A freind I work with over here has a 50th anniversery vette that on his last vacation put in a set of AFR heads with Manley titanium valves comp cams double beehive springs a larger throttle body and air intake and the car dynoed at 420 some odd HP and he gets over 30 MPG on the freeway!!! My mother in laws 4 banger cobalt only gets about 27.5 for gods sake. Those stas are with AC. Vettes are defenitley not left behind.
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