MagnaFlow direct-fit catalytic converters are designed for easy bolt-on installation for the professional installer. These cats feature a ribbed body that minimizes expansion and distortion when the converters heat up.
I purchased this two converters for my SC430 in February , car been operational only starting May and i already have following diagnostic error code: P0430 that point on the failure of both sensors in both of the catalytic inventors. I use only 91 gas so this is faulty parts. It is really bad when this things last only 3 month after i pay over $1600 for two of the converters!