I cant rememeber what they weigh now but its a abit lighter than a standard N10 Pulsar caliper.

they are off a british metro womby- doubt they will haver a hi iron content... maybe wet carboard

I just re-read the post title my calipers are NOT alloy. Ooops!!!

And i use the tried and tested 4 spot volvo calipers under my 13's

Already got a set of metro's sitting in the shed. can get a few different types of pads for them also. Got to get some new rotors before I try fitting them up.

Try the metro turbo ones wombat, I think they are the desired ones

I used 28.2mm thick discs from wilwood, the ultra light series

Thats alot of disc for a 13"
30mm thick and chunky

I'd look at trying to squeeze some RX7's under there before I went anywhere near the Skyline ones

It is possable to use the R32/33 skyline calipers under 13`s. I use them on my circuit car using 13" rims. A bit of work, but achievable. The standard caliper mount has to be cut off and remade tho.

The MK63 is cast iron though
And pricey for what you get

Theres not many 4 pots that fit under 13's