I'm unfortunately going to be replacing all 3 catalytic converters on mine real soon as well as the COP's (again).
I'm curious to know if anyone has done a cooling modification by routing a duct from the grille to blow cooler air under the intak manifold to reduce the temperatures the COPS are exposed to. The failed ones I have look like they overheated and expanded internally cracking the plastic allowing moisture to enter causing misfires.
Since my most recent failure never threw a code or lit the CEL but took out the converters, I would like to do whatever I can to prevent the COP's from failing.

In adition, is there any suggested converters preferred by the FTE members or manufacturers to avoid?

TIA
Joe

 

On my 01 I had 1 front and 1 back go replaced 1 from napa and 1 from advanced auto. Other 4 where original. 13yrs,195,000 miles.