I bought these here on the forums and used them for about 2000 miles, so they have about 7000 miles on them in total. I have decided to get Crawfords since theyre more low key. Just my personal preferance though.
$315 shipped
Here is a link to them (at the bottom of the page, $500 new):
http://www.gruppe-s.com/350z/zex.htm
http://www.gruppe-s.com/350z/zex/Z33Highflow.jpg

And the link to the thread where I bought them:
https://g35driver.com/forums/archived-sales/118707-fs-helix-high-flow-cats.html

 

Bump...
Goin on Ebay if I dont get any offers

 

How about $300 shipped

 

What do you mean low profile?

 

"low key" as in crawfords have a "stock" look to them as opposed to the polished Helix HFC's

 

Big 'ole bump for a mod that you can feel

 

what kind of gain?

 

I felt a pretty nice gain in the top end, and it made my exhause tone a bit deeper and louder

 

How about $295 shipped USPS priority

 

Now accepting offers and trades

 

what is your reason for selling?

 

I originally wanted Crawfords, but got a good deal on these Helix HFCs. A local guy had Crawfords FS so I snatched them up.
Also, I had a bit of a rasp under heavy acceleration in 1st gear with the Helix. I have the same sound with the Crawfords, and after reading alot of threads I think it is my Y pipe.

 

bump to the top

 

Nobody?

 

do u know how much to install this? im on the tight budget so.. $295 + install
might be a little pricey for me.