the manifolds the lengths of the individual manifold inserts may be controlled to adjust the pitch and the number of the transverse tubes the heat exchanger configuration is ideally suited for fabricating low production runs and prototype heat exchangers application_number US 19032798 A description fig1 shows a partially completed assembly of an adjustable pitch heat exchanger 10 of the type disclosed by this invention the heat exchanger 10 has a pair of spatially separated manifolds or headers 12 and 14 interconnected by a plurality of fluid transverse tubes 16 the fluid transfer tubes are attached to the manifolds 12 and 14 by manifold inserts 20 as shall be described hereinafter corrugated fins 18 are inserted between and fused to the fluid transverse tubes 16 to enhance the heat exchange between a fluid flowing in the tubes 16 and an external atmosphere such as air once assembled the manifolds 12 and 14 the tubes 16 fins 18 and inserts 20 are fused to each other to form an integral fluid tight assembly a heat exchanger 10 embodying the assembly shown in fig1 may be used as a radiator oil cooler charge air cooler condenser evaporator or any other type of heat exchange application a first.