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I know that there has been talk on here before about no power gains in cat. convertor removal but being the previous owner of 2 maximas a 1999 and a 2002, there was like 15/20 hrsp to be had by removing the precats. I did a little surfing and come up with this
http://www.courtesyparts.com/betasi...08-catalyst-converter/-c-714_715_736_738.html
http://www.courtesyparts.com/betasi...08-catalyst-converter/-c-533_534_645_647.html
They look pretty identical to me and even the part numbers all most match up. I wonder if the test pipes made for the 350z will fit on our fronty/xterras? Since there are hardly any aftermarket performance parts out there for ours, since were not so popular yet. Anyone have a take on this??
 

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I have 4 cats on mine.. and im pretty sure everyone else does too. the front 2 are being used as they are monitored, the rear 2 serve no purpose. my plans this summer are to remove the rear 2 and resonator at the rear also and give my X a little deeper sound...

I talked to a few Nissan MDTs (Master Diagnostic Technicians) and they said the rear 2 cats serve no purpose other than quiet the sound (kind of like a resonator)... but when I removed the rear part of the exhaust to do the Y-pipe mod i noticed that it has the honeycomb crap inside of it. So yep... thats one of my many plans this summer is to remove the rears and weld in a pipe........

I wouldn't put test pipes on my X, or even take the actual cats off because I don't race my truck. and i dont make enough horsepower to see any reason to have a straight exhaust. thats just my 2 cents.. and experience from building a few track cars...

remember.. Just because its loud doesn't mean its fast. But if its fast, its gonna be loud!
 
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