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did some home work. 853 and 241 heads flow the same, has same specs, just a different casting. thats it. 241 heads were being phased in late 00 models.
Ls1
808 heads 97-98
853 heads 99-00
241 heads late 00's -02
only way to get better flow is 243 heads (lS6 heads)
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2000 Pewter Trans am, M6, SLP Lid,LS6 intake,Kooks 1 7/8" Long tube header,Classic Chambered Powersticks, hurst,off road X-pipe, Strano springs & Koni's, Monster level 2 clutch, HPtuners wide band tuned and a homemade ram air box sealed off.
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