What to look out for in buying a used exhaust? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Thet · 04-19-2015, 02:18 AM

Buying a n1 invidia ti tips exhaust 2nd hand

Anything i should be looking out for prior to buying?

Tcoat · 04-19-2015, 02:25 AM

Quote:

Originally Posted by Thet

Buying a n1 invidia ti tips exhaust 2nd hand

Anything i should be looking out for prior to buying?

Worn or odd shaped flange boltholes or cracked welds will show it was loose or improperly installed.
Scrapes or dents (of course)
Abnormal rust patterns.

Ultramaroon · 04-19-2015, 02:28 AM

Holes in the sides are bad. Holes in the ends are ok.

Tcoat · 04-19-2015, 02:32 AM

Quote:

Originally Posted by Ultramaroon

Holes in the sides are bad. Holes in the ends are ok.

Holes in the ends are generally regarded as required although I am sure there is at least one person on here that would debate that.

Ultramaroon · 04-19-2015, 02:59 AM

Quote:

Originally Posted by Tcoat

Holes in the ends are generally regarded as required although I am sure there is at least one person on here that would debate that.

I'm looking at a used catback that has normal rust patterns. Those are ok, right?

tyrantcf · 04-19-2015, 03:14 AM

Quote:

Originally Posted by Ultramaroon

I'm looking at a used catback that has normal rust patterns. Those are ok, right?

Yeah that's fine. It's that really red rust from leaky blinker fluid that you need to look out for.

Tbird232ci · 04-19-2015, 04:45 AM

Quote:

Originally Posted by Tcoat

Holes in the ends are generally regarded as required although I am sure there is at least one person on here that would debate that.

That would be me.

http://kalecoauto.com/index.php?main...products_id=42

Ultramaroon · 04-19-2015, 05:03 AM

Quote:

Originally Posted by Tbird232ci

That would be me.

http://kalecoauto.com/index.php?main...products_id=42

seems legit

Tcoat · 04-19-2015, 10:13 AM

Quote:

Originally Posted by Ultramaroon

I'm looking at a used catback that has normal rust patterns. Those are ok, right?

As long as there isn't one shaped like Jesus you should be fine!

Tcoat · 04-19-2015, 11:01 AM

Guess I should clarify what I mean by "abnormal rust". Parts that are supposed to be stainless should have no rust at all. If they do then you may not be getting what you are being told you are. Also any welded joint may have a small colour change or even a light coating of rust but if the coating is heavy or extends more then a short distance down the pipe it may have been overheated during welding.

dnieves · 04-19-2015, 11:39 AM

Quote:

Originally Posted by Tcoat

Guess I should clarify what I mean by "abnormal rust". Parts that are supposed to be stainless should have no rust at all. If they do then you may not be getting what you are being told you are. Also any welded joint may have a small colour change or even a light coating of rust but if the coating is heavy or extends more then a short distance down the pipe it may have been overheated during welding.

Article on stainless steel rusting:
http://www.sperkoengineering.com/html/Rust.pdf

Ultramaroon · 04-19-2015, 02:59 PM

Quote:

Originally Posted by dnieves

Article on stainless steel rusting:
http://www.sperkoengineering.com/html/Rust.pdf

Excellent article. Speaking of "free iron," this reinforces one of the corrosion control practices I learned long ago in the Navy: Never use a wire brush on anything but untreated steel/iron. Ceramic abrasives are electrically neutral and therefore do not promote pitting.

Scotch‑Brite™ for the win.

Ultramaroon · 04-19-2015, 03:00 PM

Quote:

Originally Posted by Tcoat

As long as there isn't one shaped like Jesus you should be fine!

But wouldn't that make it the holy grail of exhaust systems?

stock · 04-19-2015, 05:58 PM

Mice living in the muffler

04-19-2015, 02:18 AM	#1
Thet Member Join Date: Mar 2015 Drives: Blue Location: Ny Posts: 17 Thanks: 0 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	What to look out for in buying a used exhaust? Buying a n1 invidia ti tips exhaust 2nd hand Anything i should be looking out for prior to buying?

04-19-2015, 02:28 AM	#3
Ultramaroon not playing cards Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 32,395 Thanks: 53,053 Thanked 37,228 Times in 19,308 Posts Mentioned: 1118 Post(s) Tagged: 9 Thread(s)	Holes in the sides are bad. Holes in the ends are ok. __________________ service manuals

04-19-2015, 11:01 AM	#10
Tcoat Senior Member Join Date: Jul 2014 Drives: 2020 Hakone Location: London, Ont Posts: 69,841 Thanks: 61,656 Thanked 108,295 Times in 46,456 Posts Mentioned: 2499 Post(s) Tagged: 50 Thread(s)	Guess I should clarify what I mean by "abnormal rust". Parts that are supposed to be stainless should have no rust at all. If they do then you may not be getting what you are being told you are. Also any welded joint may have a small colour change or even a light coating of rust but if the coating is heavy or extends more then a short distance down the pipe it may have been overheated during welding. __________________ Racecar spelled backwards is Racecar, because Racecar.

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