Maximizer Manifold Header 01-04 Corvette C5 LS1 / LS6 / Z06 5.7L Full Length (Stainless) 2001 2002 2003 2004 Corvette C5 LS1 / LS6 / Z06 5.7L Full Length Primary Tube : 1 3/4" OD Collector / Piping : 2 1/2" OD Resonator Body : 4.0" OD Flange Thickness : 3/8" Runner Wall Thickness : 16 Gauge (1.5mm