from searching the threads, i only found info on rear diffusers for the coupe. i believe it's 4 pieces for the rear.
how many pieces are on the front diffusers?

i also see that everythingg35 sells only rear diffusers for the sedan? is there a reason why they dont sell front diffusers?

i probably wont notice much difference but i just want them.

thanks,
yun

 

I'm just taking a guess, but you are probably finding it difficult to find the front diffusers for sale because every G35, coupe and sedan, comes from the factory with them installed as standard equipment.

The rear diffusers are only installed on G35s, coupe and sedan, that are equipped with the Aero package (not the dealer-installed body kit). The Aero package includes the rear trunk-mounted spoiler and two under-body diffusers that are located just ahead of the rear suspension.

2004.5 Diamond Graphite/Graphite G35 6MT Sedan
Premium Package • Navigation • Splash guards • 350Z intake duct • Stillen high-flow airbox • Underbody diffusers

 

got it. i will just call everything g35 and order the rears

 

That's what I did. I received my order very quickly. Installation was a breeze once you figure our the proper orientation. I recommend removing the stickers (used for inventory purposes) to reveal arrows that indicate the direction they should be installed. The arrows point towards the front of the car.

2004.5 Diamond Graphite/Graphite G35 6MT Sedan
Premium Package • Navigation • Splash guards • 350Z intake duct • Stillen high-flow airbox • Underbody diffusers