LT Texan

I've had a set of front and rears in a box for about 10 years.

Casting numbers are

20.4564.00 and

20.4563.00

All have 86 above that.

Any idea?

Imo000

Since one piston is larger than the other, my guess is they are 86.5 calipers.

Mark Anderson

it would help to know the piston sizes.

LT Texan

Rears look 27 and 29mm diameter and

Fronts 41 and 35mm

Mark Anderson

1986 used 28mm and 30mm rear
36mm and 42mm front

LT Texan

Thanks Mark

LT Texan

I was looking to do a conversion to bigger brakes on my '78. I take it I bought the wrong calipers?

Imo000

Why do you say that? Early and later 32V calipers bolt up exactly the same way. You will not notice a difference.

Lopez

Related question:

I know the early US S cars use a different spindle and the calipers don't just bolt up to an OB like the S4 brakes will. My "new" car is an '82 with the competition package - does that include the ROW S brakes? Or is it just the suspension and spoilers? I can't tell by looking at them if they are the same as the brakes on my previous car...

thanks!

The Forgotten On

All 82 cars had S brakes (large single piston type) They have the same spindle as the Euro S cars up through 85 (we got 4 pistons in 86.5, they had it all of the 86 model year).

LT Texan

These are going on eBay