For Sale SOLD! Dual Quad setup consisting of intake, primary carb, secondary carb, linkage and kick down bracket. Primary carb 3925 SA A?4 Secondary carb 3645 SB CK4 Ran both carbs on my GS while the originals were being rebuilt by Carmen. They performed well. Price is $2100 for the setup, plus shipping lower 48 states only. Cross posted at BCA forums and 65GS.com