heard that someone at SRC got a subaru wrx STi heavily modified super fast especially got the turbo sound and the blow off valve sound all come out frm the $300++ speaker FAKE TURBO AND BLOW OFF VALVE heard it every night at yio chu kang road 1 thing for real the second hand cold air intake but the sound real cool like real turbo vrooomzzz vrromzzz piusss piusss some more got on and off swtich i guess i think its a silver colour WRX STi