sometime in the near future, I need to install a new y-pipe with cats on my D90. I'll either do that or cut the cats off completely. Curious to those who have done it yourself, is it a complete pain in the ass to DIY this? I'm good with a wrench, but nothing frustrates me more than getting half way into something, only to have spent 3 days on some bolt that I couldn't move and needs to be plasma cut off, and so now I'm looking at a tow. So curious if this is something that's a no brainer as a DIY or just pay the shop and be done with it.
You have to at least anticipate breaking a down pipe stud... Not a huge deal if your used to that sort of thing but if your not then take it to a muffler shop and have them do it.
Stephen, If you're good with a wrench, dropping the y-pipe isnt that hard.
One or three studs may come out of the exhaust manifold---I've yet to have one break off.
The bottom flange bolts might have to be cut but you have better access down there.
Once the Y is off, you can cut a 3 sided *door* in the top of the cats to "clean and inspect" them.
Then, just bend it back down and weld it up and done.
yeah, I was thinking about just dropping it and 'inspecting it' and reinstalling it. I dont have a welder though, though the cost would be cheaper than a new pipe and I have other crap I need to weld. If I register locally I have to be able to pass emissions. I could leave the D90 at my farm in South Carolina though and just register it there with no emissions testing.
I went with a magma flow y pipe... it all came off ok as well... so was easy
Or give them the part/part # and have them do it..
In ca I'd think it was too much of a pita to go catless
Imho
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