# OK to bypass a catalytic converter in Minnesota?

**URL:** <https://community.cartalk.com/t/ok-to-bypass-a-catalytic-converter-in-minnesota/118294>\
**Category:** General Discussion\
**Created:** [May 29, 2018, 3:57pm UTC](https://community.cartalk.com/t/ok-to-bypass-a-catalytic-converter-in-minnesota/118294 "2018-05-29T15:57:21Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![john19](https://avatars.discourse-cdn.com/v4/letter/j/8797f3/32.png) [@john19](https://community.cartalk.com/u/john19)\
**Post date:** [May 29, 2018, 3:57pm UTC](https://community.cartalk.com/t/ok-to-bypass-a-catalytic-converter-in-minnesota/118294/1 "2018-05-29T15:57:21Z")

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can you legaly bypass a cat[lytic converter in mn

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**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\
**Post date:** [May 29, 2018, 4:51pm UTC](https://community.cartalk.com/t/ok-to-bypass-a-catalytic-converter-in-minnesota/118294/2 "2018-05-29T16:51:22Z")

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No, if it’s less than 25 years old I think. Why would you? You can get one replaced pretty cheap at a muffler shop.

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**Author:** ![asemaster](https://avatars.discourse-cdn.com/v4/letter/a/5f9b8f/32.png) [@asemaster](https://community.cartalk.com/u/asemaster)\
**Post date:** [May 29, 2018, 5:00pm UTC](https://community.cartalk.com/t/ok-to-bypass-a-catalytic-converter-in-minnesota/118294/3 "2018-05-29T17:00:13Z")

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No. It is not legal to remove a catalyst from a car originally equipped with one. If you have emissions testing you’ll fail.

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**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\
**Post date:** [May 29, 2018, 5:05pm UTC](https://community.cartalk.com/t/ok-to-bypass-a-catalytic-converter-in-minnesota/118294/4 "2018-05-29T17:05:39Z")

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And if your car has an oxygen sensor you’ll mess up the engine operation.

Make/model/year/miles?

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**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\
**Post date:** [May 29, 2018, 8:10pm UTC](https://community.cartalk.com/t/ok-to-bypass-a-catalytic-converter-in-minnesota/118294/5 "2018-05-29T20:10:29Z")

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No but its a federal thing not state.

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**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\
**Post date:** [May 29, 2018, 8:36pm UTC](https://community.cartalk.com/t/ok-to-bypass-a-catalytic-converter-in-minnesota/118294/6 "2018-05-29T20:36:13Z")

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It can be a state thing too.