2.5in cat
#2
Re:2.5in cat
there is basically no REAL high flow cat. All cats must meet a certain emissions requirement to be passed. All cats are going to be restrictive, dont pay $50 or $100 for a "high flow cat", just get a normal one, or get a straight pipe "test pipe".
#3
#5
Re:2.5in cat
make sure you dont have an existing sensor in your current cat, if you do and get a straight pipe or resonator, you will cause a check engine light... i believe only OBD II has the O2 sensor also in the cat, I could be wrong tho