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Old 12-16-2017, 12:24 PM   #1
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Default Exhausted ! Time to replace.

Iíve done a search and found some good info but looking to drill down on my project a bit more. Looking to replace the exhaust on my 95 Nissan D21 4 Cyl 2 WD. Looking for more stock but if I could squeeze a little more performance out that would be great. It looks like everything should be replaced.
Should I run 2.25 pipes?
Should I get rid of the Cat ? No testing in my state
I like a quieter muffler, what would you all suggest?
The work will need to be farmed out since I donít have the welding equipment or skills.
Whoís a good supplier for the parts?

Thanks for the advice
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Old 12-16-2017, 01:04 PM   #2
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Personally I would leave it as stock as possible unless your going to beef up your motor. I've taken the cat off my 1993 Toyota 2.4 22re and it used about three times the gas with no noticeable improvement. I put the cat back on the that night.(I commuted 100 miles to work) You could order an OE walker exhaust off eBay that bolts on
from the cat all the way back with no need to weld for just over $100. I believe you will lose power and mileage if you change it from stock. Hope that helps a bit
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Old 12-16-2017, 02:02 PM   #3
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I will tell you that if you want quiet, don't get rid of the cat. I did (mine was rusted), and coupled with a Flowmaster 40 series and side exit, it is LOUD.
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Old 12-16-2017, 07:21 PM   #4
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i built a "test pipe" for the cat on my 89..........ran and sounded so much better I never took it off. I did run the stock muffler and tail pipe.
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Old 12-16-2017, 07:57 PM   #5
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I didn't notice a significant difference when I turned my cat into a resonator. Then again my exhaust is starting to get really old and rusted and was never too quiet to begin with... it's leaking at every flange except for where the downpipe meets the manifold and the muffler is slowly rusting out. I'll fix it when it falls off lol.
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Old 12-16-2017, 08:00 PM   #6
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They run so much better without all the mucky muck in the way of the exhaust.
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Old 12-16-2017, 08:09 PM   #7
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On my 93 I replaced the cat, used a Borla SS muffler and a Dynomax mandrel bent tailpipe, I used band clamps on each side of the muffler and had a local muffler shop weld a piece of pipe (small) to the stock flange rear of the cat. It's not loud at all.
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Old 12-16-2017, 11:03 PM   #8
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i need to change my cat for two reasons...........236xxx miles and the heat shield rattles like a freakin snake.
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Old 12-16-2017, 11:09 PM   #9
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Quote:
Originally Posted by cadillacdude1975 View Post
i need to change my cat for two reasons...........236xxx miles and the heat shield rattles like a freakin snake.
Same with mine,only 119K but aside from all the breaks and rust holes in my exhaust the heat shield is the loudest and has got to go!
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Old 12-17-2017, 02:54 AM   #10
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I ran my former Sentra with a hollowed out cat, the noise it made and the fuel odor was enough for me, I sold the car not soon after.
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