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Nov 16, 2004 | 07:31 PM

slow98Z

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853's

are they beter than stock 98 heads.Got them off Ebay for $100.00.

Nov 16, 2004 | 08:52 PM

PREDATOR-Z

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From: BFE

If so it is meaningless improvements. But they are a good base for porting.

Nov 16, 2004 | 09:11 PM

Timberwolf

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Quote:

Originally Posted by slow98Z

are they beter than stock 98 heads.Got them off Ebay for $100.00.

according the book I have, the 853 was used from 97-00. So you may be replacing 853 heads with 853 heads...only difference being the valve cover bolt pattern

Nov 16, 2004 | 09:16 PM

badpewter-z

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853's are defiently earlier i believe 99-00 just took them off my car
thought 00's had better heads guess not , i never looked at the number till then

Nov 16, 2004 | 10:32 PM

BlueSix

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From: its fucking cold

Some of the '00 cars got the "better" 241 heads.

Nov 17, 2004 | 05:44 PM

davered00ss

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98-99's got 801 heads. Don't know if they flow any different. Bolt patterns are different on 00-02 heads than 98-99 heads.

Nov 17, 2004 | 06:44 PM

DaleMX

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Quote:

Originally Posted by davered00ss

98-99's got 801 heads. Don't know if they flow any different. Bolt patterns are different on 00-02 heads than 98-99 heads.

????????

97 to 98 used the perimeter bolt valve cover and 99 and up used the center bolt valve cover. All the heads are interchangable on the block, just have to have the proper valve covers.

I believe the 243's started around mid 2000.