elee

I changed out my exhaust diffuser on my 2010 Winne Journey Express. It was a rusty ugly. I could not find a direct replacement anywhere, so I ordered a stainless 12" turn down tip. After a few thousand miles, the EGR failed and I got the ole' "check engine light". Maybe there is some relevance to the shape and size of the tip (diffuser) and the new EPA exhaust configuration critical to the regeneration system. ?? Anyone have similar experience?