Spectre Performance 9741 Black 4" x 3.5" Intake Coupler 701722208254 it is a suitable upgrade

it is a suitable upgrade from Bimetal engine bearings

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Spectre Performance 9741 Black 4" x 3.5" Intake Coupler 701722208254 it is a suitable upgradeBrand Spectre Performance Model SPE 9741 Color Black Connect any 4 inch outside diameter component or air intake tube with a 3 1 2 inch outside diameter Comes complete with 2 Stainless steel worm gear hose clamps Not for turbo charged supercharged engines Available in both red and black PVC Spectre's Intake Coupler Reducer is designed to connect any 4 inch outside diameter component or air intake tube with a 3 1 2 inch outside diameter component or