Are Mr. Gasket paper header gaskets any good? Will they leak? How long will they last? Do I need to double-stack them (they are single-stacked right now)? Should I not even bother with them and just get aluminum gaskets instead? I just got the headers all tightened up, but if those gaskets aren't going to last, I'd rather change them now.

 

don't double stack any kind of gasket. That's a sure fire recipe for leaks. Just spend $15 on some Fel pros and be done with it.

 

Don't mess with any of them. Get some Percy's dead-soft aluminum gaskets from Summit and never worry about blowing them out. Get some collector gaskets as well while you are at it.

 

Perceys, Flowtech and Earls are the top gaskets. If you want out cheap get the Mr. Gasket black premium gaskets.
As far a doubling gaskets DONT DOUBLE PAPER! Like Tas said they will leak, but you can get away with doubling the MG premium because they have metal centers that prevent them from ripping and yes it works well.

 

Thanks for the replies. I should have specified--they are SLP headers so no collector gaskets. Tas, why do you say Fel Pro? I ask because no one else said Fel Pro.

Well, I just ordered the Percy's from Summit so don't worry about my question. After installing and removing the headers multiple times (shaved steering column a little bit, thought I could get new dipstick in with pass side header in but couldn't, etc.) I'm sick of it and don't want to have to mess with them. My dad had brought me the paper gaskets I originally asked about and I figured I'd give them a try. Now I just want something that I can put on and be done with.

It is so much easier to work with the cobra--I can stand in the engine compartment with the the motor, radiator and everthing in. Spark plugs are a five minute job, header install would only take about half an hour and only that much because I'd need to remove the steering column. I wish there was more than the minimum necessary room under the hood of thirdgens. Although I think it would be very cool to put a big block in there someday, I can't imagine trying to work on one.

 

Fel-Pro is high quality as well, that' all I use. Except on the headers, I just took what the store gave me, not sure exactly what kind.

 

Another vote for the Perceys. Best money on a gasket Ive ever spent! Totally leak free, and you can reuse them! I did, and theyre still workin perfectly.