MALOSSI offers you this CNC machined cylinder head for your VESPA T5. The aluminum is of excellent quality allowing better cooling than the original one and therefore increasing performance. With a diameter of 66mm, it can be easily mounted on 165cc kits in Ø65mm. The compression of this cylinder head is 1:11.5 to 12.5. Ideal for increasing the performance of your VESPA engine. This cylinder head model is made to be fitted with an O-ring compared to the original which is made to be fitted with an aluminum seal. The O-ring allows a better long-term seal.