Schoenfeld Sprint Car Headers - 1-3/4 to 1-7/8" Primary - 3-1/2" Collector - Dart Heads - Small Block Ford 121023 Notes: Block Castings Are Not

Notes: Block Castings Are Not Precise

4-7/8 in ID

The camshaft sprocket is factory machined to accept a Torrington Thrust Bearing which is included

This 230cc cylinder head is ideal for normally aspirated 396-427ci and for a wild 346ci the 230 is a good choice

Schoenfeld Sprint Car Headers - 1-3/4 to 1-7/8" Primary - 3-1/2" Collector - Dart Heads - Small Block Ford 121023 Notes: Block Castings Are NotProduct Description: Headers Sprint 1. 75 to 1. 875 in Primary 3. 5 in Collector Steel Black Paint Dart Heads Small Block Ford Pair 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,