This is my brothers 300C 5.7 hemi.(2007)
So far we have put a K@N cold air intake,a throttle body spacer(spiral design),
A 180 thermostat,A predator performance programmer,and a complete Corsa exhaust including the free flowing cats.(made a big difference)
This car runs very strong and sounds awesome,no drone like most kits.
Has surprised many (fast street cars).