Here is a link where I got the HFC:
https://g35driver.com/forums/engine-...ml#post6336095

I hope there what he says they are. I would think fellow g35 drivers on here are honest when selling items, but you never know.

 

dude those aren't High-Flow-Cats, those are Resonated Test-Pipes>>> https://g35driver.com/forums/engine-...est-pipes.html

 

that dude lied to you, test-pipes are not catted and will not pass SMOG

 

hope you get your money back

 

I don't know much abt this kind of thing so I think it's my fault, I thought there both the same, but I did want something Resonated, so I believe I got what I wanted, I was going for something that would add power but yet still sound good, I didn't want the stright pipe.
Any idea how much HP this will add if any?

 

It said it in the title, how is that a lie??? Not once did he say he was selling cats. Buyer just bought something he had know idea what it was.

 

I would of got these.

http://www.z1auto.com/prodmore.asp?m...st&prodid=2747

 

that's what he lied about

 

Guys I apologize for the confusion, like I said I'm new to this and I'm still learning.
Just answer this for me, how much HP would I gain with what I got and would I get a deep sound without the rasp?

I did more research on all this for myself and found this list that I understood better:


Stock Cats
Suck

High Flow Cats (HFC's)
Either Ceramic or Metallic Core - You'll want Ceramic, last longer, least prone to core ruptures
Better flow than stock cats, but less than test pipes or headers
50/50 chance of passing sniffer tests
Still retain 'Stock' look for visual tests
Mild HP/TQ gain

(Resonated) Test Pipes
No Cat whatsoever
Will NOT pass sniffer tests
Better flow than Stock/HFCs, but less cleanly than headers or ART pipes
Resonated TPs will have less rasp/drone than Non-Res but performance is unaffected
Moderate HP/TQ gain

Advanced Resonance Test Pipes (ART Pipes)
No Cat whatsoever
Will NOT pass sniffer tests
Improved flow over regular (R)TP's
Slightly nulled rasp, but still noticeable
Slightly more HP/TQ output than regular (R)TP's

Long Tube Headers (LTH's)
Sex
As with (R)TPs and ART Pipes, no cat whatsoever
Smoother flow than all previously mentioned parts
Distinctive sound, slightly higher pitched yet quieter idle
Most Dyno proven gains out of the group.
Hardest Install of the bunch, but looks the best when completed.

 

LTHs and headers in general will only really benefit cam'd DEs, RevUp models will fair better but will still need cams to justify the cost of time and money

 

also stock cats have 2 cores per-side so 4 in total, HFCs flow a lot better than stock

 

Thank you for all the info. I'll remember.

 

SD do you know if the R Test Pipe I got would sound bad? I mean would there be a Rasp?
Right now I have a CAI and I have a Y-back Fuji Exhaust. I might also install headers.
My point of getting the RTP was to get more power but still keep the deep sound without the rasp.

 

rasp will mostly be determined by how all of the piping diameter's match up. you'll need a tune to maximize gains. as for headers, you'll need cams to get make it worth the trouble.

 

SD I just ordered the infiniti g35 hypertech tune. I did read some reviews before getting it. What you think abt it?