xieds with sepro

[arnie]

What would be the pluses or minuses of using both items? Thanks

 

[msocko3]

The xieds alter the voltage from the O2 sensors to the ecm, if you have the SEPST already you have the means to tune it correctly and do much more than the xieds. Putting them together would not be a good thing.

 

[arnie]

I don't know the technicals on this stuff.Thanks for reply