657-23503 ST1 Decarbon gasket set, Supersedes Part Number 657-23501. ComPac T24/33 Overall length of the hose

Overall length of the hose is 4 5/8 inches long

Sump gasket Lister Petter

This is the improved head gasket kit

268102 Star Tolerance ring

657-23503 ST1 Decarbon gasket set, Supersedes Part Number 657-23501. ComPac T24/33 Overall length of the hose657 23503 Lister Petter decarbon gasket set, former part number was 657 23501. This set is for a single cylinder ST model engine only. This set gives you the necessary gaskets to properly replace the cylinder head on a ST1 engine after removing the built up carbon. The ST model engine was used on numerous applications including generators, fan units, pumps and air compressors.