• The Biplane Forum is a large global active community of biplane builders, owners and pilots. From Pitts to Skybolts, to older barnstormers, all types are welcome. In addition to our active community, our content boasts exhaustive technical information which is often sought after for projects and maintenance. This information has accumulated over the 12+ years the forum has been in existence.

    The Biplane Forum is a private community. Subscriptions are only $29.95/year to gain access to this great community and unmatched source of information not found anywhere else on the web. We are also a great resource for non biplane users, since many GA aircraft are built the same way (fabric and tube construction).

O-290 pistons and rings

Dana LaBounty

Active Member
Apr 3, 2010
Reaction score
Exp.10:1 compression made by Jahns for John Thorp back around '70. These are new, unused and in perfect condition. 4 pistons and moly ring set good for either steel or plated cylinders. If your O-290 needs to be top overhauled these will give you 25hp increase. $895 delivered. (803)795-7760

Dana LaBounty
Ashwood, SC.

Latest posts