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Old 08-11-2017, 08:45 PM   #1
NotTodayEvo
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Default NEED HELP! Used Invidia catted downpipe and Q300, what gaskets do I need?

Hey community!! I've been looking everywhere and can't seem to find a definitive answer.... bought a used 3in invidia catted downpipe and a q300 exhaust for my 16 STI I need to replace all the gaskets. Anyone know exactly what gaskets I need? Looks like two 2.5in gaskets and two 3 in gaskets. Was planning on re-using the factory turbo to bellmouth gasket. Should I replace that too? Do I need to buy a donut gasket for the DP to midpipe? or is that only needed if you keep a stock downpipe? Thanks!
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Old 08-12-2017, 02:15 AM   #2
Goosed
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Hello!

Okay, so you don't need doughnut gaskets since you are now pairing an invidia to a downpipe. But, I unfortunately don't know off hand what gaskets you need. I would recommend giving rallysport direct a call or email them, they can tell you exactly what you need and I'm sure they have the parts as well. Invidia themselves also have great customer service and can help ya out. Sorry I could not be more helpful...good luck!
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Old 08-12-2017, 06:03 PM   #3
Samurai Jack
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It's called looking at the exhaust and measuring the size of the pipe openings to determine which size/type gaskets you need.

Honestly, if you can't figure that out, better to just take it to someone and have it fixed. This isn't rocket science.
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Old 08-12-2017, 06:28 PM   #4
NotTodayEvo
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Quote:
Originally Posted by Samurai Jack View Post
It's called looking at the exhaust and measuring the size of the pipe openings to determine which size/type gaskets you need.

Honestly, if you can't figure that out, better to just take it to someone and have it fixed. This isn't rocket science.
No need to be an a-hole about it. Obviously I did that and there are many options. 64mm by 75mm 63mm by 70mm. Both of which could fit. Different grades of material. Was just looking for someone who likely has done this and wanted to see what parts they used. Thanks for the help though
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Old 08-12-2017, 06:40 PM   #5
meinct
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Old 08-12-2017, 08:34 PM   #6
Samurai Jack
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Quote:
Originally Posted by NotTodayEvo View Post
No need to be an a-hole about it. Obviously I did that and there are many options. 64mm by 75mm 63mm by 70mm. Both of which could fit. Different grades of material. Was just looking for someone who likely has done this and wanted to see what parts they used. Thanks for the help though
I'm not. And no, it's not obvious.
Where does it say you actually measured anything? No where.

Its a darn gasket.
If you weren't so lazy, you would have simply gone out to a Vendor's site like RallySportDirect, Grimmspeed, etc. and looked up 3" gaskets, 2.5" gaskets,etc.

If you can't figure out how to do something so basic, then you shouldn't be working on your car.
It's that simple.

This is probably the most basic thing you can do, easier than figuring out how much oil you have to put in your car for an oil change because for that, you have to open the User's manual, if you didn't already know.

You may not like hearing it, but it's true. And you are not the only one who has apparently no clue how to do something so basic.

Last edited by Samurai Jack; 08-13-2017 at 01:27 PM.
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Old 08-13-2017, 12:54 PM   #7
Max Capacity
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I believe they are 31534 exhaust gaskets. plus the Grimmspeed 2X 3" gasket in two places.

You don't need all those gaskets in post #5.

I took mine off yesterday because it was to loud with my catless DP.

google 31534, Auto parts stores have them for $7.00 they will also have a 3" two hole gasket, just ask the counter person.
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