Tim
Assembly line filter are an ongoing debate among ODs and Pontiac restorers. Unlike Chev who appear to have used a black stencil AC filter for assembly line only,Olds and Pontiac are unknown. Olds engines appear to have heavy overspray on the filter at engine assembly and were not identifiable like the Chev ones.
As your Firebird is a 1999 the blue filters were likely all the same. In you photo I don’t see any paint in the area, your filter may be the original.
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1971 W30 convert, triple green,second owner.
1971 W30 Convert, special order Rally red, completed
68 Camaro Z28,Corvette Bronze,Houndstooth
2016 Porsche Carerra Cab and 2021 C63S AMG ,modern fun.
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