# 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:** 2\
**Page:** 5

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**Author:** ![jammin1911](https://avatars.discourse-cdn.com/v4/letter/j/a9a28c/32.png) [@jammin1911](https://forums.speedlife.net/u/jammin1911)\
**Post date:** [February 10, 2009, 8:18am UTC](https://forums.speedlife.net/t/sgm-long-tube-header-development-30whp-gain/119810/81 "2009-02-10T08:18:07Z")

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as long as the baseline was done in similar temp it shouldnt make much of a difference really I wouldn’t think…

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**Author:** ![Sasha\_SG](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sasha_sg/32/5477_2.png) [@Sasha\_SG](https://forums.speedlife.net/u/Sasha_SG)\
**Post date:** [February 10, 2009, 12:07pm UTC](https://forums.speedlife.net/t/sgm-long-tube-header-development-30whp-gain/119810/82 "2009-02-10T12:07:50Z")

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haha its ok

the dyno has a full onboard weather station and everything is calibrated to SAE standards

I have dyno’d my car in the summer and in the winter and it has always, always read 299whp. Incredibly consistent.

Is it possible for headers to make this much power? i didn’t think so either, but it truly is reality and not some sort of scam

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