Intake + Exhaust = what hp gains overall?

MJB · 01-13-2013, 08:39 PM

Quote:

Originally Posted by Gibby1113

Ss firehawk: I'm close to getting a good deal on some stillen headers along with the nismo s-tuned exhaust. But I'm hesitant about getting the berk hfc due to the fact that it is gonna make the car a lot louder. That's why I was asking earlier what the difference was between the invidia and berk hfc because I wasn't too sure on which one to go with.

Chris: please let me know how the manifold turns out I am really interested in that mod. Also if you could let me know if there's a difference in the sound of the exhaust.

Thanks to everyone who has responded and helped me out, much appreciated.

It would be pointless to install headers and a nice free flowing exhaust without installing either TP's or HFC's. The OEM cats are the main choke point in our exhaust system.

Gibby1113 · 01-13-2013, 08:46 PM

So which hfc has higher quality between invidia and berk?

chrischhorn · 01-13-2013, 10:00 PM

Quote:

Originally Posted by Gibby1113

So which hfc has higher quality between invidia and berk?

Either is good. I still wouldn't waste my money getting the stillen headers installed but if you really want them on. You definitely won't get a big power boost with the OEM cats on but good gawd, with headers and exhaust it does sound sexy!. Right now until my test pipes come in, I'm running Momentum headers, 350z OEM cats, and CNT exhaust and it sounds AMAZING! Real nice smooth and crisp exhaust sound. ZERO rasp since the OEM cats keep it from rasping but as mentioned, it is a power bottle neck. I'll post a sound clip later of how my exhaust sounds for now. I'm kinda sad it won't sound this smooth after the test pipes come in lol.

Gibby1113 · 01-13-2013, 10:23 PM

Quote:

Originally Posted by chrischhorn

Either is good. I still wouldn't waste my money getting the stillen headers installed but if you really want them on. You definitely won't get a big power boost with the OEM cats on but good gawd, with headers and exhaust it does sound sexy!. Right now until my test pipes come in, I'm running Momentum headers, 350z OEM cats, and CNT exhaust and it sounds AMAZING! Real nice smooth and crisp exhaust sound. ZERO rasp since the OEM cats keep it from rasping but as mentioned, it is a power bottle neck. I'll post a sound clip later of how my exhaust sounds for now. I'm kinda sad it won't sound this smooth after the test pipes come in lol.

I heard a sound clip of a 370 w/ k&ns, stillen ss headers, OEM cats, and nismo cbe and it had a lot of rasp. Not sure if hfc will help the sound or not. Don't know too much about how all that would work together.

chrischhorn · 01-13-2013, 11:30 PM

Quote:

Originally Posted by Gibby1113

I heard a sound clip of a 370 w/ k&ns, stillen ss headers, OEM cats, and nismo cbe and it had a lot of rasp. Not sure if hfc will help the sound or not. Don't know too much about how all that would work together.

Rasp will be 10 times worse with HFC's if the OEM cats cant stop it.

DEpointfive0 · 01-14-2013, 06:30 AM

Quote:

Originally Posted by chrischhorn

Rasp will be 10 times worse with HFC's if the OEM cats cant stop it.

I think they are hearing the headers too...
If the headers aren't wrapped to hell, Stillen headers make a tinny noise

01-13-2013, 08:46 PM	#2 (permalink)
Gibby1113 Enthusiast Member Join Date: Nov 2012 Location: On open empty highways Posts: 366 Drives: 40th anniversary Rep Power: 13	So which hfc has higher quality between invidia and berk? __________________ 40th anniversary #450/1000 \| Takeda Attack CAI \| Ark DTS exhaust \| to be continued...

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