Cylinder head DOPPLER / DIDIER THOMAS G2 (liquid) 40mm for MBK 51 / av10 motobecane

DOPPLER cylinder head G2 / DIDIER THOMAS, tapered firebox 40mm, specific model for the thermal group competition G2 DIDIER THOMAS. You can fit it on the other cylinder if desired, over the head preserves the standard motor mounting. Compression seal groove on the cylinder head, no other groove on the cylinder head.