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Old May 4, 2016 | 09:21 AM
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Default FAST Intake seals

Do factory replacement intake seals (for cathedral heads) work on FAST intakes? Or do you have to buy FAST seals?
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Old May 4, 2016 | 09:23 AM
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I used FelPro factory replacements. $24 or so at Advance with online coupon
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Old May 4, 2016 | 10:28 AM
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thanks
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Old May 4, 2016 | 12:58 PM
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I'm pretty sure the FAST seals are a little thicker than OEM and you'll probably want the genuine FAST seals to ensure there are no vacuum leaks.
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Old May 4, 2016 | 01:29 PM
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Stock ones
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Old May 4, 2016 | 01:30 PM
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has anyone ever measured them?
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Old May 4, 2016 | 01:32 PM
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I have not ever had any to measure. But I have smoke tested my engine while troubleshooting other issues and there were no vacuum leaks from the intake.

If they are thicker this is the first I've heard of it.
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Old May 4, 2016 | 02:12 PM
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Originally Posted by thunderstruck507
I have not ever had any to measure. But I have smoke tested my engine while troubleshooting other issues and there were no vacuum leaks from the intake.

If they are thicker this is the first I've heard of it.
They definitely look a little thicker and seem to fit nice and tight in the ports I just replaced mine a few days ago (OEM to FAST seals) I didn't actually measure them they just looked a little thicker mine could have just been worn is all.
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Old May 4, 2016 | 02:14 PM
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Yeah, it's hard to say for sure since they tend to flatten out so much after they've been used.

If someone has some new Fast and new stock replacements and could weigh in that would be great. If they are thicker I'd like to get some just for added insurance.
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Old May 4, 2016 | 02:16 PM
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Ya I didn't even think to check it I took my intake off to port it and I replaced the rope gasket and port seals at the same time.
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Old May 4, 2016 | 02:48 PM
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Fast actually tells you to buy stock ones
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Old May 4, 2016 | 03:13 PM
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Ehhh I don't see what difference it makes either way they both do the same job really. Only reason I got the FAST port seals was because I was replacing the rope gasket.
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