Percy header gaskets - Forums at Modded Mustangs
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post #1 of 25 Old April 14th, 2011, 11:49 AM Thread Starter
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Percy header gaskets

Has anyone every used these Percy header gaskets before? If so, how did they work, and is there any certain way they go on?

Thank you.
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post #2 of 25 Old April 14th, 2011, 11:58 AM
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I actually just installed a set of LTs and I did not use the traditional percy gaskets... Brenspeed included a set of..umm... hard to explain but "felt" gaskets that are extremely heat resistant and from what they said on the package reduce exhaust leaks... I will see if i can find them on here and post up the link.

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post #3 of 25 Old April 14th, 2011, 12:01 PM
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here are the one I installed, when i put them on I simply started all the bottom bolts and dropped the open end over the top of the bottom header bolts and the rest just fell into place!!

Mustang GT 3V Kooks Header Gaskets (05-10)

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post #4 of 25 Old April 14th, 2011, 12:13 PM Thread Starter
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Thank you for the link, I also ordered up some LTH's from Brenspeed, and bought some Percy gaskets for them. But mine are thin aluminum, about .01 thick each, and you use six a side.. I guess we will see how they go on..

Thank you!
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post #5 of 25 Old April 14th, 2011, 12:20 PM
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Which LTs did you order?

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post #6 of 25 Old April 14th, 2011, 12:22 PM Thread Starter
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MAC's, and a pro chamber.
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post #7 of 25 Old April 14th, 2011, 12:27 PM
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thats kind of odd.. I ordered the exact setup and they sent me the other gaskets...

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post #8 of 25 Old April 14th, 2011, 12:43 PM Thread Starter
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The gaskets that came, said on the top of the package that they where made by Percy for Kook's... LOL.. So I don't know, here is a link to the gaskets.

Seal-4-Good - Header Flange Gaskets - Ford - Percy's High Performance - Online Store

They are called Seal 4 Good...
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post #9 of 25 Old April 14th, 2011, 12:50 PM
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Quote:
Originally Posted by eleanor08 View Post
The gaskets that came, said on the top of the package that they where made by Percy for Kook's... LOL.. So I don't know, here is a link to the gaskets.

Seal-4-Good - Header Flange Gaskets - Ford - Percy's High Performance - Online Store

They are called Seal 4 Good...
Well... after several minutes of deep concentrated thought I have come to the conclusion, with a name like "Seal-4-Good" they have to be good...

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post #10 of 25 Old April 14th, 2011, 12:53 PM Thread Starter
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LMAO.... Im going to trust ya on this one!!!!

I was asking because I have never used aluminum gaskets before..

What brand of LTH's did you just install?
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post #11 of 25 Old April 14th, 2011, 12:55 PM
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Mac, with a Prochamber...

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post #12 of 25 Old April 14th, 2011, 01:01 PM Thread Starter
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Do you like it??? How did it go?? any chance we can get a video of the sound??
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post #13 of 25 Old April 14th, 2011, 01:35 PM
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well i am going to say i have never used them before but i am jealous of your new set up! have to let me know how you like that set up when it is complete, was thinking of a similar set up! Thanks!



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post #14 of 25 Old April 14th, 2011, 01:38 PM
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This is a post i put up in another thread about the install:

The install took me and my buddy about 4 hours... that was including removing several parts that we later deemed unnecessary to remove. you do however have to lift the motor about 1 inch and remove several things to squeeze the LTs in there, If you have a hydraulic lift make sure you lift the motor from the bottom rather than pulling it from the top, hence removing the unnecessary parts! I DO NOT RECOMMEND DOING THIS IN YOUR GARAGE!! haha i know people do it all the time but they claim it takes sometimes up to 10-11 hours, entirely too long if you ask me.

The only downside to the longtubes is that they rub on the right inner fenderwell just barely but upon making a left hand turn and getting on the throttle the motor torques right and the body rolls left so it rubs slightly, which is quite gay. But the sound and power is badass...

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post #15 of 25 Old April 14th, 2011, 02:21 PM
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Saleen - loosen the motor mounts at the k-member and slightly slide the motor over just a touch and that rub will be gone. Done it several times for guys locally. Mounts are slotted for this very reason.
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post #16 of 25 Old April 14th, 2011, 02:43 PM Thread Starter
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Quote:
Originally Posted by Emay View Post
Saleen - loosen the motor mounts at the k-member and slightly slide the motor over just a touch and that rub will be gone. Done it several times for guys locally. Mounts are slotted for this very reason.
Thank you for the heads up!!!!

rep+1
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post #17 of 25 Old April 14th, 2011, 03:25 PM
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Quote:
Originally Posted by Emay View Post
Saleen - loosen the motor mounts at the k-member and slightly slide the motor over just a touch and that rub will be gone. Done it several times for guys locally. Mounts are slotted for this very reason.
Perfect... I will do that as soon as I pull into the shop when I put the cams in!! Thank you again +1 for you!! I was getting pretty tired of it!

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post #18 of 25 Old April 14th, 2011, 03:50 PM
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I have the percy's dead soft aluminum gaskets. The instructions tell you which way they face.



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post #19 of 25 Old April 14th, 2011, 05:26 PM
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i used the stock gaskets



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post #20 of 25 Old April 14th, 2011, 06:53 PM
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Quote:
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i used the stock gaskets
do they leak??

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