Hey all
Im interested in fitting a performance back box onto my free flow exhaust, i heard it adds like 2-5kw of power? Am i rite in sayin that? Any advice on wat brand i should stick to. Fx1 boxes closed down which is a bumanyways any other brands like hks? Im from south africa by the way. And how much should i spend? I dont really hav a limit i jus want a good one for a good price! Thanks all
JW

Your car and mods are?

Its a uno cento 999cc, At the moment i have a cowley free flow exhaust with a K&N cone filter induction kit made for my car.
JW