Aeromotive X1 Series Internal Conversion Kit, .188" seat (red), sets the regulator operating range to roughly 35–75 psi for X1 family regulators. Use it to swap internals instead of buying a new regulator when moving between carbureted and EFI pressures or changing boost needs. The X1 platform keeps features like a 1/8" NPT gauge port and a 1:1 boost reference while offering larger -08 AN ports and reduced weight.
Aeromotive X-1 Series Internal Conversion Kit - .188in Seat 35-75psi