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Generation III Internal Engine 1997-2006 LS1 | LS6
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which heads

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Old 12-15-2011, 10:03 PM
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Default which heads
curious on which heads i have. the 241? or 803(or whatever it is)

i have 1999 TA A4 not a WS6

is only way to find this out to get my casting numbers n look by those?
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Old 12-15-2011, 10:43 PM
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There will be a casting number on the cylinder head that will tell you for sure. My guess is you have a set of 853 casting cylinder heads being that your car is a 99.
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Old 12-16-2011, 03:57 PM
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Originally Posted by Aaron@Texas-Speed
There will be a casting number on the cylinder head that will tell you for sure. My guess is you have a set of 853 casting cylinder heads being that your car is a 99.
hmm yeap they are the 853. Im used to old SBC not these LS1 so are they **** heads? I know they arent as good as aftermarket(obviously) but how much better are the 241? would they be worth the effort for a budget upgrade?
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Old 12-16-2011, 04:47 PM
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Originally Posted by Fst_Byrd
hmm yeap they are the 853. Im used to old SBC not these LS1 so are they **** heads? I know they arent as good as aftermarket(obviously) but how much better are the 241? would they be worth the effort for a budget upgrade?
A good budget upgrade would be the 243's...
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Old 12-16-2011, 05:04 PM
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Tsp has a big head selection i heard the 227cc heads are the most expensive but make great power.
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Old 12-16-2011, 11:05 PM
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Originally Posted by IRONFIST
A good budget upgrade would be the 243's...
243 those are off the LS2 right? On average whats your opinion of power added from the swap?
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Old 12-16-2011, 11:48 PM
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Originally Posted by Fst_Byrd
243 those are off the LS2 right? On average whats your opinion of power added from the swap?
Guys on here are pushing stock 243s to about 420 horses to the wheels. Im making 387 to the wheels with them.

All depends on your other mods....
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Old 12-17-2011, 08:59 AM
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Originally Posted by Fst_Byrd
hmm yeap they are the 853. Im used to old SBC not these LS1 so are they **** heads? I know they arent as good as aftermarket(obviously) but how much better are the 241? would they be worth the effort for a budget upgrade?
The only difference from 853's is they a cast differently. Same ports...

243's in stock form are worth 15 or so over any LS1 head...
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Old 12-18-2011, 10:36 AM
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you can get 241s heads for $100,243s for $400.check the valve seats for leaks .I would get the 243s if you can ,with the right cam you can make 425+rwhp.
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