# SGM Long Tube Header Development - 30whp Gain!

**URL:** <https://forums.speedlife.net/t/sgm-long-tube-header-development-30whp-gain/119810>\
**Category:** Vendor Marketplace\
**Created:** [November 11, 2008, 4:24pm UTC](https://forums.speedlife.net/t/sgm-long-tube-header-development-30whp-gain/119810 "2008-11-11T16:24:45Z")\
**Posts on this page:** 1\
**Showing post:** 34

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**Author:** ![Happy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/happy240sx/32/5515_2.png) [@Happy240sx](https://forums.speedlife.net/u/Happy240sx)\
**Post date:** [November 29, 2008, 8:45am UTC](https://forums.speedlife.net/t/sgm-long-tube-header-development-30whp-gain/119810/34 "2008-11-29T08:45:35Z")

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> [@Anyone work for Tmobile](https://forums.speedlife.net/t/anyone-work-for-tmobile/19291/15):
>
> What Gear did you do these dyno runs in?

5th Gear of a 6 speed box. Testing was done on my dynapack…so gearing is a non factor as every gear would result in exactly the same power

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