Great looking and perfect fit. Comes with all hardware. Got 15hp gain. NO CEL WITHOUT O2 SENSOR EXTENSIONS.!!! Only negative is no extra bung for wideband O2 sensor. Otherwise great buy quality stuff here.

I was going to buy Berk Resonated test pipes, but once I saw what ISR had to offer, I bought these and Installed them the next day, Sounds Amazing and Don't regret waiting, My g35 Sounds Loud and Throws a couple pops every now and then. XD

Fantastic form factor, and easy installation, comes with literally everything you need for installation (unlike other "cheap" options) They sound fantastic when paired with a Dual exit setup. Cannot speak for CEL as I am tuned, however If you are looking to spice up the daily for next to nothing this is it.

Fitment was not so great on these unfortunately. They’re rubbing on my G35 Coupe’s firewall and cause a bad vibration due to that. Other than that, they made my car louder with minimal drone but rasp is present. I have this paired up with my Nismo S-Tune exhaust and it sounds okay. No check engine light and throttle response feels better, as a bonus.