I want to get some woofers for my 1999 rx 300.Does anyone have instuctions on doing this but keeping the factory stereo. Also if anyone has measurements or brand names they used that would be helpful thank you.

 

it has been done, you need to run rca's. are your speakers stock? something around 200-300 watts rms would be good for factory specs. dont go overboard with two 12's.

JL W3 is good, Alpine Type R or S they also make good amps.

 

JL audio W3 are good if you want nice, clean bass.