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E36 General discussion and technical help for (E36) 1992-1999 3 series cars. 318, 323, 325, 328.

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Old 04-26-2007, 08:33 PM   #1
Chad...

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6-cyl headers

has anyone here installed OBX headers, or any other headers? (specifically on a 325i sedan)
I'm thinking about purchasing some but want to know what kind of power increse and tourque decreases you get. Also, how difficult are they to install?
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Old 04-26-2007, 11:33 PM   #2
B_w.

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Quote:
Originally Posted by Chad...
has anyone here installed OBX headers, or any other headers? (specifically on a 325i sedan)
I'm thinking about purchasing some but want to know what kind of power increse and tourque decreases you get. Also, how difficult are they to install?

isnt obx that cheap shit on ebay?
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Old 04-27-2007, 02:00 PM   #3
Chad...

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yeah, I'm 16 and only have $2500
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Old 04-27-2007, 02:19 PM   #4
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don't waste your money. BMW cast exhaust is pretty efficient. A better investment would be a chip, intake & CAI.
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Old 04-27-2007, 02:37 PM   #5
B_w.

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if you want better flowing headers obd2 are an improvement over obd1. i have 2 pairs of obd2 headers sitting around...
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Old 04-27-2007, 02:47 PM   #6
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Quote:
Originally Posted by Chad...
yeah, I'm 16 and only have $2500

From experience, save your money. Do you really need cheap headers? Nah. When you're older you'll look back and say, "Damn that was the stupidest thing I ever spent my money on."

I know, I've done it too much.
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Old 04-27-2007, 05:36 PM   #7
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Good points, I already have a custom cold/ram air intake, M3 catback exhaust, a dinan chip, custom front strut bar, M3 springs, rotors, pads, and braided brake lines, and a pretty complete 98' conversion. So I guess I'll get a sterio or do an M3 styling conversion.
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Old 04-27-2007, 05:41 PM   #8
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Originally Posted by B_w.
if you want better flowing headers obd2 are an improvement over obd1. i have 2 pairs of obd2 headers sitting around...
are they very effective?
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Old 04-27-2007, 05:58 PM   #9
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if you port them a bit more, yeah. You just have to weld something over one of the 02 sensors on it I think as it is an OBD 2 header.

The SS auto chrome headers dont seem that bad, there is a group buy on those, or something pretty similar over on bimmerforums. I was thinking about getting them if it is worth it..
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Old 04-27-2007, 06:01 PM   #10
B_w.

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Quote:
Originally Posted by Chad...
are they very effective?
they flow more than obd1...

i know they have to be slighly modified to work with obd1...i think it may just be having some of the o2 sensor bungs welded shut....obd2 has 4 o2 sensors vs 2? on obd1. other than that i believe everything else lines up the same.
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Old 04-27-2007, 06:03 PM   #11
B_w.

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Originally Posted by 94bmw325i
if you port them a bit more, yeah. You just have to weld something over one of the 02 sensors on it I think as it is an OBD 2 header.

The SS auto chrome headers dont seem that bad, there is a group buy on those, or something pretty similar over on bimmerforums. I was thinking about getting them if it is worth it..
ss auto chrome is junk...unless you can weld and repair them yourself when they crack dont buy em...as for how well they flow
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Old 04-28-2007, 11:41 PM   #12
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anytime you open your exaust up it will always take away from your low end torque. however it will give you more in the top end. but if you get headers then dont get cheap ones. but i think everybody else already said that.
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Old 04-30-2007, 12:27 AM   #13
94bmw325i
 
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Originally Posted by B_w.
ss auto chrome is junk...unless you can weld and repair them yourself when they crack dont buy em...as for how well they flow
now that I think about it, the ones in the group buy are actually the supersprint replica headers, those arent the ss auto ones are they?
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Old 04-30-2007, 03:38 AM   #14
B_w.

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Originally Posted by 94bmw325i
now that I think about it, the ones in the group buy are actually the supersprint replica headers, those arent the ss auto ones are they?
i honestly dont know
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Old 05-03-2007, 11:26 AM   #15
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haha Chad you and my younger bro should be friends, he just bought a 92 Bmw 318I, where you from
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