Guys,
Their are tons of links on this subject but I have to say the 4080 single 10" sub enclosure is perfect for the G35 Coupe - http://www.4080enclosures.com/
I have a single JL Audio 10W0 dual 4 vc powered by a JL 1300 (300 watt mono sub am) and it HAMMERS!! The JL amp has balanced inputs so it can take a direct input from the BOSE system (use the input not output to avoid the bogus eq from the BOSE), install the bass boost in the center console of the G and i promise it will slam!! The boys at 4080 are amazing. They are made by hand and allow full functionality of the trunk. This was a PERFECT set up and almost takes my rear view mirror with GODSMACK at 24 on the volume ****!!



Here is a great link to another install too - https://g35driver.com/forums/audio-v...g35-coupe.html

 

If you think the 10W0 is good at 300w, you should feel the 10w6 at 500w.