They are not SS stripes, they were a stand alone optional stripe that was included in the SS package. Both the D90 and the DX1s were available to be ordered on most any non SS, Non Z28 Camaro. Very early 69 RS's appear to have been able to be ordered with the D96, and either the D90 or DX1 stipe sets, but later in production (like October/November of 68) the rule became only one stripe package could be ordered on a car. If you ordered an RS with another stripe package the D96 was deleted. The Z28 Rally stripe was not available on any car as an option, except the Z10/Z11 cars.