Have you noticed any excessive bottoming out? I think the center portion of the oem spring mounts are bumpstops?

Sparco: 9-6108R/9-6108G is the same inside diameter, but slightly larger on the outside, its also .875" tall versus .625" for version Twizted listed. Not sure if it would fit the same.

 

Car feels the same even after the new isolaters.....no bottoming out.
I believe the bump stops are on the actual rear shock. The cone on the oem rear isolater seems to be pointless,,, if it was an actual bumpstop it would need something to "bump" into to stop travel but there is nothing there in the rear.

 

Where did you buy them for $20

 

Wish I would have seen this 2 days ago..

 

Great find!

 

man this would have saved me time using the hacksaw a year ago...that was a lot of rubber to sit awkwardly, hold, and saw

 

Sweet. With my turbo kit my rear sits slightly higher now. THis is perfect
$27 on ebay?
http://www.ebay.com/itm/Energy-Suspension-Coil-Spring-Style-A-9-6120R-/310245943971?pt=Motors_Car_Truck_Parts_Accessories&hash=item483c196aa3&vxp=mtr

 

Awesome...that cutting is a pain

 

The pads will move around since the ID is is larger than the tabs that keep the original mounts in place.

 

Can you post a picture of your car before & after OP?

 

Actually the part that is bumps into is called the spring bucket.

 

i think you need that cone shape. helps keep the spring centered.

 

I would tend to agree.

 

The id is slightly larger but the od is the same...the rubber doesn't move anywhere.
The whole keeping spring centered and you need the cone for this and that I think is not really accurate. The cone doesn't have anywhere to contact so its not a bumpstop, The od of the spring keeps it centered in the mount so its def not going anywhere.
Im on 6+ months and everything is still like the day I installed it and it still rides very nice.

 

I think the importance of the cone-shape will depend on how bad the roads you drive on are. For the most part you should be fine with those.

 

Right... but people keep referring to the cone as a bumpstop when its not. The bumpstop is on the shaft of the rear shock itself. It keeps it from bottoming out.