# Will going down .1" exhaust piping diameter....cause bottlenecking?

**URL:** <https://forums.speedlife.net/t/will-going-down-1-exhaust-piping-diameter-cause-bottlenecking/14495>\
**Category:** NYSpeed Automotive\
**Created:** [July 12, 2006, 9:20pm UTC](https://forums.speedlife.net/t/will-going-down-1-exhaust-piping-diameter-cause-bottlenecking/14495 "2006-07-12T21:20:16Z")\
**Posts on this page:** 1\
**Showing post:** 17

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**Author:** ![Zer0DazE](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/zer0daze/32/7624_2.png) [@Zer0DazE](https://forums.speedlife.net/u/Zer0DazE)\
**Post date:** [July 13, 2006, 5:03am UTC](https://forums.speedlife.net/t/will-going-down-1-exhaust-piping-diameter-cause-bottlenecking/14495/17 "2006-07-13T05:03:04Z")

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> [@blacke36](#):
>
> well…
> 
> (2.5/2 ) \* (2.5/2) \* 3.14 = 4.9ish…  
> (2.36/2) \* (2.36/2) \*3.14 = 4.3ish…
> 
> (4.3/ 4.9) \* 100 = 87%
> 
> so thats 13% less area (providing if you are thinking of air as slices), for exhaust to go through… I am gonna stop there cause I hated Thermo and I Don’t remember all of it
> 
> 3.14 / 4.9 \* 100 = 64%
> 
> difference making the .1 a 1/3 of a big difference

beck, did you not read this post?

13% less area

the WS isnt going to be any mroe quiet that the current far cannon.  
you’re a retard for wanting to go with a smaller exhaust on a turbo car that you want to put a bigger turbo on and turn the boost up more on.  
go 3" and stop being a fucking retard

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