# spark plugs

**URL:** <https://forums.speedlife.net/t/spark-plugs/108796>\
**Category:** SON240sx Automotive\
**Created:** [August 22, 2007, 9:14am UTC](https://forums.speedlife.net/t/spark-plugs/108796 "2007-08-22T09:14:17Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![John\_sinopoli](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@John\_sinopoli](https://forums.speedlife.net/u/John_sinopoli)\
**Post date:** [August 22, 2007, 9:14am UTC](https://forums.speedlife.net/t/spark-plugs/108796/1 "2007-08-22T09:14:17Z")

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alright i know when my car smells like rotten eggs it means that there is un burnt fuel in my cat burning off and i have been told this is because i am using brand new oem plugs and then i was told that i should use colder plugs then stock… so where can i find a colder plug and what heat range should it be thanks

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**Author:** ![JamesS](https://avatars.discourse-cdn.com/v4/letter/j/87869e/32.png) [@JamesS](https://forums.speedlife.net/u/JamesS)\
**Post date:** [August 22, 2007, 10:36am UTC](https://forums.speedlife.net/t/spark-plugs/108796/2 "2007-08-22T10:36:48Z")

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I highly doubt it is because of your spark plugs. How old is your catalytic converter?

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**Author:** ![John\_sinopoli](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@John\_sinopoli](https://forums.speedlife.net/u/John_sinopoli)\
**Post date:** [August 23, 2007, 3:07pm UTC](https://forums.speedlife.net/t/spark-plugs/108796/3 "2007-08-23T15:07:43Z")

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brand new

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**Author:** ![John\_sinopoli](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@John\_sinopoli](https://forums.speedlife.net/u/John_sinopoli)\
**Post date:** [August 24, 2007, 12:43pm UTC](https://forums.speedlife.net/t/spark-plugs/108796/4 "2007-08-24T12:43:15Z")

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when you do a big intercooler and up the boost you should use colder plugs

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**Author:** ![Souljourner](https://avatars.discourse-cdn.com/v4/letter/s/a88e4f/32.png) [@Souljourner](https://forums.speedlife.net/u/Souljourner)\
**Post date:** [November 20, 2007, 6:37am UTC](https://forums.speedlife.net/t/spark-plugs/108796/5 "2007-11-20T06:37:27Z")

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you can buy PFR7G-11’s from Honda dealership.

It is the plug used by S2k. I am running that right now on my SR20 and it dynoed 214 whp at 8psi

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**Author:** ![D\_Fresh](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/d_fresh/32/5542_2.png) [@D\_Fresh](https://forums.speedlife.net/u/D_Fresh)\
**Post date:** [November 20, 2007, 5:58pm UTC](https://forums.speedlife.net/t/spark-plugs/108796/6 "2007-11-20T17:58:19Z")

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Canadian tire.

Brk7e