NGK, BR4ES
NGK, B.S.A.: Model: C10 (Aluminum Heads), GAP: 0.02; Model: M20 (Aluminum Heads), GAP: 0.02; Model: M21 (Aluminum Heads), GAP: 0.02; Model: M21 (Aluminum Heads), cc: 600, GAP: 0.02
NGK, B.S.A.: Model: C10 (Aluminum Heads), GAP: 0.02; Model: M20 (Aluminum Heads), GAP: 0.02; Model: M21 (Aluminum Heads), GAP: 0.02; Model: M21 (Aluminum Heads), cc: 600, GAP: 0.02