# Camshaft:

**URL:** <https://forums.speedlife.net/t/camshaft/81567>\
**Category:** SON240sx Automotive\
**Created:** [September 7, 2004, 4:49pm UTC](https://forums.speedlife.net/t/camshaft/81567 "2004-09-07T16:49:27Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Jacky\_Ngai](https://avatars.discourse-cdn.com/v4/letter/j/3d9bf3/32.png) [@Jacky\_Ngai](https://forums.speedlife.net/u/Jacky_Ngai)\
**Post date:** [September 7, 2004, 4:49pm UTC](https://forums.speedlife.net/t/camshaft/81567/1 "2004-09-07T16:49:27Z")

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i’m going to order a camshaft for my s13 sr blacktop. but i don’t know what Duration should i buy for intake and exhaust. ex: 256, 264 and 272. Any idea? thanks