I was about to ask the same question right now and decided to search and what do I find, this thread
I am also putting together my 4g63 and I have both the MLS HG and the graphite HG. Both from JNZtuning. They sent me the graphite as well, by mistake. I was planning on putting the MLS but do I need to have the head shaven some amount so it compensates for the extra thickness of the MLS headgasket? It's almost twice as thick as the graphite gasket.
If I have to shave the head I will probably just go with the graphite HG. I already had the head resurfaced but I don't know how much that removes.

azazel182, thank you for asking this question. What a coincidence.

 

No one has anything to say about this???? Come on guys. I really need to know if I can just put the MLS gasket without any head shaving..

 

a.) no you dont need to shave the head for the head gaskit
b.) return the one you didn't pay for because Eric is going to see this thred real soon i bet. hahahaha

 

No need to shave the head, the gasket will compress when you torque the studs down.

 

Thank you guys, I already went ahead and installed the MLS gasket.

As far as JNZ sending me two gaskets, I did pay extra $60 for the MLS gasket. The graphite gasket was coming with the gasket kit which I paid $200 for. I was also never told that the gasket kit comes with valve stem seals so I went ahead and ordered a separate set of them without being told that they are already included so I guess we are even.

 

If you call ahead of time in the future. They will pull out the stock head gaskid and credit you on the MLS.

 

How about the main Question: WHICH IS BETTER MLS OR GRAPHITE HEAD GASKET FOR THIS ENGINE??????

 

^^^ yeah. lol

 

since nobody will help I will just go back with an MLS head gasket.

 

It didn't have an MLS head gasket. Did this car come with one or has somebody already changed the headgasket once?

 

i notice that your profile says that you have a 1g, but you said 420a, are you working on a 1g or a 2g n/a. If it is a 2g n/a which has a 420a it has a mls stock, and that is what i would put back on, if it is a 1g n/t it had a composite style head gasket, and that is what you should use. If the engine was hot, make sure to check the head for straightness. IT is important to have a head shaved when using a mls head gasket on a 4g63.

 

Use the stock composite gasket.

 

I have a 1g and a 2g. The 2g is a 95 Mitsubishi Neon... I mean eclipse with the 420a. The car has 130k miles on it and has a broken rod, messed up crank, and a hole in the "main bearing girdle asy". When I pulled the head off it had a composite head gasket and not the MLS. From what Napa says it is supposed to have the MLS head gasket. I have no clue. I haven't had the car that long but I do know either the t-belt hadn't been changed or someone got their t-belt from Chrysler. I am leaning towards MLS.

 

graphite is ment for aluminum head and a steel block so when the aluminum head heats up and expands the graphite act as a lubricant so it slides and doesnt rip the gasket up. I would use the MLS especially since you arent en turbo so it doesnt make a diffrence anyways.

 

I bought a felpro MLS head gasket. Thanks!

 

So, just so I understand... also replacing HG..... if its a turbo motor i should go with a graphite HG? 4g63... head was warped so it is in getting shaved.

Also, I am running about 17 lbs boost, and graphite seems to blow out easier by boost and heat?