Part profile

Pontiac 455 HO engine assembly

Name: Pontiac 455 HO engine assembly
Brand: Pontiac

engine part · Pontiac

Reference graphic summarizing the LS5 455 HO 335 hp engine table and Ram Air carburetor distinction. 1971 Pontiac Firebird Formula 455 HO

Why It Matters

The 1971-1972 Pontiac 455 HO engine assembly is tracked separately because the round-port 455 HO, Ram Air availability, and engine-code evidence are core authenticity checks for GTO, Judge, Firebird Formula, and Trans Am claims.

Also Known As

Pontiac 455 HO engine assembly1971 Pontiac 455 HO engine assembly1971 GTO 455 HO engine assemblyround-port 455 HO engine1971 455 HO round-port engine1971 Firebird Formula 455 HO engine assembly1971 Pontiac Firebird Formula 455 HO engine assemblyFormula 455 HO engine assemblyLS5 Formula 455 HO engine assembly1972 Firebird Formula 455 HO engine assembly1972 Pontiac Firebird Formula 455 HO engine assembly1972 Formula 455 HO engine assembly1972 Formula 455 HO LS5 engine assembly455 CID LS5 HO Ram Air V-8 Formula engine assembly1971 Firebird Trans Am 455 HO engine assembly1971 Pontiac Firebird Trans Am 455 HO engine assembly1971 Trans Am 455 HO engine assembly1971 Pontiac Trans Am 455 HO engine assemblyLS5 Trans Am 455 HO engine assembly455 CID LS5 HO Ram Air V-8 Trans Am engine assembly

Used On

5 linked car pages.

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.