i didnt know that you could get a penland for the hondas, mike penland went together with HMF to make the penland series pipes for kawasakis because he used to race a kawasaki but maby they do make it for hondas too. i am pretty sure that on hmf's web site that they list the DB's on all there pipes. if you dont want loud i would go with the ecosystem, i heard that they sound good but are good for hunting.
-Aaron
-Aaron