I have tried a search for rear lips and rear canards, and tried diffusers cant seem to find to find them!

Im talking about the rear bumper pieces. PS sorry about the pictures they are screen shots from a vimeo video on my iphone.

 

I believe those are C-West rear add ons. But Seibon makes a set too.

http://www.ebay.com/itm/SEIBON-CW-style-carbon-fiber-rear-lip-2003-2005-Nissan-350Z-/151192825346?pt=Motors_Car_Truck_Parts_Accessories&hash=item2333cb6e02&vxp=mtr

 

Holy Crap At that price.

 

Have you checked out the g35 rear splash guards?
https://my350z.com/forum/exterior-an...-on-the-z.html

 

I just look up rear bumper or front bumper skirts. Their usually part of a whole side skirt body kit. Just like Bmurray said; Seibon makes them but as a whole kit too. Different manufacterers do sell them by the peice, just go to look for them.

 

Moved to Exterior & Interior...

 

They are called rear valences I think

 

Those are Top Secret pieces which aren't made anymore. You can modify G35 rear mud guards to work.

 

+1 on g35 splash guards. They look just as good.

 

C-West Rear "Under Fins", Vivid Racing carries them:

http://www.vividracing.com/catalog/b...0eou8squ9rnd87

Some companies also call them "End Caps"

 

theyre the c-west rear add ons
they are pricey though. I got mine off a member here though they dont come up often
you should look into the g35 mud guards you can find them on forums or locally for about $100 maybe even less

 

C-west!

 

plenty of reps and different variations available...
and yes, its " add ons"