thead

my 99 civic vp has a big crack in the manifold/converter where the upstream o2 sensor is. it finally threw a CEL. should i just buy the new magnaflow manifold/cat assembly and put new o2 sensors in it and be done with it? or should i put a civic EX Header on with a magnaflow direct fit cat after the header and the move the downstream o2 sensor to the back of the new cat? i already have the magnaflow cat back exhaust system i bought a few years back and i think the EX method should bolt right up to it after i take out the 16" pipe extension that came with the exhaust kit. just looking for some insight from people who did this already. i dont want a CEL to come on 6 months later. thanks

EL Vap133

Depends on your plans with your car and if you live in a smog exempt state.

hughsmith

I agree with El Vap133 that its all depends on the modes you are planning to do on your car.

thead

iam not planing any mods, car is all stock except magnaflow catback. the manifold/cat is cracked and worn out (230,000 miles). i live in MA. and i need the car to pass inspection, CEL needs to be out. just wondering which setup works the best from people that did it. i just saw that magnaflow lists the same year 99 EX cat as #22630 which has the o2 sensor in the middle of the cat verses what i was told to use #22628 which has the o2 sensor after the cat and only lists years up to 97, my car is a 99. do you guys know which cat will work with my year 99 civic vp?. thanks again

matt9112

to do it right oem is the only way i don't think anybody makes the combo like on our cars. manifold--cat--down pipe.