Injen/Amsoil. Are they alone?

[Apocalypitca]

I love nanofiber! We use them all the time on our diesel engines but there are far more diesel companies that use the nanofiber than aftermarket performance shops. I did find one company (Injen/Amsoil collaboration) that sells aftermarket filters for cars. I was wondering if you all knew of any other companies cause most of the time they aren't the best priced?

*cough* I hate k&n haha

 

[FIBA M - EC17PSE]

Royal purple filters use a similer fiber like these you discribe a mag did a tech article about filters and amsoil and royal purple both cam high only 1 other company beat them but i dont remember them.

Im also with you on k&n i dont like them either althought injen is a sister with filters of k&n they both use the same filters but injen charges more! Better name i think