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******** SHO autocrosser said:cc839 / cc858. These are the same ones I usually get. I will go measure the coil thickness of new vs. old. Be back in a bit.
shomesomesho said:Measured coil diameter:
Moog CC858 (front) purchased 2 months ago: 16.5 mm
Moog CC858 (front) purchased 1 year ago: 17.5 mm
Uh-oh.

shomesomesho said:I purchased a set of Moog CC's a couple months ago for my wife's car. I was surprised to find that the coils are thinner by about 1mm, compared to a set of Moogs I had bought a year ago.
Once installed, they settled an additional 1/4" within a few days. The ride is also noticeably softer than the stouter Moogs of old.
Storm-Chaser said:If you'll look closer at the coils, you will notice the older coil springs have a thick plastic-like coating, wereas the newer coils do not. The newer coil springs are now simply coated with a very thin layer of dull black paint, which looks to account for all of the 1mm difference.
The change occurred sometime after 2005, as the three sets of 858/859s I've bought, had the following dates on the bottom of the box:
CC85807/14/05 - coated
05/09/06 - not coated
10/05/06 - not coated
CC85906/28/05 - coated
08/31/05 - coated
09/13/06 - not coated
Storm-Chaser said:If you'll look closer at the coils, you will notice the older coil springs have a thick plastic-like coating, wereas the newer coils do not. The newer coil springs are now simply coated with a very thin layer of dull black paint, which looks to account for all of the 1mm difference.
The change occurred sometime after 2005, as the three sets of 858/859s I've bought, had the following dates on the bottom of the box:
CC85807/14/05 - coated
05/09/06 - not coated
10/05/06 - not coated
CC85906/28/05 - coated
08/31/05 - coated
09/13/06 - not coated
SASHO91 said:hmm... wonder why they did that...
Im pretty sure mine are the thicker of the two, as mine are over 2yrs old.
still pretty dam firm too.