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Unread 12-26-2012, 12:00 AM   #1
ashland82391
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exhaust question

I have a 93 YJ 2.5. My goal its to get the exhaust quieter because it is pretty loud driving around town and really load on the high way. Right know I only had a single muffler with no cat. I don't want to shell out 150 for a new cat do my question is can I put two mufflers, one right on front of the other, on one exhaust and will it be effectively quieter? Thanks for any info.

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Unread 12-26-2012, 08:52 AM   #2
laybackman
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Quote:
Originally Posted by ashland82391 View Post
I have a 93 YJ 2.5. My goal its to get the exhaust quieter because it is pretty loud driving around town and really load on the high way. Right know I only had a single muffler with no cat. I don't want to shell out 150 for a new cat do my question is can I put two mufflers, one right on front of the other, on one exhaust and will it be effectively quieter? Thanks for any info.
The lack of a cat won't change the noise level very much, since they are not made to keep noise elvels down. Two mufflers will most likely screw up engine performance because of too much back pressure, and would be very long and probably won't fit under your YJ.

What are you running for a muffler now? Just buy a stock generic muffler and replace your current muffler. They are no where near $150.00.
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Unread 12-26-2012, 04:34 PM   #3
ashland82391
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Yeah right now I have a tiny thrush turbo from auto zone, do you think a magna flow will be quieter?

Btw I ended up replacing the old 2.5 with the piston slap. The guy wanted 1200$ to rebuild it and I found a good one for 225$.
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Unread 12-26-2012, 07:21 PM   #4
laybackman
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Quote:
Originally Posted by ashland82391 View Post
Yeah right now I have a tiny thrush turbo from auto zone, do you think a magna flow will be quieter?

Btw I ended up replacing the old 2.5 with the piston slap. The guy wanted 1200$ to rebuild it and I found a good one for 225$.
Almost anything would be quieter than a thrush turbo!
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Unread 12-26-2012, 07:43 PM   #5
ashland82391
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Originally Posted by laybackman View Post

Almost anything would be quieter than a thrush turbo!
Good to know, magna flow will be my next purchase
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Unread 12-27-2012, 08:45 AM   #6
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If money is a problem, why go for the Magnaflow?
Generic mufflers will perform just fine, and quieten things down. Hell, for the price of some of those, your could get a generic high flow cat and a muffler.....
I ran a rig with no cat and just a muffler after a motor swap, and it was pretty loud. After a high flow cat went onto it, the noise level went down considerably. No it isnt a muffler, but a cat can sure act like one when fitted!

Martin
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Unread 12-27-2012, 11:03 AM   #7
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Originally Posted by leftlanetruckin View Post
If money is a problem, why go for the Magnaflow?
Generic mufflers will perform just fine, and quieten things down. Hell, for the price of some of those, your could get a generic high flow cat and a muffler.....
I ran a rig with no cat and just a muffler after a motor swap, and it was pretty loud. After a high flow cat went onto it, the noise level went down considerably. No it isnt a muffler, but a cat can sure act like one when fitted!

Martin
I agree! A generic muffler would adequately keep you engine quiet. I stated earlier that a cat would not make too big a difference keeping the sound down. Actually it will, to some degree, but that is not what it is made for. What a cat does is scrub the exhaist of some bad gasses and with the O2 sensor tell you if you are wasting fuel, hurting your performance and possibly shortening the life of your oil changes and even your engine. Why anyone would remove them for a DD or off road rig makes no sense to me. Usually that information comes from a 'mechanic' that also thinks that carbs are better than FI.
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Unread 12-27-2012, 04:53 PM   #8
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Well when I first bought the Jeep it was hacked up already. The reason I was leaning toward the magna flow is because my thrush turbo is bad now and I can take it back to AutoZone a put the 20 some dollars I paid for that and put it toward the 75$ magna, getting it for 50$. do you guys think I can get a reliable muffler for less then 50$ ?
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Unread 12-27-2012, 06:36 PM   #9
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Yes.
See what the parts store will give you for a store credit and save it.
I can get mufflers from my local muffler shop for under $50 all day long, and a cat for @$75. Worth every penny in my experience.

Martin
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1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.The Cherylkee....
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover 4.6 HSE
2000 4.7 4WD WJ with a rebuilt motor.
4.3/700r4/new frame buildup (YJ)....
http://www.jeepforum.com/forum/showthread.php?t=324622

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Unread 12-27-2012, 06:42 PM   #10
ashland82391
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Quote:
Originally Posted by leftlanetruckin View Post
Yes.
See what the parts store will give you for a store credit and save it.
I can get mufflers from my local muffler shop for under $50 all day long, and a cat for @$75. Worth every penny in my experience.

Martin
Ok thanks, I'll call around tomorrowand see what I can find.
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Unread 01-03-2013, 01:22 PM   #11
seattle_yj
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Yeah, a good local muffler shop should be pretty cheap. Get the stock stuff put back and for gods sake man, PUT THE CAT ON. You don't want to be pegged by state patrol as the rule breaker in town, it's hard to shake.
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