Invidia Gemini CBE & ERZ HFC Review (with db comparison)

KusoSama · 09-09-2010, 12:06 PM

I've had this installed for 1000 miles now (roughly) and I can say that the noise from the exhaust has calmed significantly but the low-end responsiveness has stayed if not increased over time.

At cruising speeds you barely notice the exhaust has been changed from within the cabin.

At throttle, even slight throttle input, you'll hear the car become more "lively" through the exhaust. I'd comment on WOT but I usually don't stay in gear long enough to listen to this all too often. I know that it does get authoratative in sound at WOT but I don't feel it's obnoxious by any stretch.

On deceleration, near end of decel, there is a slight deep flutter sound it'll make. Kinda reminds me of the turbo flutter sound you get after installing a more open exhaust.

I'm still waiting on my dyno charts to post. They were done with a Mustang Dyno so the numbers are more realistic than a Dynojet.

ERZperformance · 09-24-2010, 05:21 PM

HFC are back in stock PM me for a killer price.

ERZperformance · 09-26-2010, 01:37 AM

ERZ HFC are re branded under CNT Racing

ERZperformance · 10-04-2010, 08:08 PM

ERZ HFC are re branded under CNT Racing

ERZperformance · 04-29-2011, 06:46 PM

We are having a GB on these CNT HFC here is the link

Group buy on CNT Racing catback exhaust , HFC and Test pipe combo

NXTAZEE · 09-29-2010, 01:25 AM

I've recently been thinking about adding HFC's to my Invidia Gemini exhaust. I wonder if the Invidia HFC is a better choice.

ERZperformance · 05-23-2011, 12:52 AM

Quote:

Originally Posted by NXTAZEE

I've recently been thinking about adding HFC's to my Invidia Gemini exhaust. I wonder if the Invidia HFC is a better choice.

Invidia is also a great choice I sell them also.

ERZperformance · 05-20-2011, 12:29 AM

These HFC are back in stock now.

JTTZR · 05-20-2011, 12:59 AM

Quote:

Originally Posted by Nissangeneration

These HFC are back in stock now.

Great!

Could I please ask for a competitive offer - shipped to Sydney, Australia.

edub370 · 05-23-2011, 11:45 AM

question... not to thread jack or anything, but has anyone dyno'd HFC's vs. test pipes?

ANMVQ · 05-23-2011, 12:19 PM

from what I have seen and heard, It was a diff of under 5 WHP for TP's over HFC. OP great write up and work.

HR350zzz · 05-26-2011, 02:29 AM

you guys using these hfc's..are u using an extra extension on the 02 sensor or is the built in extension fine.

omgZ · 05-27-2011, 12:21 AM

Quote:

you guys using these hfc's..are u using an extra extension on the 02 sensor or is the built in extension fine.

I just ordered & installed the CNT hfc from nissangen's groupbuy. There are built in 02 extenders and I have not received a code(only had it on for like 2 days). It definitely makes the exhaust sound a lot deeper and louder, and hiss is VERY minimal. There is sometimes an exhaust burble sound, some people like it, some people dislike it.

HR350zzz · 05-27-2011, 03:10 AM

^thanks im about to order a set from the group buy also..i have a hr 350 but we use the same cats. I already have the invidia gemini should sound pretty similar to the OP's..and good to hear about no cel yet

omgZ · 05-27-2011, 02:37 PM

Quote:

Originally Posted by HR350zzz

^thanks im about to order a set from the group buy also..i have a hr 350 but we use the same cats. I already have the invidia gemini should sound pretty similar to the OP's..and good to hear about no cel yet

wait, you drive a 350z. there are two points for the 02 censor on the hfc, but only one has the extender (the one i used for the 370), not sure if the 350 uses the hole with the extender.

09-24-2010, 05:21 PM	#2 (permalink)
ERZperformance A True Z Fanatic Join Date: May 2009 Location: Hayward Posts: 3,015 Drives: Nissan GTR Rep Power: 23	HFC are back in stock PM me for a killer price. __________________ http://www.cntracing.com http://www.ERZperformance.com 800-363-8599

09-26-2010, 01:37 AM	#3 (permalink)
ERZperformance A True Z Fanatic Join Date: May 2009 Location: Hayward Posts: 3,015 Drives: Nissan GTR Rep Power: 23	ERZ HFC are re branded under CNT Racing __________________ http://www.cntracing.com http://www.ERZperformance.com 800-363-8599 Last edited by ERZperformance; 10-04-2010 at 08:08 PM.

10-04-2010, 08:08 PM	#4 (permalink)
ERZperformance A True Z Fanatic Join Date: May 2009 Location: Hayward Posts: 3,015 Drives: Nissan GTR Rep Power: 23	ERZ HFC are re branded under CNT Racing __________________ http://www.cntracing.com http://www.ERZperformance.com 800-363-8599

04-29-2011, 06:46 PM	#5 (permalink)
ERZperformance A True Z Fanatic Join Date: May 2009 Location: Hayward Posts: 3,015 Drives: Nissan GTR Rep Power: 23	We are having a GB on these CNT HFC here is the link Group buy on CNT Racing catback exhaust , HFC and Test pipe combo __________________ http://www.cntracing.com http://www.ERZperformance.com 800-363-8599

09-29-2010, 01:25 AM	#6 (permalink)
NXTAZEE Track Member Join Date: May 2009 Location: Vancouver Island Posts: 530 Drives: 2010 370Z 7AT Rep Power: 18	I've recently been thinking about adding HFC's to my Invidia Gemini exhaust. I wonder if the Invidia HFC is a better choice. __________________ 2010 Carbon Silver 370Z 7AT charcoal int. sports package \| Clear Bra \| Invidia Gemini CBE \| CF B-Pillars \| CF Fangs \| CF Z emblems \| Swift Springs \| 20mm & 25mm Spacers \| SPC Camber Arms \| Brushed Aluminum shift knob

09-09-2010, 12:06 PM	#1 (permalink)
KusoSama Base Member Join Date: Jul 2010 Location: UP Posts: 127 Drives: 2010 370Z Sport MB Rep Power: 16	I've had this installed for 1000 miles now (roughly) and I can say that the noise from the exhaust has calmed significantly but the low-end responsiveness has stayed if not increased over time. At cruising speeds you barely notice the exhaust has been changed from within the cabin. At throttle, even slight throttle input, you'll hear the car become more "lively" through the exhaust. I'd comment on WOT but I usually don't stay in gear long enough to listen to this all too often. I know that it does get authoratative in sound at WOT but I don't feel it's obnoxious by any stretch. On deceleration, near end of decel, there is a slight deep flutter sound it'll make. Kinda reminds me of the turbo flutter sound you get after installing a more open exhaust. I'm still waiting on my dyno charts to post. They were done with a Mustang Dyno so the numbers are more realistic than a Dynojet.

05-20-2011, 12:29 AM	#8 (permalink)
ERZperformance A True Z Fanatic Join Date: May 2009 Location: Hayward Posts: 3,015 Drives: Nissan GTR Rep Power: 23	These HFC are back in stock now. __________________ http://www.cntracing.com http://www.ERZperformance.com 800-363-8599

05-23-2011, 11:45 AM	#10 (permalink)
edub370 A True Z Fanatic Join Date: May 2011 Location: KCMO Posts: 3,458 Drives: 09 370z S/T 6MT Rep Power: 21	question... not to thread jack or anything, but has anyone dyno'd HFC's vs. test pipes? __________________ 09 370Z ST 6MT//Injen CAI//Greddy CBE//TP//TSW's//Swifts//Stillen lip//Whiteline sways 326whp/268tq

05-23-2011, 12:19 PM	#11 (permalink)
ANMVQ A True Z Fanatic Join Date: Mar 2011 Location: Framingham MA Posts: 2,732 Drives: 2014 Q50 AWD Rep Power: 20	from what I have seen and heard, It was a diff of under 5 WHP for TP's over HFC. OP great write up and work. __________________ 14 Q50 AWD, ARK, ECUTEK (SEB), Takda,

05-26-2011, 02:29 AM	#12 (permalink)
HR350zzz Base Member Join Date: Apr 2011 Location: florida Posts: 9 Drives: 2007 nissan 350z Rep Power: 15	you guys using these hfc's..are u using an extra extension on the 02 sensor or is the built in extension fine.

05-27-2011, 03:10 AM	#14 (permalink)
HR350zzz Base Member Join Date: Apr 2011 Location: florida Posts: 9 Drives: 2007 nissan 350z Rep Power: 15	^thanks im about to order a set from the group buy also..i have a hr 350 but we use the same cats. I already have the invidia gemini should sound pretty similar to the OP's..and good to hear about no cel yet

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