The HKS cat-back is good also. You dont have to stick to TRD
to keep from having you warranty voided. Dont let them feed you a line. I have all kinds of aftermarket shit on mine and just had warranty work done last week and they didnt say anything. But to answer your question, the catback is good, but if you want to turn some heads, get the AEM CAI
kit. Makes your car roar.