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Pontiac GTO 5th Generation (Monaro)

20042006 · Holden Monaro (VZ) · coupe

Fifth-generation GTO based on the Holden Monaro VZ. 5.7L LS1 V8 (350 hp, 2004 only); 6.0L LS2 V8 (400 hp, 2005-2006). 6-speed Tremec T56 manual or 4-speed 4L65E automatic. RWD only. Built in Australia. Total US production: 40,808 units. Often criticized at launch for conservative styling; in retrospect, a benchmark LS-platform sleeper.

Watch out: LS1/LS2 cars have rear-end (Australian-spec) parts that don't share US Camaro/Firebird interchange — driveshafts and differential mounts are GTO-specific. Otherwise LS engines themselves are bulletproof; bell-housing alignment for clutch swaps is a known fiddly job.

Full clubhouse — owner Garage Lineage, common problems, year-by-year notes, and product picks — is on the build list.

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