First Off, Everyone Has Their Own Experiences And Opinions. I Never Had A Problem One With The Hps System, Adam At Hps Was At All Times Helpful,bill At Hps Was Just The Same, Jessie At Speed Innovations Even Offered To Go The Extra Mile And Custom Tune My Car When He Was Coming To The Area. Now I Know Some People Have Had A Bad Exp., But I Never Did. I Read All The Problems People Had And Never Ever Had An Issue, They Even Contacted Me To Make Sure Everything Was Good.the Reason I Took It Off Was I Wanted More Power, I Bought A Kleemann S/c, Headers,ecu Tune, Hi-flow Cat's, Cost Me About 18k For Kleemann, Guess What Kleemann Uses The Same Eaton S/c As Hps, If You Go To The Kleemann Website It Says Screw Type Then You Click On It And Then It Says Eaton S/c. I Talked To Cory And He Said The Screw Type S/c (the Company) Went Out Of Business So They Started Using The Eatons Also. Had I Taken The Time To Fully Read The Kleemann Lit.,i Would Have Stuck With The Hps, Instead Of Paying 2x The Amount For Almost The Same Exact Thing.