Replaces: 13220
GM420 V8(87-89), GM425 V8 454 (90-93), GM425 Gen-VV8 454 (92-93), GM440 TRS 454 (83-86), GM450 V8 454 (95-96), GM460 TRS V8 482 (83-86), GM465 V8 502 (90-92), GM465 Gen-V 502 V8 (92-94), 500 Gen+ GM502 V8 (1999), 500 Gen V 502 V8 (94-98), 500 Buldog 540 V8 (90-01)