Mangusta brakes are a crapshoot as far as what's OEM. Many Gooses had aluminum 2-piston Girlings front and back (same as 427 Cobras & priced accordingly), but not all. Steve Liebenow's "Blue Goose" had iron 3-piston Girlings on small 9-1/2" OD rear rotors, and I've heard of others being OEM. Get out the tape measure & camera before ordering parts.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.