TwinTurbo.NET: Nissan 300ZX forum - Cat Converter Selection Help
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Subject Cat Converter Selection Help
     
Posted by ThisIsSparTTa on October 03, 2012 at 9:10 PM
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Message Hey guys, my 91 TT I just bought has test pipes and no cats, but it lives in Texas now, so I need to pass emissions. I don't feel like messing around with swapping test pipes in and out to pass inspection, I'll just do it legit, do good for environment and take the small performance hit by putting in cats. Right now I have downpipes to 2.5" test pipes to newer 2.5" catback (don't know the brand) that I've been told is legit.

I thought I had this figured out until I visited my Z shop yesteray, who I'm going to have swap out my dead injector. We had talked previously about the cats, and he had recommended just getting a universal fit and having them cut in. I did my research and picked out the Magnaflow 2.5" 53006 (which is what Magnaflow recommends when you go through their site), and I thought that would work [ http://www.magnaflow.com/02catalytic_converters/02product/displayuniversal01.asp?catalogid=32724&universal=53006. ]

However, he recommended I got 2.25" because the way it will pair up with the test pipes for welding without having to "stretch" or "shrink" the ends of the cat, and this "spun" style, because it leaves more room and is easier to work with. This would match up with the Magnaflow 54955 [ http://www.magnaflow.com/02catalytic_converters/02product/displayuniversal.asp?universal=54955 ]

What are your guys opinions between these 2 options? Will the 2.25" work just as well? I'll also listen to other ideas as well.

     
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