Super COPPERMIX Twin Competition The Super COPPERMIX Twin Competition is a serious competition clutch unit with the ability to handle over 740 HP. Vehicle | Model | Engine | Part No. | Skyline GT-R | BNR ~’93/2 | RB26DETT | 3002A-RR593-C | BNR32 ‘93/2~ BCNR33 | RB26DETT | 3002B-RR598-C | BNR 34 | RB26DETT | 3002B-RRR47-C | Skyline | R32 | RB20DET | 3002A-RR593-C | R33 | RB25DET | 3002A-RR593-C | R34 | RB25DET | 3002B-RR598-C | Stagea | 260RS | RB26DETT | 3002B-RR598-C | WGNC34 | RB25DET (4WD) | 3002B-RR598-C | |