Impulse 31 3/16″ driveshaft upgrade kit PB210K
Impulse 31 upgrade shaft and collet
Proboat shaft is 4mm wire – 3/16″ stub
RCBB shaft is 3/16″ wire – 3/16″ stub so no strut change required
Either remove the teflon liner to accept the larger dia wire or do the job properly with following 3/16″ tube and liner- 514B20, 212B20.