Intake Port Flow

Exhaust Port Flow

Cylinder Head Porting Modifications performed by Ned Erkman and Cylinder Head Machining Modifications Performed by Serge Tourikian All Viper Cylinder Head Modifications and Flow Testing conducted at Rolling Thunderz * Exhaust Flow testing conducted with a 1.75 diameter header pipe in accordance to proper flow testing procedures. * All Flow Test Data rounderd to the nearest 5 CFM and accurate to within 3 CFM on our Superflow 600 Flow Bench.