Engine profile

Pontiac 455 HO V8

Pontiac V8 · 455 cubic inches · Pontiac

1970 GTO hood and scoop detail; same-year Ram Air/body context only, not Royal Bobcat identity proof. 1970 Pontiac GTO Royal Bobcat

Engine Summary

Manufacturer: Pontiac
Family: Pontiac V8
Displacement: 455 cubic inches

Also Known As

455 HO455 H.O.455 High Output455 cid HO455 CID HO V-8L75L75 455Pontiac L75 455 HOPontiac 455 HOD-port 455 HO455/360 HP HO455 ci 4 BBL HO V8Royal Bobcat 4551970 Royal Bobcat GTO 455Royal Pontiac 455 HO1971 455 HO1971 Pontiac 455 HO1971 GTO 455 HO1971 Pontiac GTO 455 HO1971 GTO Judge 455 HO1971 Pontiac GTO Judge 455 HO1972 455 HO1972 Pontiac 455 HO1972 GTO 455 HO1972 Pontiac GTO 455 HO1972 Pontiac GTO 455 H.O.455 HO Ram Air1971 Firebird Formula 455 HO1971 Pontiac Firebird Formula 455 HO1971 Formula 455 HO1971 Pontiac Formula 455 HOFormula 455 HOLS5 Formula 455 HO1971 Firebird Formula LS5 455 HO1972 Firebird Formula 455 HO1972 Pontiac Firebird Formula 455 HO1972 Formula 455 HO1972 Pontiac Formula 455 HO1972 Firebird Formula LS5 455 HO1972 Formula 455 HO LS5455 CID LS5 HO Ram Air V-8 Formula1971 Firebird Trans Am 455 HO1971 Pontiac Firebird Trans Am 455 HO1971 Trans Am 455 HO1971 Pontiac Trans Am 455 HO1971 Firebird Trans Am LS5 455 HOTrans Am 455 HOLS5 Trans Am 455 HO455 CID LS5 HO Ram Air V-8 Trans Am

Cars Using This Engine

9 linked car pages.

hardtop coupe / convertible

1970 Pontiac GTO 455 HO

455 cu in Pontiac L75/HO V8

1970 GTO hardtop or convertible donor context; Royal Bobcat identity requires Royal paperwork, kit receipts, period photos, owner history, or equivalent car-specific evidence rather than decals or tune-up claims alone

1970 Pontiac GTO Royal Bobcat

Royal Pontiac dealer tuning or Royal-supplied Bobcat kit

2-door coupe

1971 Pontiac Firebird Formula 455 HO

1971 Firebird Formula 455 with optional LS5 455 HO, including Ram Air configuration where documented; not a Trans Am appearance package.

2-door coupe

1971 Pontiac Firebird Trans Am 455 HO

1971 Firebird Trans Am series 22887 with standard LS5 455 HO, shaker cold-air hood system, spoilers, fender extractors, F60-15 tires, and Trans Am identification.