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 [KIT TESTA 1° STADIO 97mm]". 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.
Nuvair offers authentic parts and equipment manufactured by Coltri Compressors. Beware of inexpensive aftermarket imitations labeled as "replacement," "OEM equivalent," "compatible," or "alternative," as they are not made by Aerotenica Coltri S.p.a. Due to size, weight, or specific requirements, some Coltri products may not be available for online purchase, and others may have extended lead times. To confirm compatibility with your existing equipment or to ensure the product meets your needs, please contact the Nuvair Sales Team for ordering assistance by email or phone.