I have a set of three, 1 short, 1 medium, and 1 tall, Muroc Pipe Organ Stacks. I bought these from Doglips Speed Shop about 2 years ago. They fit all 2bbl carb's with the 2-5/8" diameter airhorn. They are in like new condition and I only ran them for about 4-5 months. They have been sitting on my bench since and they could use a light polishing. The short stack is 5.5 inches. The medium is 9 inches. The tall is 12.5 inches. I am including 3 "bug screen filters" with the stacks. I am asking $200 for the set of three with the bug screens, plus shipping... Or best reasonable offer. Dave 774-327-0178