Schoenfeld - 1.75 to 1.875 in Primary - 3.5 in Collector - 18 Degree Head - Small Block Chevy (Pair) 3.1171R GM Fullsize Truck 2019-22

GM Fullsize Truck 2019-22

new smaller case

The mounting housing is strong and indexes for a quick connection

1978-1983 Plymouth Sapporo

Schoenfeld - 1.75 to 1.875 in Primary - 3.5 in Collector - 18 Degree Head - Small Block Chevy (Pair) 3.1171R GM Fullsize Truck 2019-22Product Description: Headers 1. 75 to 1. 875 in Primary 3. 5 in Collector Gaskets Hardware Included Steel Black Paint 18 Degree Head 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 product at a