# Exhaust system question

**URL:** <https://community.cartalk.com/t/exhaust-system-question/150476>\
**Category:** Maintenance/Repairs\
**Created:** [October 11, 2019, 2:38am UTC](https://community.cartalk.com/t/exhaust-system-question/150476 "2019-10-11T02:38:22Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Thomas\_Corbitt](https://avatars.discourse-cdn.com/v4/letter/t/91b2a8/32.png) [@Thomas\_Corbitt](https://community.cartalk.com/u/Thomas_Corbitt)\
**Post date:** [October 11, 2019, 2:38am UTC](https://community.cartalk.com/t/exhaust-system-question/150476/1 "2019-10-11T02:38:22Z")

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I have a 95 5.7 k1500 and it had no cats when I bought it because the pipe had rusted off now it connects to 3” pipe except for one part by the back tire that is 2” I just wanted to know if that 2” pipe could damage my engine or will it be fine.

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**Author:** ![Scrapyard-John](https://avatars.discourse-cdn.com/v4/letter/s/f6c823/32.png) [@Scrapyard-John](https://community.cartalk.com/u/Scrapyard-John)\
**Post date:** [October 11, 2019, 2:42am UTC](https://community.cartalk.com/t/exhaust-system-question/150476/2 "2019-10-11T02:42:27Z")

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It will be fine, but the exhaust flow will be slightly restricted. You’ll probably never notice the difference, but you might lose horsepower at high rpm’s. Old truck 5.7’s don’t like to be driven at high rpm’s anyway!

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**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\
**Post date:** [October 11, 2019, 3:36am UTC](https://community.cartalk.com/t/exhaust-system-question/150476/3 "2019-10-11T03:36:37Z")

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The smaller pipe probably helps the situation, b/c the engine was designed to expect some cat exhaust restriction.

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<div class="post-metadata">

**Author:** ![Thomas\_Corbitt](https://avatars.discourse-cdn.com/v4/letter/t/91b2a8/32.png) [@Thomas\_Corbitt](https://community.cartalk.com/u/Thomas_Corbitt)\
**Post date:** [October 11, 2019, 3:55pm UTC](https://community.cartalk.com/t/exhaust-system-question/150476/4 "2019-10-11T15:55:26Z")

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Thanks I was worried it may cause damage I appreciate the help.