ad08r is good if you r ok with the price
PPS wont go wrong for daily use as we normally dont track our is250/350, I got it with 900 with promotion at 18x8 40 225
I dont rekon u put PPE on ur setup, trust me, u wont like it. if you wanna do it must put High flow cat wekd in your mid pipe after ur ppe if you wanna put in.
try it with HFC. if u dont like it weld stock or after market catalytic converter on.