Jonnygo1

Can someone please clarify which caliper I have....Brembo part #20 4564 00 on one side and #20 4565 00 on the other.

Bill Verburg

pics would be more helpful for id's

Jonnygo1

Here are some photos...

ThomasC2

looks like a "big red" caliper but in yellow...just a guess

PointBy

That looks like an old, discontinued Brembo F40 4-piston caliper. It was used on the Ferrari F40 and some Jaguars, I believe. That's a nice refinish job except the bolt holes should never be painted or powdercoated. That interferes with getting it torqued down properly.

Bill Verburg

A front side pic would help, but they look like 928S4/993 front calipers, you can't measure the pistons like that, if you go uder the seals and measure the widest part of the pistons they are probably 36/44, it's quite normal for the bolts and external line to be painted the same as the rest of the caliper, it is in fact how they all come from Porsche.

The pad retainers are typical Porsche springs, an F40 caliper would have twin pins.

W/o seeing the front side, there is an out side chance that it's a big red. The difference between the big red and 928S4/993 caliper is the height of the pads, 928S4/993 pad is ~132x48mm, big red ~132x58mm

the difference between the 928S4 and the 993 is trailing vs leading mount.

There is one other front axial mount version of the 928S4/993 caliper that was used on 964t and 964RS, but that version had extended mounting pads that don't appear to be on those.

Jonnygo1

Sorry for beating this horse, but I don't want to buy the wrong rotors!

Bill Verburg

Again, a front side pic is needed,

this is a 928S4/993/964RS/964 t front caliper


this is a Big Red


The big red is ~ 10mm taller and so visually looks chunkier and it has the lump in the middle of the front side

Jonnygo1

Sorry, wasn't sure which photo you needed. I'll post one tonight. Thanks SO much for your patience!!!

Ag02M5

Where did you pick those up? They look like my old ones.

Jonnygo1

Ok, now that I've seen your photos, it seems pretty clear that these are not big reds, but 993nb.

What would be the approximate cost difference between going with the 993 parts in front rather than the adapters?

Thanks again for lending your expertise.

Jonnygo1

Here's the photo, sorry.

Ritter v4.0

I'd say the guy who told you ab initio these were 993NB fronts was correct.

Nice shade of yeller btw.

Jonnygo1

I knew you wouldn't be able to resist....just wanted to be sure because it seems that everything I do is wrong the first time! I'm going to go with the black lettering, though.

Bill Verburg

You'll have to do some shopping, 993s are being parted out all over the place. The 993RS parts are going to be expensive