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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Downpipe Install Advice



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      01-01-2013, 03:20 AM   #1
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Downpipe Install Advice

For Christmas my wife got me Raceland DPs so I decided to take a stab at the install myself and have came to an impasse. Basically I'm pretty sure the front DP has some sort of fitment issue. The rear went on perfectly.

No matter what I do I cannot get the front DP to line up. As a matter of fact, to even get the connection to the cats close, the front and rear O2 sensors are actually touching (see pic). But still that doesn't give me enough room to get both bolts through the connection to the cats (see pic).

If I remove the O2 sensor nearest the front turbo I can get the connection to the cats bolted up but due to the angle of the O2 sensor bung I cannot get it back in because the rear O2 sensor is in the way. I can't remove the rear O2 sensor and put the front in because I'll have no access to get the rear in... make sense?

Basically no matter which side I bolt up first (turbo or cat) I always come up about a 1/4" or so short to make the DP fit.

So I guess what I'm is if anyone has had a similar experience with RL DPs? Would you guys suggest I send them back and get a refund? Is the O2 sensors resting on each other bad?

I know there have been fitment issues in the past but through all my research it seemed the new management at RL had cleared most of that up. Needless to say I'm second guessing my purchase.

Any help is much appreciated!
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      01-02-2013, 01:05 PM   #2
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You do not want them touching. You should expect better fitment. Ask them for a replacement. The only downside to the "ebay" or "overseas" pipes is the chance they might not fit.

If you are handy you can throw the downpipes in a vice, heat up the o2 sensor bung and push it in so it angles the o2 sensor bung away. In essence you will be denting your downpipe with a small dimple to gain some clearance at the bung area. That is the easy way out if you are handy.

Keep in mind if you mess up the downpipes are toast and the manufacturer will not warranty them. Do this at your own risk. It's been done successfully by me and other shops.
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      01-02-2013, 04:04 PM   #3
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Thanks for the advice, Jeff! I actually got everything squared away (after several hours of wrestling with the DP) and the O2 sensors not touching and the connection to the mid pipe lined up fine. It wasn't easy and I hope to never do it again anytime soon!
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      01-03-2013, 09:01 AM   #4
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She got you raceland... She doesn't love you.
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      01-03-2013, 09:19 AM   #5
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Quote:
Originally Posted by aph335i View Post
She got you raceland... She doesn't love you.

my gf got me a scarf when i asked for a m3 steering wheel. His gf loves him alot in my eyes. :P
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      01-03-2013, 10:06 AM   #6
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Quote:
Originally Posted by aph335i
She got you raceland... She doesn't love you.
Not funny
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      01-03-2013, 10:12 AM   #7
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Quote:
Originally Posted by aph335i View Post
She got you raceland... She doesn't love you.
Better than what i got from my gf

Quote:
Originally Posted by demontwinz View Post
my gf got me a scarf when i asked for a m3 steering wheel. His gf loves him alot in my eyes. :P
I asked for the 1/18 model of my car... and got a toaster oven...
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      01-03-2013, 10:13 AM   #8
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Lol okay she loves you.
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      01-03-2013, 03:46 PM   #9
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Wish my gf got me stuff for my car lol
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      01-03-2013, 04:26 PM   #10
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my gf got me a air freshener thing in this glass globe with LED lights, I dont' drive a CIVIC!!

She thought it was cute .. i refused to install it onto my dash .. she got sad .. LOL



i think we got off topic .. LMAO
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