325is Header Installation? - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

 
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#1 (permalink) Old 11-22-2004, 05:49 PM
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i just got a header for my 94 325is and i heard that you have to do without the cats, is that true? what am i supposed to get to replace them? could i just go straight pipes from my header back, and have no o2 sensor? do you absolutely need the o2 sensor? how many o2 sensor(s) do i have? how long does installation of a header take? will someone who has knowledge of modding bmw's explain this all to me?

im bolting on a 95 m3 exhaust at the same time, if that has anything to do with the questions

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mods: intake, m3 exhaust, chip, carbon fiber hood and emblems, clear corners, reverse indiglo gauges
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#2 (permalink) Old 11-22-2004, 08:24 PM
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i talked to dave at obx and he said theyre header has a downpipe so i can keep my cats, he also said this was a direct bolt up, so lets hope

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mods: intake, m3 exhaust, chip, carbon fiber hood and emblems, clear corners, reverse indiglo gauges
stereo: panasonic touch screen, polk component set in q logic kick panels, kicker 5 channel amp, 12&quot; kicker square
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#3 (permalink) Old 11-22-2004, 09:07 PM
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cool so maybe you could be the first to post a diy on it also post sound clips

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#4 (permalink) Old 11-22-2004, 09:14 PM
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its a pain in the ass to do...not a whole lot of room in the engine bay to work with. and your car has 1 02 sensor and your car might make more power without the 02 sensor...but your fuel economy will go to hell.

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#5 (permalink) Old 11-22-2004, 09:21 PM
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im keeping the o2 sensor on, about how many hours of work, about how much will a shop charge

<a href='http://img136.exs.cx/my.php?loc=img136&image=bmwcopy3kb.gif' target='_blank'><img src='http://img136.exs.cx:81/img136/8032/bmwcopy3kb.th.gif' border='0' alt='user posted image' /></a>
mods: intake, m3 exhaust, chip, carbon fiber hood and emblems, clear corners, reverse indiglo gauges
stereo: panasonic touch screen, polk component set in q logic kick panels, kicker 5 channel amp, 12&quot; kicker square
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#6 (permalink) Old 11-22-2004, 09:30 PM
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Quote:
Originally posted by 325is1994@Nov 22 2004, 08:21 PM
im keeping the o2 sensor on, about how many hours of work, about how much will a shop charge
[snapback]235589[/snapback]
as far as how many hours of work...how proficient are you with tools? a friend of mine got it done for like 150. oh and it took my friend like 4+ hours to do the headers simply because there is very little room to work with.

93 325is - SOLD (white car in sig)
92 325i - 220rwhp/205rwtq (RIP)
02 GSXR 600 - 107rwhp/48rwtq
95 M3 - 220rwhp/205rwtq
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#7 (permalink) Old 11-22-2004, 10:47 PM
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how does your friends car sound? what exhaust does he have it paired with? did he notice any noticeable performance gains?

<a href='http://img136.exs.cx/my.php?loc=img136&image=bmwcopy3kb.gif' target='_blank'><img src='http://img136.exs.cx:81/img136/8032/bmwcopy3kb.th.gif' border='0' alt='user posted image' /></a>
mods: intake, m3 exhaust, chip, carbon fiber hood and emblems, clear corners, reverse indiglo gauges
stereo: panasonic touch screen, polk component set in q logic kick panels, kicker 5 channel amp, 12&quot; kicker square
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