Has anyone tried one of these modules on a 4.2L?
JET Performance Products, Import & Domestic Performance, Performance Kits, Fuel Systems, Transmissions
Came across it and know they have a pretty good reputation...as I have heard it anyway...
Does anyone know if it's worth the $$
Any Noticeable improvements?
JET Performance Products, Import & Domestic Performance, Performance Kits, Fuel Systems, Transmissions
Came across it and know they have a pretty good reputation...as I have heard it anyway...
Does anyone know if it's worth the $$
Any Noticeable improvements?