Here i offer a variation of the 312-294mm Brake System for the E30 with 4x100 under using the E38 725tds-730i-735i BREMBO caliper with 4 pistons in front.
This brake system ist build for 17 inch wheels. On E30 will fit the AZEV in 8x17 ET30 with 20mm distance plates and the OZ RECORD 7x18 ET38 with 25mm distance plates.
Rear you can use the 294x19mm Brake System with BMW 1-piston caliper (E34 540i-E32 750i, M3 E36) or 4-piston caliper (PORSCHE 986-996).
... to the shop offers ...AnleitungenDescription 312x25mm Conversion with E38 730i calipers E30 FrontDescription 294x19mm Conversion with E34 540i calipers E30 rear Description 294x19mm Conversion with Porsche 986 calipers E30 rear