Emory Schroeter has the answer to this one. What header and muffler did you use on the S.T. 1.40? Got to reduce the noise (105dB(A) on my practice plane. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.f3a.us/pipermail/nsrca-discussion/attachments/20030218/942bfc30/attachment.html