# BigRed & SmokinSS whos dicks bigger thread and drew really has an LS6

**URL:** <https://forums.speedlife.net/t/bigred-smokinss-whos-dicks-bigger-thread-and-drew-really-has-an-ls6/247910>\
**Category:** Shift518 Off Topic\
**Created:** [October 25, 2009, 4:27pm UTC](https://forums.speedlife.net/t/bigred-smokinss-whos-dicks-bigger-thread-and-drew-really-has-an-ls6/247910 "2009-10-25T16:27:05Z")\
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**Author:** ![SSmokinn\_SS](https://avatars.discourse-cdn.com/v4/letter/s/ec9cab/32.png) [@SSmokinn\_SS](https://forums.speedlife.net/u/SSmokinn_SS)\
**Post date:** [October 28, 2009, 12:06pm UTC](https://forums.speedlife.net/t/bigred-smokinss-whos-dicks-bigger-thread-and-drew-really-has-an-ls6/247910/96 "2009-10-28T12:06:01Z")

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> [@NYspeed engagement!](https://forums.speedlife.net/t/nyspeed-engagement/25027/7):
>
> drew do a compression test, i dont know shit about LSx but im sure if a ls1 has 10.1 and the ls6 is 10.5, the psi you are supose to get outta the cylinders is different

The head number casting says it all…no need for a compression test.

they are 241 heads = 10.1.1

243 heads = 10.5.1

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