kos11-12

Hi guy I bouth some rear 993 calipers form ebay Germany the seller as advertise them as part 993-352-42100 and 993-352-422-00 but when I mesure the diameter of the piston it a 30mm piston witch tell me it is just a C4 pistonalso there is a number inside witch doesn't make sens 95 in middle then 20.4673.00
thanks for your help konstantin

Bill Verburg

there are 2 different(not counting RS and tt) 993 rear caliper specs
C4 use 28/30 and are silver(usually) 993.352.421(2).21
C2 use 30/34 and are black(usually) 993.352.421(2).00

the pistons are measured at the wide part below the rubber dust boot

kos11-12

yes Bill, thanks the seller advertise them as 993 rear 964 RS but when they arrived piston were 30/28 not 34/30 what a waist of time and money the pad lenght is 98 mm but still it is a 964C4 not a 993 or964 RS some peopol on ebay!! so fed up, now I have to put a claim ect.. more waist of time
anyway thanks again Bill
Konstantin

Bill Verburg

930 f/r, 964 f/r, 964RS r, 964t r, 993 r all the same pad, ~98x44mm aka pad Pagid size # 1203

boxsey911

If you don't have much luck with the claim you should be able to re-sell them on ebay. They're a much desired upgrade for the early 964 C2s which have two pot rears. I was looking for a pair myself a while back but ended up getting some 928 S4 calipers which are the same size. This was thanks to the help and advice from a number of Rennlisters including Bill .

Have you upgraded the front calipers already? Again the advice I received on here is that 30/34 rears are too big if you're sticking with standard 964 front calipers.

BTW How much did you pay? The going rate for a good pair of 30/28 calipers in the UK seems to be about £200.

kos11-12

hi Steve ,I will fit big blacks on the front with 330x32 AP alloy hats, paid 197 € inc post (145 £ with actual exchange rate )they are very clean the seasl look very good and fronts have been repainted with new stickers but there are not usefull to me.
Konstantin C4

boxsey911

That was a good price in my opinion. You could probably turn a small profit if you sell them on. As I say, I upgraded my 2 pots just recently but if I hear of anyone on the UK Porsche forums that are after similar calipers I'll let you know.

BTW there are a pair of 993 calipers advertised here:

http://www.type-911.co.uk/up993.htm

but even though they are black, make sure you check with them that they are the C2, larger piston version that you are after.

kos11-12

thank you Steve ,I will call the seller tomorow ,please let me know if you know someone who is interested on the C4 rear calipers they are realy nice and clean, it is crazy I have to use an internet translater to put a claim in ebay Germany as it is all in German ,
Konstantin C4

f@tboy

Hi Konstantin, you have mail.
Nick

Oracle

Hold on...
Did you actually take the piston out? This is critical because the part that sticks out the dust boot is smaller and that's not how you measure the piston... you may have got the right part!

kos11-12

Hi ,of course not, you can mesure the piston without pull it out, with a vernier or even with a rula it is so straight foword it can only be 30/28 or 34/30 and it is at the piston not at the outside of the seal I suppose.
Knstantin C4

kos11-12

hi Steve I have e-mail Nick with some pictures .
thanks Konstantin