LS5 ● Confirmed

Pontiac · Regular Production Option

455 HO (335 hp gross / 310 net)

Years 1971–72 Models 2

Also described as 455 HO (300 hp net)

Documented applications

Firebird / Trans Am →

• 1971–1972 ● Confirmed

  Std Trans Am ’71–72, opt Formula

GTO →

• 1971–1972 ● Confirmed

  GTO; same UPC documented on Firebird ’71–72

• 1972 ● Confirmed

  GTO option

This page aggregates every documented appearance of LS5 in the Pontiac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.