1" to 3/4" Intercooler Floating Tube for 5.2 L Predator GT500 Service part 2 are Included with VMP-SUC036 VMP by PWR '20+ GT500 5.2 L 81 mm Race Intercooler Size reducer/increaser mid length style - 1.835" overall length adapts 1.000" opening on VMP-SUC036 to stock water manifold .870" opening includes O-rings (#117 and #115) .635" minor ID. 2 of these are required when installing a VMP intercooler core VMP-SUC036 on the 2020+ Shelby GT500 5.2 L with the stock water manifold. Not required when using VMP intercooler core and VMP-SUC053 - VMP '20+ GT500 16 an billet high-flow water manifold.