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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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03-25-2017, 09:29 AM | #1 |
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Doubling up grimspeed exhaust gasket?
So I know the grimspeed gaskets are 20% thicker than OEM, but I can't get the connection between a motiv overpipe and motiv high flow cat to seal for the life of me.. tried oem gasket, grimspeed gasket, grimspeed gasket with copper spray, tried doubling em up, both with copper spray and it seemed to seal.. any disadvantage of doubling up on 2 "thicker" gaskets? is it like a condom where its just no bueno to double up?
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03-25-2017, 10:09 AM | #2 | |
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03-25-2017, 01:27 PM | #3 |
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03-25-2017, 01:29 PM | #4 |
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03-25-2017, 01:48 PM | #5 |
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03-25-2017, 01:52 PM | #6 |
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OP, I reckon you could safely put together as many gaskets as you want to in an automobile exhaust system ...... just as long as they don't leak.
However, don't try that on a head gasket or a plate on a boiler ..... humfrz |
03-25-2017, 09:20 PM | #7 |
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Just use OEM gaskets. I went back and forth for like a month with Grimmspeed gaskets.
OEM, sealed up perfectly. If you're paranoid (like i was) use a little RTV with the OEM gasket. For header to block - Grimmspeed gasket is great. Forrester XT gasket is better (and cheaper). |
The Following User Says Thank You to SpectreRT For This Useful Post: | Gabzor (03-26-2017) |
03-25-2017, 09:59 PM | #8 |
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Remflex crush gasket is the ticket. I also have the Motiv overpipe and the front pipe and the Remflex gaskets have been leak free for the last 50K miles. I also use them between heads and header, header and overpipe and midpipe to axleback.
This is the one I used for the overpipe to front pipe: https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 You just have to enlarge the bolt holes on the gasket a tiny bit, since the bolt pitch is slightly smaller on our cars. |
The Following User Says Thank You to toeout For This Useful Post: | Gabzor (03-26-2017) |
03-26-2017, 12:47 AM | #9 |
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Thanks for the suggestions guys, any suggestions for a bigger gasket for perrin 2.55" gasket? (for those eliminating the donut for 2.5 CBE systems) I was going to get the 2.55" gasket and a grimspeed one and go to a machinist and say here, but thanks
@SpectreRT so the XT ones are better than the grimspeeds huh? makes sense being turbo I guess I'll try both your suggestions if the grimspeed double gasket setup wants to leak again |
03-26-2017, 10:43 AM | #10 | |
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03-26-2017, 12:29 PM | #11 |
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I second the remflex gasket... they work wonders.
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03-27-2017, 11:33 AM | #12 | |||
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03-27-2017, 12:24 PM | #13 |
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I used the Grimmspeed gaskets for my header and it was the first time I ever messed with a header. Excellent quality and (evidenced by the fact that they are sealed nicely and not leaking at all) they must be forgiving too because it was a bit of a learning process.
I heard about using the GS gaskets from other users on this forum |
03-31-2017, 08:37 AM | #14 |
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Had no problem on the header, just OP/FP.. @GRimspeed do you guys sell any 2.55 gaskets for the perrin? loved the quality of your gaskets vs that one
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