LIC Motorsports Aluminum Cylinder Head Plugs - Subaru Models (inc. 2002-2007 WRX/STi)
Manufacturer Part # 121811
The LIC Motorsports cylinder head plugs (aka half moons) units are designed to be a replacement one time for life, as they are made from 6061 aluminum and won't succumb to the same issues as the plastic OEM units do in regards to the constant fluctuations of temperature and breakdown/shrinkage of the plastic. These are a precision fitment and depending on temps may require a tap to seat perfectly into place.
The LIC Motorsports 6061 aluminum cylinder head plugs come as a set (4 quantity), they are an inexpensive part that will ensure the backside of your motor stays leak free, and last but not least....they are PROUDLY MADE IN THE USA!
Just like with the OEM units, you must use sealant when installing these. Permatex grey or black work just fine.
RallySport Guarantee - 30 Days
Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.
RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.
The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
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Great addition solid aluminum
shockwave 7 months ago
These are great have a much better long lasting factor over the factory plastic ones
Exactly what I wanted
Rick C. 3 years ago
Had to do the valve cover gaskets but I did not want to mess with the factory half moon plugs, so I ordered a set of these and all I can say is that they fit perfect(make sure you put them in carefully so that both side are flush against the heads) and should last a life time.
jake.ober201240264 3 years ago
These are amazing, I think every engine should have these half moon seals on them. Way better than the plastic ones.
These are Sick!
jake.ober201240264 3 years ago
If you're doing any work by the valves (such as replacing valve cover gaskets) then GET THESE! these are solid aluminum (as opposed to the crap plastic stock ones) these will never bust or break or chip.
Installed in my EZ30D
dodge-venom 4 years ago
I've replaced the half-moons on the H6 in my car currently with factory replacements. Wasn't too happy about it because they break so easily and valve cover leaks are common on the H6, so i wanted to be able to pull it all our and reseal if necessary. So when it came to prep a spare low KM JDM H6 to drop into my car I jumped onto these. Look awesome (even though no one will see it), perfect fit, no leaks. Just make sure you install these flush before installing the valve cover.
QUESTIONS & ANSWERS
Q: installation KornShaDoW097 4 years agoAnswer
Do these require sealant to install or do they install dry?
A: Your answer can be found in the above product description. Note: Just like with the OEM units, you must use sealant when installing these. Permatex grey or black work just fine.
noah 4 years ago
A: Subaru uses Subabond to seal the plugs from the factory and we recommend that you use Subabond or a similar sealant with these plugs.
Zach G. 4 years ago