It is certified to ANSI/NSF Standard 61 for use in potable water systems
Works with EGR for 1972-79 440 V8s with OEM 4-bbl
Each manifold is precision fixtured and welded for a perfect fit and maximum structural integrity
and includes connectors for hooking to an HEI distributor
Balancing InstrumentSince 1938
Schoenfeld SB Chevy Header Gasket - ASCS SPOTTER-KIT-DR-R1 It is certified to ANSI/NSFFlange Thickness is 1 4". 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 more. Product Description: Exhaust