I'm wondering about these. I'v seen them mentioned in posts and want more info. I checked RA and only the inner coolant seal seems to be different than factory mazda.

Are these a real improvement?

My rebuild kit has Mazda factory coolant seals. Are these prone to failure as HP increases?

I suppose I'm looking for help decideing which to use. Are there any other HD coolant seals available?

 

I personally had a bad experiance from the teflon ones, and stock seems to work good with aot of HP. Just my opinion, others love them.