Exhaust help! - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Jcas · 11-26-2018, 10:42 AM

So I recently purchased UEL headers along with overpipe. I already have an invidia N1 catback. So I want to know is it worth it to get a invidia resonated catless front pipe? Will it smell a ton? Will it be crazy loud? I don’t really care about sound that much as in loud, but I don’t want it to smell like crazy inside the cabin or outside really. Don’t want to make other drivers annoyed by my exhaust fumes.
Any input helps, thanks guys!

cjd · 11-26-2018, 10:54 AM

Keep a high flow cat then. Still smelly at startup mind...

Tcoat · 11-26-2018, 10:54 AM

If you remove both cats it will smell both inside and outside of the car. Last week I was stuck under an overpass behind a WRX that was obviously catless. After the third light change and we still didn't get to turn I was almost chocking on his fumes and cursing him out in my head.
For this reason I do not miss the old days of the pre emission controlled cars at all.

Jcas · 11-26-2018, 10:59 AM

Assuming it’s more expensive for a high flow cat

Jcas · 11-26-2018, 10:59 AM

Fair enough hahah I wouldn’t want to do that to other drivers

DarkPira7e · 11-26-2018, 11:10 AM

I want to second Tcoat. If you're stuck in traffic and have to use your defroster, you're going to suffocate (ask me how I know). Naturally Aspirated, I see very little difference before/after with a tune in power made, a whole lot of difference in sound produced and the catless stink. I like the smell, but it's definitely toxic and your passengers are going to think your car is a heap of trash.

Get a high flow cat unless you're running forced induction.

tyler_win_photo · 11-26-2018, 12:51 PM

Gains are minimal going to a catless front pipe while NA even with a tune.

Gains are more noticeable when going catless with boost.

Dr. BRZ · 11-26-2018, 03:13 PM

Who gives a crap about what other people smell, you don't know them in real life. Let them choke lol. I do that every day to random strangers, completely catless straight pipe, except with me, i give them a sweet taste of corn too. Lolololololololol

86TOYO2k17 · 11-26-2018, 04:12 PM

Personally I’m catless. I noticed the smell at first. Idk if it was a newer tune revision or I just got used to it maybe both? But I don’t notice the smell at all anymore. Maybe with windows down stopped with wind blowing it forward. Very rare scenario for me though. If someone got in my car they would have no idea I had no cats. And if they didn’t notice the different exhaust sound they’d think I was stock. Maybe think I have a catback when really on it.

With 92octane btw.

PulsarBeeerz · 11-26-2018, 07:22 PM

If you can run E85 the smell isnt that bad. Gasoline, man I forgot how bad it was...

Jcas · 11-26-2018, 10:30 PM

Interesting thank you for the input!

Jcas · 11-26-2018, 10:31 PM

Sadly not many E85 stations here in NJ tho

Jcas · 11-26-2018, 10:31 PM

I mean, your not wrong I might have to send it

cjd · 11-26-2018, 10:59 PM

Honestly, I doubt you'd see a notable power difference with the stock frontpipe vs a test pipe.. With a UEL header.

11-26-2018, 10:42 AM	#1
Jcas Member Join Date: Oct 2017 Drives: 2013 Limited Subaru BRZ Location: NJ Posts: 47 Thanks: 61 Thanked 15 Times in 10 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Exhaust help! So I recently purchased UEL headers along with overpipe. I already have an invidia N1 catback. So I want to know is it worth it to get a invidia resonated catless front pipe? Will it smell a ton? Will it be crazy loud? I don’t really care about sound that much as in loud, but I don’t want it to smell like crazy inside the cabin or outside really. Don’t want to make other drivers annoyed by my exhaust fumes. Any input helps, thanks guys!

11-26-2018, 10:54 AM	#3
Tcoat Senior Member Join Date: Jul 2014 Drives: 2020 Hakone Location: London, Ont Posts: 69,845 Thanks: 61,656 Thanked 108,285 Times in 46,456 Posts Mentioned: 2495 Post(s) Tagged: 50 Thread(s)	If you remove both cats it will smell both inside and outside of the car. Last week I was stuck under an overpass behind a WRX that was obviously catless. After the third light change and we still didn't get to turn I was almost chocking on his fumes and cursing him out in my head. For this reason I do not miss the old days of the pre emission controlled cars at all. __________________ Racecar spelled backwards is Racecar, because Racecar.

11-26-2018, 12:51 PM	#7
tyler_win_photo Senior Member Join Date: Dec 2013 Drives: 2014 Scion FRS (Asphalt) Location: Redmond, WA Posts: 554 Thanks: 36 Thanked 171 Times in 141 Posts Mentioned: 6 Post(s) Tagged: 2 Thread(s)	Gains are minimal going to a catless front pipe while NA even with a tune. Gains are more noticeable when going catless with boost. __________________ AVO Stage 2 Turbo Build Thread https://wheelwell.com/tyler-nguyen-1...014-scion-fr-s

11-26-2018, 04:12 PM	#9
86TOYO2k17 Senior Member Join Date: Jan 2018 Drives: 2017 toyota 86 Location: PNW Posts: 2,131 Thanks: 336 Thanked 1,188 Times in 781 Posts Mentioned: 16 Post(s) Tagged: 0 Thread(s)	Personally I’m catless. I noticed the smell at first. Idk if it was a newer tune revision or I just got used to it maybe both? But I don’t notice the smell at all anymore. Maybe with windows down stopped with wind blowing it forward. Very rare scenario for me though. If someone got in my car they would have no idea I had no cats. And if they didn’t notice the different exhaust sound they’d think I was stock. Maybe think I have a catback when really on it. With 92octane btw. Last edited by 86TOYO2k17; 11-26-2018 at 07:37 PM.

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11-26-2018, 10:59 AM	#4
Jcas Member Join Date: Oct 2017 Drives: 2013 Limited Subaru BRZ Location: NJ Posts: 47 Thanks: 61 Thanked 15 Times in 10 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Assuming it’s more expensive for a high flow cat

11-26-2018, 11:10 AM	#6
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 3,936 Thanks: 3,200 Thanked 4,096 Times in 2,046 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	I want to second Tcoat. If you're stuck in traffic and have to use your defroster, you're going to suffocate (ask me how I know). Naturally Aspirated, I see very little difference before/after with a tune in power made, a whole lot of difference in sound produced and the catless stink. I like the smell, but it's definitely toxic and your passengers are going to think your car is a heap of trash. Get a high flow cat unless you're running forced induction.

11-26-2018, 07:22 PM	#10
PulsarBeeerz Senior Member Join Date: Mar 2017 Drives: JRSC BRZ SOLD Location: Ohio Posts: 934 Thanks: 677 Thanked 739 Times in 396 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	If you can run E85 the smell isnt that bad. Gasoline, man I forgot how bad it was...

11-26-2018, 10:30 PM	#11
Jcas Member Join Date: Oct 2017 Drives: 2013 Limited Subaru BRZ Location: NJ Posts: 47 Thanks: 61 Thanked 15 Times in 10 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Interesting thank you for the input!

11-26-2018, 10:31 PM	#12
Jcas Member Join Date: Oct 2017 Drives: 2013 Limited Subaru BRZ Location: NJ Posts: 47 Thanks: 61 Thanked 15 Times in 10 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Sadly not many E85 stations here in NJ tho

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