i got my car brand new from mastro and i put an hks catless downpipe on it- i think a friend of mine asked about warranty before, i didnt kno if (like turbo upgrades) x-ing the cats automatically voids the warranty reguardless of whether or not ne thing is wrong- im askin this cuz i need service soon and i need to kno if i should put the cats back on before i take it in or not