You also could get a hold of Chris Hinson at Extreme Flight as they have the DA 50 set up on a tuned pipe in there 87" Yak.
Phone: 770-887-1794
Business hours: Monday thru Thursday 10:00am - 4:00pm E.S.T.
Friday 10:00am - 2:00pm E.S.T.
Or better yet call or e-mail Dave at Desert Aircraft
Desert Aircraft
1815 S Research Loop
Tucson, AZ 85710
USA
Phone: (520) 722-0607
Fax: (520) 722-5622
Email:
[email protected]
You can look here as well >
http://www.desertaircraft.com/exhaust.html
HTH