243Used cylinders with head and exhaust manifold from a 1990 Seadoo GT with the YELLOW 580/587 engine. These 1.00 MM overbore and should be considered cores. One cylinder may be usable with a hone, but plan on re-sleeving these and starting fresh. Domes on the head are pretty worn out. Exhaust manifold looks good. While the pieces are sold as cores, this is a good way to get a lot of pieces for the yellow motor.  I guarantee all our parts to be as described and pictured. 
This should work with: many different seadoosbut...
I can only guarantee it fits the year and model listed above. Please check with your local dealer, or an online microfiche (Seadoo Microfiche, click on "polaris" tab) to see if this part will work for you!
Be sure to ask questions before bidding...I'm happy to provide more pics if necessary. 
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