Exhaust change to Invidia - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Mikeez · 09-20-2015, 08:26 PM

Hey, I want to buy the exhaust pipes from invidia...

However, law says we have to have a catted front pipe. Anyways, is it going to restrict if I buy 2.5" over pipe and catalyst-back exhaust without buying front pipe?

I know it will restrict the air flow, but what will happen more?

ryoma · 09-20-2015, 08:34 PM

tbh, you probably won't see much gains from it. probably around 5 WHP at the most, if at all. the most gains you will get is with an aftermarket header, especially with a tune.

zc06_kisstherain · 09-20-2015, 08:37 PM

there is nothing to do with catalytic converter with any exhaust. you're not changing front pipe.

Mikeez · 09-21-2015, 10:13 PM

Quote:

Originally Posted by ryoma

tbh, you probably won't see much gains from it. probably around 5 WHP at the most, if at all. the most gains you will get is with an aftermarket header, especially with a tune.

Quote:

Originally Posted by zc06_kisstherain

there is nothing to do with catalytic converter with any exhaust. you're not changing front pipe.

I know, I am asking if I change every pipe except for the front pipe will it unbalance air flow?

sw20kosh · 09-21-2015, 10:26 PM

Quote:

Originally Posted by Mikeez

I know, I am asking if I change every pipe except for the front pipe will it unbalance air flow?

No

Rifle · 09-21-2015, 11:36 PM

I currently have the Invidia N1 w/ rest of the piping stock. Too quiet for me. Much louder than stock, but still quiet (imho). I have a Berk Catted Front Pipe in the garage, and I just purchased 1320performance UEL headers / tanabe OP and will have all 3 additional pieces installed within the month. I'll be sure to take a before/after.

Mikeez · 09-24-2015, 12:56 PM

Quote:

Originally Posted by sw20kosh

No

Thank you. Perfect answer

Quote:

Originally Posted by Rifle

I currently have the Invidia N1 w/ rest of the piping stock. Too quiet for me. Much louder than stock, but still quiet (imho). I have a Berk Catted Front Pipe in the garage, and I just purchased 1320performance UEL headers / tanabe OP and will have all 3 additional pieces installed within the month. I'll be sure to take a before/after.

hahaha, we will see. My items are shipped so I am waiting, but I will only install in winter.

09-20-2015, 08:26 PM	#1
Mikeez Engineering Student Join Date: Jan 2014 Drives: Scion FR-S 2015 Location: Montreal Posts: 628 Thanks: 18 Thanked 49 Times in 46 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Exhaust change to Invidia Hey, I want to buy the exhaust pipes from invidia... However, law says we have to have a catted front pipe. Anyways, is it going to restrict if I buy 2.5" over pipe and catalyst-back exhaust without buying front pipe? I know it will restrict the air flow, but what will happen more? __________________ There’s no time to stop for gas, we’re already late

09-20-2015, 08:34 PM	#2
ryoma Senior Member Join Date: Mar 2015 Drives: 2015 Subaru BRZ Limited CWP Location: SoCal Posts: 1,561 Thanks: 34 Thanked 669 Times in 469 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	tbh, you probably won't see much gains from it. probably around 5 WHP at the most, if at all. the most gains you will get is with an aftermarket header, especially with a tune. __________________ My 2015 CWP BRZ Build

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09-21-2015, 11:36 PM	#6
Rifle EX-86 Supercharged God Join Date: Aug 2015 Drives: '16 Series.HyperBlue BRZ Location: Philadelphia->Montana Posts: 766 Thanks: 220 Thanked 479 Times in 253 Posts Mentioned: 16 Post(s) Tagged: 1 Thread(s)	I currently have the Invidia N1 w/ rest of the piping stock. Too quiet for me. Much louder than stock, but still quiet (imho). I have a Berk Catted Front Pipe in the garage, and I just purchased 1320performance UEL headers / tanabe OP and will have all 3 additional pieces installed within the month. I'll be sure to take a before/after.

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