What maintenance have you done on the motor? It's unlikely the kit as mine is running great with ~7000 miles on it now. I DD in 100+ degree weather with no issues; and still have enough power to spin the 275s up through 2nd gear in the heat...
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CURRENT ll F10 M5 l E85 Z4MR l I01 i3 REX
SOLD ll E70 X5M l E85 Z4MR VF570 l E36/7 Z3MR l E36 328i
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