Schoenfeld IMCA-UMP Modified Headers - 1.625 to 1.75 to 1.875 in Primary - 3 in Collector - Small Block Chevy (Pair) Clevite Engine Parts Trinary Switch

Trinary Switch

Adjustable Bass Control

250 in Free Length

95 in Rectangular Port

Schoenfeld IMCA-UMP Modified Headers - 1.625 to 1.75 to 1.875 in Primary - 3 in Collector - Small Block Chevy (Pair) Clevite Engine Parts Trinary SwitchProduct Description: Headers IMCA UMP Modified 1. 625 to 1. 75 to 1. 875 in Primary 3 in Collector Gaskets Hardware Included Steel Black Paint Small Block Chevy Pair Founded in 1974, Schoenfeld Headers is the largest circle track header manufacturer in the world. Schoenfeld Headers is the manufacturer of competition headers, mufflers and exhaust systems. Schoenfeld Headers listen to their customers, understanding your needs and giving you a quality