balkpark what should I be expecting to pay to have 2 mag hi flo cats welded in replace of the 4 stock cats? what do they do with the o2 sensor since there is no cut out on the mag cats?

 

400-500. i did it on mine but got all new flanges. i basically had them put a new pipe from the manifold to the 2nd o2 sensor. they put a hole for the new o2 sensor on the front and the rear one is stock. my bolts to hold the manifold and y pipe together were rusted out.so was the top of the y pipe the manifold was fine so thats what i had to do. works great, throws no codes. check engine light has not come on at all.