I'm curious if the d15z1 (civic vx) engine will run properly if you use a regular obdo exhaust manifold and down pipe.

The d15z1 has the o2 (5-wire) sensor on top of the manifold (think of hf manifold) and its right before the catalytic converter.

The d16a6 (one of the stock obdo exhaust manifold) is a header type 4-1 style and the catalytic converter is after the down pipe.


On my Civic rt4wd I need to clear the transfer case and so I either need to modify the d15z1 down pipe or I can run the d16a6 without modifying it and just stick the 5-wire sensor in there.


Any suggestions?

Thanks,
Shane

 

the point of having the wideband that close to the head is to decrease the time that it takes for the O2 to read the exhaust pulse, increasing that length may cause problems for the stock P07. If you're tuning it then who cares.