I want to put ventilated disc brakes on the tiger? from which type of Sierra must I order the disc and caliper?

I'm sure others will confirm, but if you are running standard front uprights and brakes (cortina) you cannot just upgrade to vented discs.

To upgrade to vented discs, people used to swap the calipers for Princess items with spacers and used capri (I think) discs.

Now most people seem to use the upgrade kits like the one tiger sells.

Hope this helps.

To be honest you realy don't need ventilated disks/4 pot calipers as the cars are overbraked anyway and you're just adding unsprung weight - if you want to upgrade or just add a bit of 'bling' the best bet are something like the Raceleda lightweight ones.

I have Princess calipers (you need a spacer kit to open them up) and discs from a 2.8 capri.

Overbraked I know but I like them and the calipers weigh about the same as the M16s...

Should be some piccys on my site...