I recently purchased a lowered 1987 RX-7 base model (no power steering, no power windows, no sunroof) that has been expensively modified. So far I've identified the KYB Gas Adjust struts/shocks and the Mazdatrix Strut Tower/Firewall Brace with Engine Torque Brace, but who makes Mazda blue anti-roll bars and springs? The bars are pretty thick, at least 1" but possibly more. Heavy duty mountings all around, ceramic tape-wrapped headers, a resonator instead of a cat, and a very strong engine, obviously rebuilt. The wing on the back could go on a German Touring car. Ride is firm and steering excellent. Really curious if it's set up for track or street!

 

Turns out that they are Suspension Techniques springs and anti-roll bars, in case anybody else encounters blue bars and springs. The Mazdatrix guys identified them.

 

my ST bars are grey..

 

Apparently the old Suspension Techniques bars and springs were Mazda blue. Mazdatrix used to sell and install them.