Replacing the Catalytic Converters on my Z32/300zx

My 300zx has had a bad exhaust smell since I bought her.  I can’t believe I didn’t notice when I bought her.  I have the Z running pretty good (not rich/not lean), and have replaced the O2 sensors.  So pretty much the last possibility is that the 23+ year old catalysts have gone bad.  Since I bought this car from a younger kid who had put on a cat-back exhaust, I wouldn’t be surprised if the cats haven’t been gutted.

So I’ve decided to bite the bullet and replace the catalysts.

You can buy “universal catalytic converters” on Ebay for around $60.  For the 300zx, these would need to be wielded in.  Calling a few muffler shops, I got estimates ranging from $150 to $250 to wield the universal cats in.  Since the Z32 has two cats, the total cost would be around $320 to $420 to replace the cats with the universal cats.

Universal Catalytic Converter
Direct Bolt-on Replacement Catalytic Converter for Z32/300zx

Rockauto also carries direct bolt on replacement catalytic converters for the 300zx.  I can install these myself so the only costs would be part costs which were around $175 per cat.  I was able to find a 5% coupon by googling which basically payed the shipping cost.  So for about $350 I will have not only new cats but new downpipes too.  This is the route I’ve decided to go.

categories Exhaust | | datetime September 14, 2013 1:38 pm



2 Comments

  • By mobilabonnementer, February 12, 2014 @ 6:41 am

    Appreciate the recommendation. Let me try it out.

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  1. » Repairing Exhaust Leak on my 300zx — December 24, 2013 @ 3:01 am

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