stilljester

I was wondering if anyone was running one and where they may have put it... Pre-Cat or Pre Muffler? Did you have any issues with running it pre-cat with the O2 sensors. Thanks

maaliish

to adapt to extra flow and since you're only using it for brief periods of time, the ECU will not be able to take full advantage. Thats just my opinion...in all likelyhood you will see very minimal gains with lots of noise.

PD Performance

If its just for track days or some fun every so often on the street then you shouldnt' have any problems.


However putting it before the pre 02 sensor could cause fueling problems so it should be after the first sensor but before the cat.. After the cat will be useless.

stilljester

highway driving, etc. Basically when I'd like a little extra noise, MPG or as little exhasut restriction as possible. Will there be issues being before the second O2 sensor? If you had a high flow cat do you still feel it would be useless? TIA

stilljester

to extra flow? 10 min? 50miles? Would a chipped ECU still exhibit the same learning curve? Thanks

boostedTT

There is no way to get a dump before the first o2. Atleast in my car.....

boostedTT

Run just an open downpipe, and its niiice. Kinda loud though

maaliish

for things to run well and having a bypass will not be optimal. Driving on the highway with bypass open is probably a nightmare on your ears. Driving on the track will be fun, but I'm afraid that if you place it pre-cat, your ECU will throw a code before it will take advantage of the extra flow, unless you do an 02 delete.

maaliish

Thanks for all your help.

PD Performance

Your car wont' run correctly with it before the first 02 since it will throw the readings off.