i made a cheap boy header for my Zetec, stock manifold left in place, but i made a plate to fit to the bottom of it, welded 3" pipe down to 2 1/2" pipe, elimintating the whole cat down to the O2 sensor.
OMG the power that suddenly hopped back into the car. but the NOISE, jesus.. god help my ears!
if anyone wants plans or wants one of these plates made or the whole thing, just ask.
imo, i think the car has a little more power, i'll do a 0-60 with the G-Tech later on, l8r...
BTW the IAT Resistor wasnt the problem , it was not having crap in the cat.
the IAT dropped my times .200 .300 with a 5.6K on it.
