Going to pick one of these up this week, but I'm not sure how to tell which are authentic and which are knockoffs with poor fitment.

I know I'm looking for polyurethane, but I'm still concerned about fitment. Will gladly pay more for quality fit, but don't want to spend an extra $100 for the same exact product.

Here's what I've found so far. Can anyone else point me in the right direction, or confirm which of these are legit? Thanks!

https://www.z1motorsports.com/aero-and-body/centric/kuruma-g35-coupe-front-fascia-p-2334.html

http://www.outcastgarage.com/products/2003-2007-infiniti-g35-coupe-kurumaz-poly-urethane-front-bumper

https://conceptzperformance.com/kuruma-z-authentic-urethane-g-spec-bumper-infiniti-g35-03-07-coupe-v35-e-g35c-k_p_803.php

http://pages.ebay.com/motors/link/?nav=item.view&id=130977681726&alt=web

 

conceptzperformance are the original makers. their's would be authentic for sure. Outcast makes good products too but i dont know if theirs are sourced out or made in house

 

Thanks! Ended up ordering local via Z1 after talking with them and seeing a few pics of the part on their cars/customer cars. Will post pics when received/installed!