TPI has been around for quite a while now. Don't remember exactly how long, but they've been on my 'radar' for almost 20 years. Haven't heard much about them good, bad, or indifferent in quite a while tho.
I wish I'd had time to go and visit them while I was in TN two weeks ago. Then I could say more.
I remember when they started out...kinda thought it was about 18 years ago...but...honestly I had never ordered anything from them ...however i have never heard anything bad about them...
I just always ordered things from SOR for the most part back then for more stock type stuff...and MAF or Downey was for more of the aftermarket things...my dealers in my area were horable to find parts from