Best cat replacement..

akgambler47 · 06-20-2010, 12:22 PM

Just got a barely used Agency Power Exhaust. Havnt put it on yet, but i am wondering what you guys would/have replaced stock cats with? I know on my Evo i had, i had a full turbo back, 3'' all the way back, no resonators, no cats. Thats one pipe though, so im gonna need help being pointed in the right direction with a dual exhaust. Sound and power

Vegitto-kun · 06-20-2010, 01:05 PM

Well the best thing you could get is the FI LTH

but if you are planning to turbo your 370 they are pretty useless

CBRich · 06-20-2010, 01:19 PM

As stated you can go with the Fast Intentions Long Tube Headers which will give you piping right back to the start of your exhaust. If you don't want to replace the headers at this time (looking toward turbo at some point) you can go with the Berk test pipes, ERZ resonated test pipes, or some of the high flow cats from those companies or others.

For maximum flow you want the test pipes but they could cause some undesirable sounds with your exhaust. In that case you could go with the high flow cats and just lose a few horsepower.

Zsteve · 06-20-2010, 02:14 PM

Quote:

Originally Posted by CBRich

As stated you can go with the Fast Intentions Long Tube Headers which will give you piping right back to the start of your exhaust. If you don't want to replace the headers at this time (looking toward turbo at some point) you can go with the Berk test pipes, ERZ resonated test pipes, or some of the high flow cats from those companies or others.

For maximum flow you want the test pipes but they could cause some undesirable sounds with your exhaust. In that case you could go with the high flow cats and just lose a few horsepower.

And arent the Berk HFCs 300 cell? I know the ERZ are 200 cell, so make sure you look into the cell count if you go HFCs.

hfrog355 · 06-21-2010, 12:47 PM

Quote:

Originally Posted by Zsteve

And arent the Berk HFCs 300 cell? I know the ERZ are 200 cell, so make sure you look into the cell count if you go HFCs.

Higher cell count = more restriction = less power?? --> ERZ gains > Berk gains?

Is this true? Not trying to start a war, just wondering what the difference in cell count means in practical terms.

esfourteen · 06-21-2010, 03:18 PM

Quote:

Originally Posted by hfrog355

Higher cell count = more restriction = less power?? --> ERZ gains > Berk gains?

Is this true? Not trying to start a war, just wondering what the difference in cell count means in practical terms.

the difference in gain between test pipes and HFC is maybe 5hp, so you can imagine the difference between cell count wouldn't be very much.

hfrog355 · 06-21-2010, 03:51 PM

Quote:

Originally Posted by esfourteen

the difference in gain between test pipes and HFC is maybe 5hp, so you can imagine the difference between cell count wouldn't be very much.

That's true, I hadn't thought of it like that.

Is there a quality difference between the two? Converters are made of rather pricey materials, right - could the lower cell count for the ERZ be a leading factor in the lower price?

Sibze · 06-21-2010, 04:05 PM

I would get a dog before i got a cat... IMO... lol

hfrog355 · 06-21-2010, 04:38 PM

Quote:

Originally Posted by Sibze

I would get a dob before i got a cat... IMO... lol

You get extra for spelling error.

Sibze · 06-21-2010, 04:40 PM

LOL dob o ya!

Chris@FsP · 06-21-2010, 11:18 PM

We have some Berk's with your name on em!

Zsteve · 06-22-2010, 08:00 PM

Quote:

Originally Posted by esfourteen

the difference in gain between test pipes and HFC is maybe 5hp, so you can imagine the difference between cell count wouldn't be very much.

Well if you want the extra 5 hp by going test pipes, then the people that have to use cats will want to go with the lower cell count for exactly the same reason, more hp even if its only a couple more. Your butt cant even feel the 5 hp but the lesser restriction of test pipes and lower cell count HFCs is also the better throttle response.

Daishi · 06-22-2010, 08:21 PM

if your gonna go HFC definitely go with the Fast Intentions cat. Hands down, they make top quality stuff with extreme attention to detail. I would also highly recommend the Long Tube headers. If you have any questions shoot me a pm I have both the FI exhaust and Fi headers and have dealt with tony a bunch of times. Great guys at FI

esfourteen · 06-23-2010, 12:45 AM

Quote:

Originally Posted by Zsteve

Well if you want the extra 5 hp by going test pipes, then the people that have to use cats will want to go with the lower cell count for exactly the same reason, more hp even if its only a couple more. Your butt cant even feel the 5 hp but the lesser restriction of test pipes and lower cell count HFCs is also the better throttle response.

by all means, I wasn't suggesting otherwise, just that it would be rather small gain if that. I went with test pipes because I planned on getting it tuned (so i wasnt worried about dumping fuel), and they never break

gromano · 07-22-2010, 08:45 PM

I just got FI resonated test pipes.... installing them tomorow...
Going on a cruise the very next day though! (im in australia)
Can anyone tell me if this will be a problem?? Is there a 'run-in' period for test pipes or something i should be doing to let the ECU adapt or not??

Please let me know asap!!!

06-20-2010, 12:22 PM	#1 (permalink)
akgambler47 Base Member Join Date: May 2010 Location: PA Age: 37 Posts: 98 Drives: 2010 Black 370 Rep Power: 15	Best cat replacement.. Just got a barely used Agency Power Exhaust. Havnt put it on yet, but i am wondering what you guys would/have replaced stock cats with? I know on my Evo i had, i had a full turbo back, 3'' all the way back, no resonators, no cats. Thats one pipe though, so im gonna need help being pointed in the right direction with a dual exhaust. Sound and power

06-21-2010, 04:05 PM	#8 (permalink)
Sibze A True Z Fanatic Join Date: May 2009 Location: Ontario, Canada Posts: 16,202 Drives: In your way Rep Power: 63	I would get a dog before i got a cat... IMO... lol Last edited by Sibze; 06-21-2010 at 04:40 PM.

06-22-2010, 08:21 PM	#13 (permalink)
Daishi Track Member Join Date: Jul 2009 Location: NJ Posts: 683 Drives: 09 370z 6Speed Rep Power: 17	if your gonna go HFC definitely go with the Fast Intentions cat. Hands down, they make top quality stuff with extreme attention to detail. I would also highly recommend the Long Tube headers. If you have any questions shoot me a pm I have both the FI exhaust and Fi headers and have dealt with tony a bunch of times. Great guys at FI __________________ Cobb Tuned \| Injen Intakes \| Fast Intentions Long Tube Headers \| Fast Intentions TDX Catback 18" Resonators CF Mufflers \| Tommy Kaira Hebi Bebi Shift Knob \| 19x9.5/19x10.5 Five Axis Design S5:F w/ 245/40/19 - 285/35/19 Hankook Ventus V12's

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06-20-2010, 01:05 PM	#2 (permalink)
Vegitto-kun A True Z Fanatic Join Date: Feb 2010 Location: USA Posts: 2,011 Drives: 09 370Z Rep Power: 262	Well the best thing you could get is the FI LTH but if you are planning to turbo your 370 they are pretty useless

06-20-2010, 01:19 PM	#3 (permalink)
CBRich A True Z Fanatic Join Date: Apr 2009 Location: SC Posts: 2,464 Drives: 370Z Rep Power: 544	As stated you can go with the Fast Intentions Long Tube Headers which will give you piping right back to the start of your exhaust. If you don't want to replace the headers at this time (looking toward turbo at some point) you can go with the Berk test pipes, ERZ resonated test pipes, or some of the high flow cats from those companies or others. For maximum flow you want the test pipes but they could cause some undesirable sounds with your exhaust. In that case you could go with the high flow cats and just lose a few horsepower.

06-21-2010, 04:40 PM	#10 (permalink)
Sibze A True Z Fanatic Join Date: May 2009 Location: Ontario, Canada Posts: 16,202 Drives: In your way Rep Power: 63	LOL dob o ya!

06-21-2010, 11:18 PM	#11 (permalink)
Chris@FsP Enthusiast Member Join Date: Dec 2009 Location: Tulsa, OK Posts: 430 Drives: 2008 350Z TT Rep Power: 369	We have some Berk's with your name on em!

07-22-2010, 08:45 PM	#15 (permalink)
gromano Enthusiast Member Join Date: Jul 2009 Location: Brisbane (South) Posts: 308 Drives: 09 Nissan 370Z- Blue Rep Power: 16	I just got FI resonated test pipes.... installing them tomorow... Going on a cruise the very next day though! (im in australia) Can anyone tell me if this will be a problem?? Is there a 'run-in' period for test pipes or something i should be doing to let the ECU adapt or not?? Please let me know asap!!!