[tmaung]

I uninstalled the AR 3" catless downpipes yesterday and wooh what a difference. My car was a beast before and now it is not as fun anymore . When I stomp on the gas, there is definitely a lag there now and doesn't pull as hard. To those thinking of getting the downpipes, you will not regret it! Just be sure to do emission testings first so you are good for a year or two.

[5soko]

The biggest difference in noticable power is not when the items are installed, its more than usually when there uninstalled

[tmaung]

Yeah. The difference wasn't that big when I installed them.

[vase330]

Wait a minute man, are you saying you wont pass inspection with the AR downpipes on? Are you catless or catted? Please clarify. I hate to have them uninstalled. I do have the OEM originals, but not looking forward to having them swapped twice just for inspection.

[tmaung]

Mine were catless. I am just saying for the sake of simplicity, just get emissions done first. I think there are ways to do it with Procede and etc but I don't know how to do all that so I kept it simple by getting my emissions done first.

[triggz]

Yes, downpipes are the shit

[secretsquirrel]

I needs me some 3" dp's.

[bigdaddycane]

for states that don't perform the "sniffer test" and just go off the OBD-II port readings running kittyless downpipes will pass emmissions (with the proper DP fix) correct?

[michaelthepsycho]

Originally Posted by bigdaddycane

for states that don't perform the "sniffer test" and just go off the OBD-II port readings running kittyless downpipes will pass emmissions (with the proper DP fix) correct?

Should be.

But I personally don't like it when people fuck with emissions' equipment. Just no need and juvenile. So what if you get an extra 25 hp? There are other methods that don't further hurt the environment.

[ar design]

[UCF 335]

r u selling them?

[scottp999]

Originally Posted by vase330

Wait a minute man, are you saying you wont pass inspection with the AR downpipes on? Are you catless or catted? Please clarify. I hate to have them uninstalled. I do have the OEM originals, but not looking forward to having them swapped twice just for inspection.

With Procede you turn canclear off and set the o2 modifier value below 100%. Even with catted, sometimes after a year or so it will still throw the check engine light. For older catted aftermarket you could probably get away with an 80-90% o2 modifier setting. Some people with catless run a value of 50-60% for the o2 modifier.

If you don't have procede, or you don't have the o2 modifier hooked up with the procede (latest harnesses and updated harnesses), you can either change your harness to make the o2 modifier functionality work, or BMS offers wire in o2 fix (version 3) that is adjustable for about $80.

Beats that un-install and re-install labor.

[1BAD535]

Originally Posted by 5soko335i

The biggest difference in noticable power is not when the items are installed, its more than usually when there uninstalled

ya, i recently removed all my mods for a trip to dealer to get some stuff fixed, and what a difference, id had gotten used to my car being fast that i didn't think it was fast anymore, but now i know

[cn555ic]

Why the hell did you uninstall it in the first place??? To get an inspection? IF thats the case a simple 02 sims would have been better IMO...Less of a PITA

[tmaung]

Originally Posted by UCF 335

r u selling them?

Yup. Someone local mentioned he wanted it so I msged him today but if he backs out, I'll let you know.

Originally Posted by cn555ic

Why the hell did you uninstall it in the first place??? To get an inspection? IF thats the case a simple 02 sims would have been better IMO...Less of a PITA

Oh no. I just uninstalled them because I am selling the car and moving onto a newer 335i.

[secretsquirrel]

I got 2nd dibbs on them!

[M3 Eater]

I would keep the DPs till the end...however... when I took mine out for warranty work on the car, I was able to tune the car back close so the torque was the same or close. I had to start from scratch, reset the ecu... adaptions, etc and then tweak jb3 a bit for the new set up. I was running meth, dci and no dp's for a while and was happy with the cars performance with the stock DPs in. When I put them back in, it took a while to get them dialed in again but when I did..... I was surprised how much they did for the set up.

[sleepergm]

[335iCoupe1382]

Sounds awesome. I wanna get some DP's now but I also need a tune! Already have my new rims/tires and AFE intake kit...now I need some more power! How long is the installation? Also, as far as catted/cattless, what are the power and sound differences?

[1BAD535]

I'm curious too on power differences I want to get some hi flow catted,

[Bimmer This]

Originally Posted by 335iCoupe1382

Sounds awesome. I wanna get some DP's now but I also need a tune! Already have my new rims/tires and AFE intake kit...now I need some more power! How long is the installation? Also, as far as catted/cattless, what are the power and sound differences?

DP installation takes about 2-4 hours on "i" models and about 4-6 hours on "xi" models. I love the way DP's sound with a stock exhaust IMO.