Schoenfeld Angle Back Design IMCA Modified Headers - 1-3/4" Tube Diameter - 3-1/2" Collector Diameter, 8" Collector Length - Standard SB Chevy YA0653 Ultra 47 Shield is the

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Schoenfeld Angle Back Design IMCA Modified Headers - 1-3/4" Tube Diameter - 3-1/2" Collector Diameter, 8" Collector Length - Standard SB Chevy YA0653 Ultra 47 Shield is theIMCA Modified Headers fits D&M, Dirt Works, Swartz and Etc. Started in 1974, Schoenfeld is known for custom fabricated headers for all forms of circle track racing. Schoenfeld Headers is the worlds largest manufacturer of circle track headers, but they specialize in a variety of high quality exhaust parts, including turn downs, extensions, tubing bends and elbows, race mufflers, insert mufflers, mandrel bends, exhaust reducers, header gaskets, and