Valve Spring. Models: HT 101 HT 103 HT 105 FS 87 R FS 90 R - 4180 FS 100 R FS 89 R FS 91 FS 91 R HT 131 HT 133 HT 135 FS 130 FS 130 R FS 310 FR 130 T FC 110 FC 100 FS 311 FR 131 T FS 131 FS 131 R FS 111 FS 111 R SP 90 SP 90 T HL 100 K HL 100 HL 95 HL 95 K KM 130 R KM 131 R KM 111 R KM 90 R KM 100 R BT 130 BT 131