Blowoff Valve
Spring Pressures
Selection Guide

Engine Vacuum Reading     / Color Use Spring

Between:

- 22 and -23 in/Hg     -12 Psi (-24 in/Hg )

- 20 and -21 in/Hg    Pink -11 Psi (-22 in/Hg )

- 16 and -19 in/Hg    Un-painted -10 Psi (-20 in/Hg )

- 12 and -15 in/Hg    White -8 Psi (-16 in/Hg )