Rev9Power Rev9_AC-089; Mild Steel Exhaust Flange(3 Inch); 2 Bolt(Stretch Bolt Pattern) Product Details 2 BOLT EXHAUST / DOWNPIPE FLANGE MADE OF HIGH QUALITY MILD STEEL 3" CIRCLE INNER DIAMETER 8MM THICKNESS STRETCH BOLT HOLES ( center to center 108mm ) END TO END LENGTH ( 108MM / 5.37")