# Gutting a catalytic converter

**URL:** <https://forums.speedlife.net/t/gutting-a-catalytic-converter/50599>\
**Category:** NYSpeed Automotive\
**Created:** [June 25, 2008, 2:57pm UTC](https://forums.speedlife.net/t/gutting-a-catalytic-converter/50599 "2008-06-25T14:57:13Z")\
**Posts on this page:** 5\
**Page:** 3

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**Author:** ![greenbull](https://avatars.discourse-cdn.com/v4/letter/g/bc8723/32.png) [@greenbull](https://forums.speedlife.net/u/greenbull)\
**Post date:** [June 26, 2008, 8:26am UTC](https://forums.speedlife.net/t/gutting-a-catalytic-converter/50599/41 "2008-06-26T08:26:19Z")

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> [@Paulo](#):
>
> Wait, I’m having a hard time understanding your argument.

> [@Paulo](#):
>
> Ok definitely do not do this then.
> 
> **The CAT plays a smaller role in the exhaust note** than most people think. It’s actually very minimal. However if you do remove it, it will only make things raspier.

> [@greenbull](#):
>
> Idk paulo, **my exhaust has a deeper tone and is a bit louder now that**  **i went to a 3inch highflow with the stock catback/muffler**. Raspy when you get on it after you first start it up but once it warms up its sounds good.
> 
> I feel that even with just a resonator instead of the stock muffler the exhaust will still sound raspy.

☹

i should have deleted some of your post the first time.

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**Author:** ![MaximaSE98](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/maximase98/32/7600_2.png) [@MaximaSE98](https://forums.speedlife.net/u/MaximaSE98)\
**Post date:** [June 26, 2008, 8:30am UTC](https://forums.speedlife.net/t/gutting-a-catalytic-converter/50599/42 "2008-06-26T08:30:23Z")

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but u added a hi-flow not totally remove it…if he just guts it it will get worse

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**Author:** ![Paulo](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/paulo/32/7328_2.png) [@Paulo](https://forums.speedlife.net/u/Paulo)\
**Post date:** [June 26, 2008, 8:32am UTC](https://forums.speedlife.net/t/gutting-a-catalytic-converter/50599/43 "2008-06-26T08:32:09Z")

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aaahhh, you just said “3inch highflow” and didn’t add catylitic converter to the end of it lol.

I understand it makes a difference, but not to any degree that a good muffler/exhaust combo will.

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**Author:** ![MaximaSE98](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/maximase98/32/7600_2.png) [@MaximaSE98](https://forums.speedlife.net/u/MaximaSE98)\
**Post date:** [June 26, 2008, 8:37am UTC](https://forums.speedlife.net/t/gutting-a-catalytic-converter/50599/44 "2008-06-26T08:37:36Z")

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you would be surprised…but it all does vary from car to car…my setup was 2.25 piping from catless header to tailpipe. no cats in between with a 2.5" dia. 22’ long resonator. I had a terrible terrible rasp. The exhaust and header are same company (Stillen) I added a 2.5" Hi-flow magnaflow spun cat and totally changed my exhaust not a eliminated 90% of the rasp

the cat back helped with rasp that I had with stock catback and header/midpipe no cats

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**Author:** ![IanK](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/iank/32/5016_2.png) [@IanK](https://forums.speedlife.net/u/IanK)\
**Post date:** [June 26, 2008, 8:51am UTC](https://forums.speedlife.net/t/gutting-a-catalytic-converter/50599/45 "2008-06-26T08:51:38Z")

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yeah IDK if where gonna end up gutting it out, the whole problom at this point is the huge POS muffler in the rear, it really almost sounds as though there is a baffle falling out of it (never was this bad) Im thinking just rebuild the axle back and run a glasspack in the stockers place.

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