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Old 08-12-2011, 01:41 PM
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catalytic converter

What's up y'all. Here's my big question. I have a 95 wrangler with the over powered 2.5 4 cyl does anyone know if there is much power gained by removing the catalytic converter and does cause any problems if removed. Im sure there has been discussion on this in the past but I couldn't find anything. Thanks for any info.
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Old 08-14-2011, 10:10 AM   #2
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I know guys that removed it and said it was fine, But its there for a reasone the motor runs better with it. Mine is cloged was going to remove it and go with a strait pipe, But I going to put a new one in helps with mpg good luck.

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Old 08-14-2011, 10:35 AM   #3
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You can pick up a magnaflow high flow cat off of It bolts directly on. All you need to do is buy a new gasket for were the cat bolts up to the down pile and 4 new bolts to bolt the cat on. And if you really want a good flowing exhaust with a sweet sound, buy a flowmaster 44 and a new tail pipe from napa auto parts for 35$ this is what I have and I love it. It really pushes out a lot more air now, and with my high flow intake, my engine is breathing better than it ever has before
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Old 08-14-2011, 10:35 AM   #4
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I kno people who have done it and say they gain hp and get better mpg. It should improve because cats are restrictive to air flow and there there to meet with clean air standards. You just have to watch out when you go get your car inspected. Alot of people but a stight pipe in. Ive been debating putting one in. Its a sunday job
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Old 08-14-2011, 11:09 AM   #5
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Depending on the state you're in pre OBDII vechicles ('95 and older) have a different inspection procedure. In NY we plug into the computer on '96 and newer vehicles, and a missing cat will certainly set a code and the vehicle will fail. We used to dyno test (or idle test 4x4s) on pre-OBDII with the gas analyzer but for some reason NY has decided to relax the testing, now it's just a visual check for emissions devices. If the cat is visibly removed, it would fail.

As far as performance, you will probably not notice any difference. The benefit is exponential... the higher performance the engine, the more you'll gain from opening up the exhaust. On a stock 2.5... maybe something minutely measurable but not very noticeable.
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Old 08-14-2011, 11:54 AM
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Thanks everyone this helps. One good thing about ga is they don't do inspections. And onroad you know the 2.5 is a high performance engine lol. Thanks guys.
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Old 08-16-2011, 08:33 AM   #7
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A buddy set a field on fire with a stopped up cat.

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