Pipe size?
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Pipe size?
I believe that my 95 F150 with the 300 six has clogged one cat and the other is developing a good leak. I want to replace the y pipe with a walker downpipe and then run back to my muffler. The exhaust shop cut the pipe after the second cat and put what I believe to be 3" pipe in, to match the outlet of the cat? I have heard that the walker downpipe is 2.25"? What should I do? Or is the piping from the 2nd cat smaller than that?
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Are you talking from the second cat back? Also, I know that the truck has air injection for the cat, I can't just cap that off and if I leave it hanging it will give that classic tick/woosh noise. Could I drill and weld a little pipe to fit that and put that in the y pipe?
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From: Prince George, B.C.
Usually the entire system on the 300s are 2" or 2.25" max yes. The only way I can see the second cat having a 3" outlet is if it has already been changed or they made an adaptor. The easy way would be to measure the tailpipe, you could also take a tape and eyeball it to get a rough idea of what size it is between the cats and at the headerpipe.
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Went out and looked, its not 3" thats for sure, as for the air injection, would putting a fitting in the pipe downstream of the O2 sensor take care of the woosh/tick and still keep the air pump working?
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In welding the air injection pipe into the y pipe after the O2 sensor, will this make my exhaust have an odd sound, or will that be lost to the no cats and flo-pro muffler?
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