No such thing as mini turbo.
Want mod car but does not affect FC??? -> you're kidding me right.
Optimal Performance Zone = Remap the ECU
He wants to hear the exhaust sound but want to add sound proof? -> I cannot brain this.
Fire came out from exhaust? -> need to mod the exhaust and put a fire spitting system there. You don't want fire spitting out from the car, trust me..I have been there and it is not good for the engine.

my car over rich that time..so it back fire a bit..

Look at this guys .

In the end of the video , they concluded we only need around 190 HP to win in the mountain pass , the rest of the power are more or less useless .

http://www.youtube.com/watch?v=MGYGSqGz3gM

they are the same ppl. tsuchiya sifu.

port and polish dont make fire. stupid fire dragon equipment from china can do bbq with ur exhaust   

this is backfire