Re: Jasper engines????
I had a head gasket blow on my 06 3.7L, which then caused other ensuing damages... however, I replaced it with a Jasper 3.7, and it has been great (knock on wood). The warranty is 3 year 100k miles, and the only thing I had go wrong was my valve springs were bad. They replaced them with higher quality valve springs and it didnt cost me a dime.
I would recommend them if you go down that route.