Originally Posted by ed7r
I have a Sirio EVO3 S12-T3I non STI motor that needs a new pis/cyl
#S12 041226 tried Trinity & Kyosho But no luck. Would anybody know if
THe STI p/c would fit the non STI verzion. Any info would greatly be appreciated. Thank you
Yep, basically is the same P/S the STi and the plain Evo III, so parts are interchangeable.
If you have some troubles finding parts for your Sirio, maybe you may take a look at Murnan engines (look for the URL on their thread here).