General Motors option code

ZQ9

ZQ9: a General Motors factory option code reused for more than one part across 1970–1972 and 1 model — see the table for what it named each year, with installs and price where a source states them.

General Motors reused this code for more than one part over the years — read the "as named that year" column for what it meant on each row rather than assuming one meaning throughout.

1 model · 3 model years · 3 sources

Red 1970 Chevrolet Chevelle SS two-door hardtop with a black vinyl roof, black hood stripes, SS fender badge and Magnum 500-style wheels, displayed in the GM Heritage Center hall — 1970 Chevrolet Chevelle SS hardtop in red with black vinyl top, GM Heritage Collection (catalogued as an SS LS7) General Motors

Every sourced appearance

Year	Model	As named that year	Price	Installs
1970	Chevrolet Chevelle and Malibu SS	Rear Axle - Performance Ratio (LS6 - includes HD radiator) RPO	$10.55	3,348 Reported
1971	Chevrolet Chevelle and Malibu SS	Performance Axle Ratios, standard V8 and TH400 only / Performance Axle Ratios, LS5 only RPO	$12.75	302 Reported
1972	Chevrolet Chevelle and Malibu SS	Performance Axle Ratios, standard V8 and TH400 only / Performance Axle Ratios, w/L48, L65, LS3 & TH400 (RPO YD1) RPO	$12.65	296 Reported

Every row traces to the source it links from on that model's own year page; this table only collects them in one place.