Why are the two cones of a so called "marine" tuned pipe butted up against each other without a tubular section (belly) in between them like an "airplane" pipe?
What are the advantages and disadvantages of a marine pipe compared to an airplane pipe?
Are marine pipes "peakier" in their setup... narrower tuning band? Or just the opposite?
If they are peakier, do they provide more boost (power) while being peakier?