When PIAGGIO pushed the Vespa T5, the undisputed regina of the 125cc class, onto the marshalling yard it became clear that we would have to take care of the continued production and supply of suitable SIP T5 cylinder heads for this excellent model ourselves. For this reason and more we are having a properly trained casting die made to ensure their very survival. Their basic layout is dictated by the unique piston design and bore of the T5 cylinders. The compression ratios and squish bands of these cylinder heads are exactly matched to that of the corresponding cylinder for which they are intended. We have cylinder heads available for the original PIAGGIO, the 172cc and the 152cc cylinders with the two for adjusting cylinders also being fitted with ‘O’ ring seals. This added feature makes sense in combination with a performance cylinder. The increase in compression means more grunt in each rpm and a noticeable boost in maximum power. Engines will remain reliable with these cylinder heads fitted and their durability and mileage will not be negatively affected. In combination with our very own SIP Road exhaust (or similar) your T5 will be entirely suitable for long-distance travel suited to extended full throttle operation providing a motorway cruising speed of up to 130km per hour! Conclusion: significantly more power, 100% reliable combustion and increased cylinder mileage. What more could you ask for Aluminum / diameter 56-66mm / long thread / includes ‘O’ ring gasket Aluminium, die cast, long thread spark plug compatible, squish band: 1.2mm, compression ratio: 10.5:1 12.5:1, includes ‘O’ ring. SIP – TIP: Don’t forget to order a suitable candle!