guys who are running Catless front pipe - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

lxsedan · 06-15-2013, 04:34 PM

Hey guys that are running catless front pipes, Invidia, Motiv etc.. are you guys having problems with smoke and smell coming from the exhaust? Or does the first cat fix it all.

Wanting to do the front pipe but do not want smoke and fumes going catless on the front pipe.

hunter3232792 · 06-15-2013, 05:13 PM

j2 works fine for me no problems

midnight23 · 06-15-2013, 05:49 PM

I'm getting no smoke at all with a fully catless engine back, when I had just the catless front pipe there was no fumes or smoke as well, the strong fumes come once you take out the headers.

Mike86 · 06-15-2013, 05:57 PM

Imvidia catless front pipe no smell or smoke

SkAsphalt · 06-15-2013, 08:38 PM

I only had smell and smoke when burning in my exhaust's resonator. no smell or smoke. the secondary cat is quite small.

20firestorm13 · 06-16-2013, 12:34 AM

Did you change everything at once? It's not uncommon for a smell to occur for a few days as your new system burns off impurities that are on it after it is hooked up. If you smell fuel/gas exhaust that can come from exhaust leak or you could be running rich. I would suggest a tune, that helps a ton as well.

lxsedan · 06-16-2013, 12:54 AM

I only did the cat back but I wanna do the front pipe as well. I been hearing stories of other guys who did the catless front pipe smoking and smelling but on different cars.

I guess the question now is stick with Invidia to go with the Q300 or go Motiv

wparsons · 06-16-2013, 09:38 AM

Any new exhaust part can (and likely will) smoke and smell a bit for the first few days as coatings and impurities burn off, but in the long run they'll be fine. If you run fully catless it will definitely smell different in the long run.

CircuitJerk · 06-16-2013, 09:54 AM

Before I put the header on I had a P&L overpipe, catless frontpipe and an SRT catback.
I only smelled a little fumage when I started it in the garage. Not bad, but expected.
Once I had a header with a high flow cat installed, the fumes seemed a bit stronger but to me, it's all relative.
I grew up around cars with no cats, and less efficient ones. I actually enjoy the smells. As long as I'm not couped up in an enclosed space, it ain't nothin' but a thang...

Propaganda · 06-17-2013, 12:52 AM

Stock header with ark front pipe. No smells at all other than just exhaust.

My last car had a catless header, but catted front pipe and that reeked.

06-15-2013, 04:34 PM	#1
lxsedan Senior Member Join Date: May 2012 Drives: 2013 BRZ SWP Location: Canada Posts: 172 Thanks: 26 Thanked 29 Times in 19 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	guys who are running Catless front pipe Hey guys that are running catless front pipes, Invidia, Motiv etc.. are you guys having problems with smoke and smell coming from the exhaust? Or does the first cat fix it all. Wanting to do the front pipe but do not want smoke and fumes going catless on the front pipe.

06-15-2013, 05:13 PM	#2
hunter3232792 Senior Member Join Date: Aug 2012 Drives: FRS Location: miami Posts: 716 Thanks: 36 Thanked 170 Times in 112 Posts Mentioned: 31 Post(s) Tagged: 3 Thread(s)	j2 works fine for me no problems __________________

06-15-2013, 05:49 PM	#3
midnight23 dying bird under the hood Join Date: Mar 2013 Drives: 2013 SWP Limited BRZ Location: Disneyland, California Posts: 1,331 Thanks: 546 Thanked 451 Times in 295 Posts Mentioned: 34 Post(s) Tagged: 0 Thread(s)	I'm getting no smoke at all with a fully catless engine back, when I had just the catless front pipe there was no fumes or smoke as well, the strong fumes come once you take out the headers. __________________ GReddy Turbo BRZ tuned by Evasive Motorsports Build Thread Instagram

06-16-2013, 12:34 AM	#6
20firestorm13 Senior Member Join Date: Mar 2013 Drives: 2017 Halo Toyota 86 Location: Frisco Tx Posts: 221 Thanks: 44 Thanked 37 Times in 27 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Did you change everything at once? It's not uncommon for a smell to occur for a few days as your new system burns off impurities that are on it after it is hooked up. If you smell fuel/gas exhaust that can come from exhaust leak or you could be running rich. I would suggest a tune, that helps a ton as well. __________________ previous build thread! http://www.ft86club.com/forums/showt...236#post962236

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06-15-2013, 05:57 PM	#4
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)	Imvidia catless front pipe no smell or smoke

06-16-2013, 12:54 AM	#7
lxsedan Senior Member Join Date: May 2012 Drives: 2013 BRZ SWP Location: Canada Posts: 172 Thanks: 26 Thanked 29 Times in 19 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	I only did the cat back but I wanna do the front pipe as well. I been hearing stories of other guys who did the catless front pipe smoking and smelling but on different cars. I guess the question now is stick with Invidia to go with the Q300 or go Motiv

06-16-2013, 09:54 AM	#9
CircuitJerk Pull my finger... Join Date: Dec 2011 Drives: Silver Scion Slushbox Location: Illinois Posts: 996 Thanks: 476 Thanked 367 Times in 226 Posts Mentioned: 26 Post(s) Tagged: 0 Thread(s)	Before I put the header on I had a P&L overpipe, catless frontpipe and an SRT catback. I only smelled a little fumage when I started it in the garage. Not bad, but expected. Once I had a header with a high flow cat installed, the fumes seemed a bit stronger but to me, it's all relative. I grew up around cars with no cats, and less efficient ones. I actually enjoy the smells. As long as I'm not couped up in an enclosed space, it ain't nothin' but a thang...

06-17-2013, 12:52 AM	#10
Propaganda Diamonds & Cadillacs Join Date: Jul 2012 Drives: '13 fr-s, 1974 911s Location: Internet Posts: 392 Thanks: 162 Thanked 157 Times in 102 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Stock header with ark front pipe. No smells at all other than just exhaust. My last car had a catless header, but catted front pipe and that reeked.

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