Yes you can but just treat it as if you were doing a proper advert for sale in the relevant area. Pop it in the "370 General" sub section though for the members to give you their suggestions on price.
Jay you know the rules.
Please take pictures of your wife with your username on a piece of paper next to her, ...then post a proper for sale advert in the relevant sub section, "For Sale" area or maybe the "Swap Shop".
Welcome aboard Matt.
What size tyres and alloys are you running on?
No problems with your battery?
Post a thread in the "350Z Technical" sub section if you can't find any answers by searching.
Luckily there's a guide here which will take you through exactly how to do it.
Link: http://www.350z-uk.com/topic/103472-how-to-add-your-photos-to-the-forum/
Good luck.
Welcome aboard Jules.
With regards to the exhaust system it's all personal taste really depending on what sound you're after and how you want it to look, ...also budget makes a big difference.
Exhausts also rarely sound the same on computers as they do in real life but here are some videos of customer exhaust sounds from one of our traders Tarmac Sportz.
Link: http://www.350z-uk.com/topic/60920-tarmac-sportz-customer-exhaust-videos-thread/
Hopefully Alex will come back with some more info on that for you. I did find these 1.2L and 1.8L bottles from Torqen when I searched.
Link: https://www.torqen.uk/nissan/350z/body-styling/exterior/2804-windshield-washer-bottle-replacement-kit-1040010402.html
The windscreen washer bottle is big enough though to supply both windscreen & headlight washers. I think it might have been Sam Mcgoo who told me about re-routing the pipes to the one bottle after I was complaining that I didn't have a headlight washer bottle anymore after supercharging.
After all both pumps are already on the one bottle anyway.
When mine was fitted I did have the headlight washer bottle completely removed but in hindsight we realised you can either use a smaller bottle as Alex suggest or re-route the pipe work so it pulls the washer fluid from the same bottle as your windscreen washer fluid.