Pre-sized PEEK seals!
Mullie Motors is now offering pre-sized PEEK seals for all common (HD and other) plumbing manifolds! Stop those air-leaking intakes that cause engine mal-functioning or even damage. Pre-sized PEEK seals are available in the following sizes:
|Order No.||Inner diameter||Used on||HD part #|
|H-D 1||1-9/16”||1930-48 74”& 80” Flathead, |
1936-39 61” OHV, 1940-46 WLD
|H-D 2||1-7/16”||1932-73 45” W & G models||1118-30A
|H-D 3||1-45/64”||1940-54 61”& 74” OHV (Knucklehead & Panhead), |
also K models & WR
These PEEK seals cost € 45,- per set (incl. VAT, excl. shipping).
Order your PEEK seals through email@example.com
Important note: pre-sized PEEK seals should only be used on intake manifolds that are in excellent condition. That is, manifolds that are round, have an unworn, smooth surface, and have the correct, original diameter. Old manifolds are often worn or damaged. For these, we offer custom-fitting of PEEK seals, see below.
PEEK intake seals
Mullie Motors offers the service to convert your intake manifold sealing to PEEK seals. You send us your intake manifold and intake nuts, and we make a pair of intake seals custom fitted to your manifold and intake nuts (for a perfect seal, it is required that your manifold is dressed up, and the seals are made to the exact dimensions of your manifold and intake nuts).
A pair of custom-fitted PEEK seals usually costs around a 90 Euros, depending on the condition of your manifold and intake nuts, and the current price for PEEK stock (which is very expensive and varies with the oil prices).
Contact us through firstname.lastname@example.org to have your plumber intake converted to PEEK-seals.
Two examples: Left is an HD WLA manifold fitted with PEEK seals. Right is an Indian Chief manifold reworked for PEEK seals.
Below is a brief description of the process.
- First, we clean up the manifold to make sure they are round and have a smooth surface.
Next, we turn a pair of seals out of a piece of PEEK stock, fitted to your manifold and intake nuts.
- Once you have received the seals and manifold back, you can install them back on your engine. Make sure you do not mix up the rings, nuts, and manifold side as each is a fitted triple. Also make sure everything is nice and clean, the threads on the nuts and intake are in good order, that the mating surface of the intake is clean and flat, and that the manifold lines up correctly with the intakes.
- Once you have installed the manifold and seals, it is mandatory to check for intake leaks. Here, a big cork with a tire valve is pressed into the manifold. We apply a bit of compressed air (15 psi maximum) to pressurize the manifold and check for air leaks by looking for bubbles after applying some soapy water all around the intake nuts, nipples, etc. Only tighten the intake nuts as necessary until all bubbling stops. Of course, be careful not to overtighten the nuts to get rid of a leak that has other causes than the intake seals.