Caliper identification HELP!!!

[e p slick]

Need to identify four calipers I hope to use on project car. They say Brembo on one side and Porsche on the other, measure 9" long X 5.5" width, have four cylinders each and one large pad on each side measuring 2" X 3.75". Bottom pair of cylinders measure 1.170" OD and top pair at 1.090" OD. The mounting bracket hole centers are at 3 5/8". One half of casting has number 2 86 204873.90 and the other half 1 86 20467200. Anyone know which car these came from? Thanks - Eldon

[MotoSook]

The raised PORSCHE script and webbing look like that of a 951 caliper. You'll have to measure the piston bore or top of the pistons. There are different sizes of bores too! They should be two different sizes for each caliper. Take the pads out and see what you got under them.All I know I learned from Bill V.