Erik@MIL.SPEC

iTrader: (94)

In our experience, if you are still running on the OEM Throttle shaft seals, you most likely have a boost leak. With ‘03/04 Evo's, we have witnessed an 80% chance that your OEM throttle shaft seals are cracked.

If you own a 05/06 Evo, those odds increase to over 90%

MIL.SPEC seals are metal cased, like the OEM units, but offer SUBSTANTIALLY more lip seal thickness.

OEM seal:


MIL.SPEC seal:


Our vendor claims they can hold 50+ psi, but we have only tested them to 35psi on one of our cars during a boost leak test with ZERO Leakage

This is a good idea whether you're running a ported throttle body or an OEM unit.

For more info, along with how and where to order go here:
https://www.evolutionm.net/forums/sh...d.php?t=364108

Vivid Racing

iTrader: (98)

Looks good!

mdsevo06

iTrader: (41)

Why dose the 05/06 odds increase? I would think the older VIII would have a higher rate.

Erik@MIL.SPEC

iTrader: (94)

You would think, but I am just relaying our experience.

Regardless of which year TB you have, there's a good chance it's leaking...the kind of odds I'd be willing to bet large sums of money on

travman

iTrader: (26)

I just installed these this weekend.......price was right, shipping was fast.

I installed the machV seals about a month ago and after the install I boost leak tested them and they leaked right away (imo they just aren't a good seal). I know, i should have bought the works seals, but its against my religion. Thankfully i heard about these seals and promptly order them - after installation I had 0 (audible) leakage from the TB and all is fine n' dandy.

Long term test will just have to wait and see - im confident they will hold up to the test.

Thanks

wshihdnevo

iTrader: (88)

I installed the works ones when i did my Magnus b/c I didnt want to pull it off twice. Im sure I stopped some leakage. If these seals ever fail or I port my TB I will send it to you guys and get these, they look great.

FathouseFab

iTrader: (5)

Do these seals come standard in your 65mm throttle bodys?

Erik@MIL.SPEC

iTrader: (94)

Of course

They are complimentary, included at no extra cost...even FREE if you like to look at things that way

Aby@MIL.SPEC

iTrader: (161)

I dont know why the 05/06 tb seals crack sooner.....but i know they do. I have seen a cracked seal on '06 tb with 1835 miles on it!!

I have only seen cracked seals on the throttle cable side of the tb as well......not sure why

nitz

iTrader: (3)

i have a question. is zero leakage really zero leakage?
can you pump 35psi in there and have it hold indefinitely, or is there some acceptable bleeding allowed. i did a boost leak test the other day and still run the recirc dump valve, so i had to block of the rocker cover vent and some other hose going to the what i believe is related to some fuel apparatus since they would both cause leaking.. even after doing that pressure would bleed off, but without any audible leaking.

ExViTermini

iTrader: (25)

More torsional load. The shaft has more play on that side of the TB.

4G63 T

iTrader: (14)

any How-to install?

Erik@MIL.SPEC

iTrader: (94)

We're working on a how-to install. However, Aby and I have very busy schedules at the moment.

We have also had some shops inquire about larger orders, and larger orders are not a problem. PM me with any questions and volume discount inquiries

4G63 T

iTrader: (14)

Sharkbite2000

iTrader: (21)

MILSPEC get full props for TB that don't leak I put my foot on it 44+ psi daily and it HELD!