Casa Performance Radiale finned cylinder head for SS200, central sparkplug hole, for Lambretta S1 + S2 + S3 + TV3 + Special + SX + Serveta 125/150 & 175cc models). This is the RACING version that has a CENTRAL sparkplug hole. The idea for this new head has been concieved, designed, tested and manufactured by us here at RLC for the Casa Performance range. This DRASTICALLY reduces the running temperature of the SS225 kit and provides mental cooling and therefore your scooter runs MUCH better. These are 'plug n' play' and are a straight swop for the standard red coloured CNC'd heads supplied as standard with the SS200 kits. As the spark plug is central on this head, the cylinder head cowling will require drilling to allow fitment of the sparkplug.