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

Deathghat · 01-02-2021, 10:26 AM

Hi, looking for someone who’s actually done this before, I worry about having a bottle neck if I leave the stock over pipe in. I have a borla cat back coming, and I’m going to do Tomei UEL Headers and I don’t think I want to believe there really is going to be noticeable performance differences between stock and AM over pipe. Also, anyone have any good front pipe recommendations? My borla is 2.5 inch at that spot and I want a catted one.
Also, new maybe sort of Tag idea “Noticeable or Negligible?” For any performance part could be put under that sort of catalog

DarkPira7e · 01-02-2021, 10:54 AM

There will not be a bottleneck unless you're making a lot of power, you're fine.

x808drifter · 01-02-2021, 10:57 AM

This also works believe it or not!

HaXx · 01-02-2021, 11:04 AM

Quote:

Originally Posted by Deathghat

Hi, looking for someone who’s actually done this before, I worry about having a bottle neck if I leave the stock over pipe in. I have a borla cat back coming, and I’m going to do Tomei UEL Headers and I don’t think I want to believe there really is going to be noticeable performance differences between stock and AM over pipe.

search up "invidia frs overpipe" on ebay, theres lots for exhaust manufacturers for the frs, but invidia is pretty much the bread and butter. looks like its $230. says its 60mm which is 2.36 inches

RToyo86 · 01-02-2021, 02:30 PM

OP aren't a huge restriction. Not required but It's a "while you are in there" type of mod since you usually need the header out anyways to replace it. The stock front pipe kills a lot of rasp. Typically you want something higher end with high flow cat and a resonator to combat that.

If you are looking at tomei headers consider gruppe-s while you are at it. You could grab their header and OP for the same price as tomei header by it self. All made in the same factory, and near identical runner design.

Ultramaroon · 01-02-2021, 08:28 PM

Quote:

Originally Posted by x808drifter

This also works believe it or not!

Could you please fix the typo in your query for me? TIA

gen3v8 · 01-03-2021, 04:21 AM

Quote:

Originally Posted by RToyo86

OP aren't a huge restriction. Not required but It's a "while you are in there" type of mod since you usually need the header out anyways to replace it. The stock front pipe kills a lot of rasp. Typically you want something higher end with high flow cat and a resonator to combat that.

If you are looking at tomei headers consider gruppe-s while you are at it. You could grab their header and OP for the same price as tomei header by it self. All made in the same factory, and near identical runner design.

Id say the PSR uel is the same?

RToyo86 · 01-03-2021, 10:56 AM

Quote:

Originally Posted by gen3v8

Id say the PSR uel is the same?

Looks like it. PSR being an Australian made solution I assume due to import costs etc?
Not sure where they are made.

Deathghat · 01-04-2021, 11:39 AM

Quote:

Originally Posted by Ultramaroon

Could you please fix the typo in your query for me? TIA

what typo

01-02-2021, 10:26 AM	#1
Deathghat Member Join Date: Dec 2020 Drives: 92 civic, 13 brz Location: Oklahoma Posts: 13 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Exhaust Hi, looking for someone who’s actually done this before, I worry about having a bottle neck if I leave the stock over pipe in. I have a borla cat back coming, and I’m going to do Tomei UEL Headers and I don’t think I want to believe there really is going to be noticeable performance differences between stock and AM over pipe. Also, anyone have any good front pipe recommendations? My borla is 2.5 inch at that spot and I want a catted one. Also, new maybe sort of Tag idea “Noticeable or Negligible?” For any performance part could be put under that sort of catalog

01-02-2021, 10:54 AM	#2
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 3,934 Thanks: 3,200 Thanked 4,095 Times in 2,045 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	There will not be a bottleneck unless you're making a lot of power, you're fine. __________________ Turbo FR-S Build - Build Thread JDL EL Recirc manifold, Boostlab BL58x Turbo w/ T51R, 17x9 ARC-8, IAG block

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01-02-2021, 10:57 AM	#3
x808drifter LMGTFY Join Date: Mar 2016 Drives: 13 FRS, 91 Miata Location: Lava Town, HI Posts: 2,776 Thanks: 5,561 Thanked 3,646 Times in 1,625 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	This also works believe it or not!

01-02-2021, 02:30 PM	#5
RToyo86 Senior Member Join Date: Mar 2018 Drives: 17 Asphalt 86 Location: Ottawa Posts: 2,168 Thanks: 1,709 Thanked 2,210 Times in 1,129 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	OP aren't a huge restriction. Not required but It's a "while you are in there" type of mod since you usually need the header out anyways to replace it. The stock front pipe kills a lot of rasp. Typically you want something higher end with high flow cat and a resonator to combat that. If you are looking at tomei headers consider gruppe-s while you are at it. You could grab their header and OP for the same price as tomei header by it self. All made in the same factory, and near identical runner design.

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