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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 01-02-2021, 10:26 AM   #1
Deathghat
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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
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Old 01-02-2021, 10:54 AM   #2
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There will not be a bottleneck unless you're making a lot of power, you're fine.
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Old 01-02-2021, 10:57 AM   #3
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This also works believe it or not!

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Old 01-02-2021, 11:04 AM   #4
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Originally Posted by Deathghat View Post
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
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Old 01-02-2021, 02:30 PM   #5
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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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Old 01-02-2021, 08:28 PM   #6
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Could you please fix the typo in your query for me? TIA
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Old 01-03-2021, 04:21 AM   #7
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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?
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Old 01-03-2021, 10:56 AM   #8
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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.
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Old 01-04-2021, 11:39 AM   #9
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Could you please fix the typo in your query for me? TIA
what typo
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