Fits aftermarket CVK20, aftermarket and OEM FCR-MX, PD22, PE20, 26, 28 and 30mm; PWM 34, 36, 38mm; PWK28 33, 35, 38, 39mm; PWK36 Quad Vent; PWK35, 38 Quad Vent/Air Strikers High-quality replacements; NOT original Keihin jets Sold to dealer as 4-pack; sold to consumer as each. PILOTJET N424/21-58