The Viperflex 1® models are intended for general purpose exhaust
applications, wherein normal alignment would be expected, and are available
with or without liners.  The
Viperflex® team recommends lined connectors for
turbochargers applications and those wherein prolonged life is required.  
This is particularly desirable in areas of limited access.
The Viperflex 2® models are primarily intended for applications wherein
substantial misalignment may occur, or engine foundations that may have
substantial flexibility, particularly in marine propulsion and vehicular
applications.
Our unique socket weld sleeve design affords optimum variations in available
end configurations, allowing the end user to custom fabricate almost any
connector imaginable.  Our connectors may be purchased without any
connections to fully facilitate customer requirements, or for OEM
applications.