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head question
im looking at getting a replacement set of heads for my z to get ported. is there a differance between the 241s and 853s? i have the 241s on my car right now. i dont want to waste my money on 853s and porting them if i can get more power out of ported 241s
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Eric
07 Silverado 1500 5.3
01 Z28 6 speed
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