FIC injector pigtail adapters for USC to EV6 are sold as a set of 4 or a set of 6. Compatible with some FIC injector sets for Evo, DSM, WRX, STi, 3000GT, Stealth, GTR, 350Z, 370Z and more! Evolution I-IX & 90-99 DSM 4G63 (PGT USC4) Fits: FIC High-Z 650cc (IS126-0650H) FIC High-Z 775cc (IS126-0775H) FIC High-Z 1000cc (IS126-1000H) Evolution X 4B11 (PGT USC4) Fits: FIC High-Z 650cc (IS127-0650H) FIC High-Z 775cc (IS127-0775H) FIC High-Z 1000cc (IS127-1000H) Subaru WRX & STi (PGT USC4) Fits: FIC High-Z 650cc (IS175-0650H) FIC High-Z 775cc (IS175-0775H) FIC High-Z 1000cc (IS175-1000H) Mitsubishi 3000GT/Stealth (PGT USC6) Fits: FIC High-Z 650cc (IS135-0650H) FIC High-Z 775cc (IS135-0775H) FIC High-Z 1000cc (IS135-1000H) Nissan R35 GT-R (PGT USC6) Fits: FIC High-Z 650cc (IS188-0650H) FIC High-Z 775cc (IS188-0775H) FIC High-Z 1000cc (IS188-1000H) Nissan 350Z/370Z (PGT USC6) Fits: FIC High-Z 650cc (IS186-0650H) FIC High-Z 775cc (IS186-0775H) FIC High-Z 1000cc (IS186-1000H)