Sale View Details Quick view Flowtech Chevrolet Impala Big Block 396/427 Long Tube Ceramic Coated Headers Was: $999.62 Now: $699.44 Flowtech headers are the perfect combination of performance and value. Flowtech long tube headers are precision engineered using mandrel bent tubing, formed collectors and 5/16" flanges with sealing... Was: $999.62 Now: $699.44 View Details Quick view