they have a TRD setup there including extractors and exhaust system. My dad is going to get one installed in his new levin and i think it was $650 installed, but ring them for an exact price.. some stuff fluctuates in price a bit.
At least with that you can legitamtley add the TRD badge for the extra 10RWkw of power
I got a 3" setup for my 1JZ cressie done at carline belfield.. i asked them to do exactly what you want and they did exactly that. ive got a hi-flow exhaust that has just a deep groan thats tolerable in cabin. Try getting a quote of them and ask them what they recommend, they seem to know what they are talking about.