Coltri 1st Stage 97mm Cylinder Head Kit
Coltri MCH11, MCH13, MCH16, MCH18, MCH21, MCH23, and MCH10-MCH14 CNG first stage 97mm cylinder head kit. Described in Coltri literature as "1°ST Stage Cylinder Head 97mm Kit." Also described incorrectly as an 88mm kit. For additional information on this kit, see page 10 of MCH8-MCH23 Parts List or pages 12 & 14 of MCH10-MCH14 CNG Parts List; both located under the User Manual tab.