I don't understand how the Varex can work on the g3/g4 platforms. Won't the system cause exhaust gas restrictions when closed for stealth mode?
My Betty's afr's went fucktard after Racetorque put a different muffler with a new pipe configuration.
Ie: it was tuned with a straight pipe(no muffler) then we swapped it to a muffler with two 90 degree bends in it. Two weeks later the
ecu was a sped and it had to be completely retuned to the new muffler.
No major issues after that.