About to order HKS header & front pipe. To go cat or no cat? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

BenArmstrong · 04-11-2013, 06:41 AM

Hey guys,
Basically what the title says, I'm ready to order some more HKS exhaust to go with the catback I already have.
They have a header & front pipe combo. Their front pipe gets rid of the second cat, but they have a choice of two headers, one with and one without cat.
I know that you get more power without the cat and I'm not that worried about getting exhaust tested by 'you know who' but I am worried about the check engine light staying on all of the time. Is there any way of getting rid of the CEL? I do have ProECU tools if that helps?
Or is the gains between with and without primary cat not really worth it for the CEL trouble?

Cheers

Bg8780 · 04-11-2013, 09:35 AM

From what I've read the difference in power is negligible between catted headers and non-catted. (Could be wrong though) The catted headers would be quieter but it depends what you're going for. If you do have a CEL the Ecutek software can clear that.

swift996 · 04-11-2013, 09:45 AM

There is a post on here with a video from HKS showing the differences and the sounds..pretty good.

People have found some solutions to the CEL. I ordered a catted version (of the FA20Club) header. It's less raspy and you don't get any unwanted smells seeping up through the floor board.

No cat will be louder but bring a little more power. For me I can give up 2whp for something a little quiter.

frslee · 04-11-2013, 10:52 AM

I believe High flow cat and non-cat's difference is just 2-3 whp.

Not sure how the non-cat works on these cars. I came from Audi and I used the high flow cat. People run o2 spacer (HFC or TESTPIPE) so the sensor gets correct measurement. It also eliminated CEL.

jon_0_3 · 04-11-2013, 10:57 AM

Like others have stated I would give up a little power for a quieter ride. Also if someone finds that video please post it

Huehuecoyotl · 04-11-2013, 11:05 AM

Have not tried it but hear uncatted can get LOUD

shu5892001 · 04-11-2013, 11:20 AM

I would buy a front pipe with a hfc and run catless header, instead of the other way around.

BenArmstrong · 04-11-2013, 05:18 PM

Cheers guys. I would love to see that video if anyone finds it but yeah, I think I'll go with catted. If the difference is only 2-3hp it doesn't seem worth it.

Thanks guys!

swift996 · 04-11-2013, 07:01 PM

Quote:

Originally Posted by BenArmstrong

Cheers guys. I would love to see that video if anyone finds it but yeah, I think I'll go with catted. If the difference is only 2-3hp it doesn't seem worth it.

Thanks guys!

Here it is, should give you an idea:
[ame="http://www.youtube.com/watch?v=CN-CeHGYLzE"]TOYOTA 86/SUBARU BRZ HKS SUPER MANIFOLD with CATALYZER GT-SPEC - YouTube[/ame]

86pro · 04-11-2013, 10:18 PM

Im selling my header which is brand new but im in canada. I got the uncatted one. selling mine for less.

Mike86 · 04-12-2013, 08:48 PM

^ how much and wherew are you in canada and which header

86pro · 04-13-2013, 12:27 AM

toronto and the hks no cat header. its in canada classifies. pm an offer

jng · 06-20-2014, 02:34 AM

Does anyone have the HKS EL header + resonated front pipe combo (both un-catted) installed? Does the lack of cat for both cause black soot build up at the bumper / exhaust tips for NA car running without a tune?

Any comparative thoughts on the HKS resonated front pipe (catless) vs. stock front pipe?

Thanks.

jng · 06-23-2014, 01:58 PM

Anyone? Have to make the decision tomm. Leaning more towards staying with stock front pipe for now. Thanks.

04-11-2013, 06:41 AM	#1
BenArmstrong Member Join Date: Jul 2012 Drives: White GTS, Vortech, Aero kit Location: Australia Posts: 69 Thanks: 60 Thanked 159 Times in 21 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	About to order HKS header & front pipe. To go cat or no cat? Hey guys, Basically what the title says, I'm ready to order some more HKS exhaust to go with the catback I already have. They have a header & front pipe combo. Their front pipe gets rid of the second cat, but they have a choice of two headers, one with and one without cat. I know that you get more power without the cat and I'm not that worried about getting exhaust tested by 'you know who' but I am worried about the check engine light staying on all of the time. Is there any way of getting rid of the CEL? I do have ProECU tools if that helps? Or is the gains between with and without primary cat not really worth it for the CEL trouble? Cheers __________________ Build thread here: http://www.ft86club.com/forums/showthread.php?t=30502

04-11-2013, 09:45 AM	#3
swift996 Senior Member Join Date: Nov 2011 Drives: Subaru BRZ Limited 6MT Location: Winston-Salem, NC Posts: 2,432 Thanks: 712 Thanked 955 Times in 545 Posts Mentioned: 47 Post(s) Tagged: 0 Thread(s)	There is a post on here with a video from HKS showing the differences and the sounds..pretty good. People have found some solutions to the CEL. I ordered a catted version (of the FA20Club) header. It's less raspy and you don't get any unwanted smells seeping up through the floor board. No cat will be louder but bring a little more power. For me I can give up 2whp for something a little quiter. __________________ Innovate Supercharged Black Limited BRZ 6-Speed MT(Build Thread) 2010 Cadillac CTS-V Sedan M6 w/550whp (Build Thread)

04-11-2013, 05:18 PM	#8
BenArmstrong Member Join Date: Jul 2012 Drives: White GTS, Vortech, Aero kit Location: Australia Posts: 69 Thanks: 60 Thanked 159 Times in 21 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Cheers guys. I would love to see that video if anyone finds it but yeah, I think I'll go with catted. If the difference is only 2-3hp it doesn't seem worth it. Thanks guys! __________________ Build thread here: http://www.ft86club.com/forums/showthread.php?t=30502

06-20-2014, 02:34 AM	#13
jng Member Join Date: Apr 2014 Drives: Toyota 86 Location: Singapore Posts: 51 Thanks: 19 Thanked 28 Times in 11 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Does anyone have the HKS EL header + resonated front pipe combo (both un-catted) installed? Does the lack of cat for both cause black soot build up at the bumper / exhaust tips for NA car running without a tune? Any comparative thoughts on the HKS resonated front pipe (catless) vs. stock front pipe? Thanks. __________________

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04-11-2013, 09:35 AM	#2
Bg8780 Senior Member Join Date: Jun 2012 Drives: '13 Black Subaru BRZ Limited Location: All over Posts: 479 Thanks: 439 Thanked 156 Times in 96 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	From what I've read the difference in power is negligible between catted headers and non-catted. (Could be wrong though) The catted headers would be quieter but it depends what you're going for. If you do have a CEL the Ecutek software can clear that.

04-11-2013, 10:52 AM	#4
frslee Just drive it Join Date: Mar 2013 Drives: 13' FR-S Location: Maryland Posts: 1,122 Thanks: 97 Thanked 321 Times in 218 Posts Mentioned: 10 Post(s) Tagged: 3 Thread(s)	I believe High flow cat and non-cat's difference is just 2-3 whp. Not sure how the non-cat works on these cars. I came from Audi and I used the high flow cat. People run o2 spacer (HFC or TESTPIPE) so the sensor gets correct measurement. It also eliminated CEL.

04-11-2013, 10:57 AM	#5
jon_0_3 Junior Member Join Date: Apr 2013 Drives: BRZ Location: United States Posts: 9 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Like others have stated I would give up a little power for a quieter ride. Also if someone finds that video please post it

04-11-2013, 11:20 AM	#7
shu5892001 Ontario's FT86 Join Date: Aug 2012 Drives: 2016 Lexus GS-F Location: Toronto Posts: 685 Thanks: 261 Thanked 165 Times in 111 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	I would buy a front pipe with a hfc and run catless header, instead of the other way around.

04-11-2013, 10:18 PM	#10
86pro Senior Member Join Date: Sep 2012 Drives: frs Location: tdot Posts: 149 Thanks: 13 Thanked 22 Times in 19 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Im selling my header which is brand new but im in canada. I got the uncatted one. selling mine for less.

04-12-2013, 08:48 PM	#11
Mike86 Senior Member Join Date: Nov 2012 Drives: Scion frs Location: Montreal Posts: 105 Thanks: 253 Thanked 13 Times in 13 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	^ how much and wherew are you in canada and which header

04-13-2013, 12:27 AM	#12
86pro Senior Member Join Date: Sep 2012 Drives: frs Location: tdot Posts: 149 Thanks: 13 Thanked 22 Times in 19 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	toronto and the hks no cat header. its in canada classifies. pm an offer

06-23-2014, 01:58 PM	#14
jng Member Join Date: Apr 2014 Drives: Toyota 86 Location: Singapore Posts: 51 Thanks: 19 Thanked 28 Times in 11 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Anyone? Have to make the decision tomm. Leaning more towards staying with stock front pipe for now. Thanks.

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