From '75 through the Weissach special editions in 1980
This or a variation was the n/a M473 option from the factory
There were 5 versions used on n/a and 1 for 930 thru 1977
type A long one piece f/g used on Carrera 3.0RS and IROC
type B short 2 piece w/ single large forward grille
type C short 2 piece w/ single large forward and single small aft grille
type D short 2 piece w/ single large forward and single mid size aft grill, used on all 930s and n/a w/ A/C
type E, all p/u single large forward grille
Type D used on all 930s and all n/a w/ A/C
type C
type B
