# exhaust shop? **URL:** \ **Category:** Shift518 Automotive\ **Created:** [May 13, 2009, 8:35am UTC](https://forums.speedlife.net/t/exhaust-shop/244127 "2009-05-13T08:35:36Z")\ **Posts on this page:** 1\ **Showing post:** 38
**Author:** ![crazybrew609](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/crazybrew609/32/6319_2.png) [@crazybrew609](https://forums.speedlife.net/u/crazybrew609)\ **Post date:** [May 14, 2009, 1:54pm UTC](https://forums.speedlife.net/t/exhaust-shop/244127/38 "2009-05-14T13:54:04Z")
> [@Little video of me on my motor bike!](https://forums.speedlife.net/t/little-video-of-me-on-my-motor-bike/18147/38): > > So what you’re saying is > > 150hp motor should have a 1.5" exhaust > 200hp motor should have a 1.75" exhaust > 400hp motor should have a 3" exhaust > 600hp motor should have a 4" exhaust > 800hp motor should have a 6" exhaust > 1200hp motor should have a drainage culvert for an exhaust > > Thank god there are no other variables that would complicate this spreadsheet! :rofl he’s got an n/a small displacement motor in his car, there are no turbo’s/ superchargers/ nitrous in play. the motor has stock compression/stock cams/ stock tune this is why i said he’s not going to be in the 200 to 300 hp range so there is no reason to go bigger then a 2 1/4. not b/c when you hit 200 hp you need atleast a 2 1/4 but b/c with his setup he’s nowhere near the 200 mark to begin with now as for a size chart, you forgot to add in if the pipes are pie cut or mandrel bent… if it’s pie cut then that totally throws off your table of non-variables --- _[View the full topic](https://forums.speedlife.net/t/exhaust-shop/244127)._