Just so you know the only difference between 5.3 heads and LS1 heads is the combustion chamber (The LS1 being larger) so you'll gain more from milling the truck heads.
Just so you know the only difference between 5.3 heads and LS1 heads is the combustion chamber (The LS1 being larger) so you'll gain more from milling the truck heads.
2006 SilveradoLittle Black Bitch
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