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#1 (permalink) Old 06-28-2003, 11:41 AM
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really about to display by bmw ignorance ...

i am wondering if my exhaust has been modded. i have the '97 328is, 2 door coupe. from the block back, it has 2 large (didn't measure, but they look at least 2 1/2", possibly 3") stainless pipes from the header, through a set of cats, then, after the cats, they shrink, are black, and go into what looks like the stock muffler, which has dual black, rounded rectangular tips. also, is that an emissions monitoring thingy plugged into the right exhaust tip? looks like a little sending unit, wired into the tip ...

Bear with me, I'm learning! This is my first foreign car, and boy is there a lot more engineering put into it!

thanks!

1997 328is
black and tan
bone stock, for now!
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#2 (permalink) Old 06-28-2003, 01:20 PM
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no clue...but what are rounded rectangular tips?

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#3 (permalink) Old 06-29-2003, 12:58 AM
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lol, yeah, I suck at descriptions ... tip shape looks like this, only dual tips and black

http://www.nikis-place.com/main.asp?action...6&partnr=29033#

1997 328is
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bone stock, for now!
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#4 (permalink) Old 06-29-2003, 05:58 AM
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Quote:
Originally posted by future3?@Jun 29 2003, 10:21 AM
really about to display by bmw ignorance ...

i am wondering if my exhaust has been modded. i have the '97 328is, 2 door coupe. from the block back, it has 2 large (didn't measure, but they look at least 2 1/2", possibly 3") stainless pipes from the header, through a set of cats, then, after the cats, they shrink, are black, and go into what looks like the stock muffler, which has dual black, rounded rectangular tips. also, is that an emissions monitoring thingy plugged into the right exhaust tip? looks like a little sending unit, wired into the tip ...

Bear with me, I'm learning! This is my first foreign car, and boy is there a lot more engineering put into it!

thanks!
that thingy in the right hand pipe should be a vacume operated flap that opens and closes when you boot it, its eigther to reduce noise around town or increase back pressure..... one or the other.
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#5 (permalink) Old 06-29-2003, 06:43 AM
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that makes sense, thanks. there is a flap in the tips right by that connectoin. is that part of it stock? i'm assuming it is.

thx.

1997 328is
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#6 (permalink) Old 06-29-2003, 06:46 AM
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i think its stock

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 06-29-2003, 06:52 AM
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hmmm, that means that will have to go ...

thanks guys.

1997 328is
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bone stock, for now!
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#8 (permalink) Old 06-29-2003, 07:00 AM
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Originally posted by future3?@Jun 30 2003, 05:32 AM
hmmm, that means that will have to go ...

thanks guys.
i had one on my 328i, just remember to block the rubber pipe up, so it doesnt suck up any crap.....
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#9 (permalink) Old 06-29-2003, 08:17 AM
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cool. i was implying that i just need to upgrade the whole system ... but you're saying i can unplug the vacuum thing in the interim? might give that a shot and see what happens ...

Thanks.

1997 328is
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bone stock, for now!
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#10 (permalink) Old 06-29-2003, 08:27 AM
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Quote:
Originally posted by future3?@Jun 30 2003, 06:57 AM
cool. i was implying that i just need to upgrade the whole system ... but you're saying i can unplug the vacuum thing in the interim? might give that a shot and see what happens ...

Thanks.
the flap works by a vacume..... when you boot it the flap opens.. so if you disconect the pipe it stays shut! i only know as i changed my exhaust for Hamann motor sport.....

have a look at my link below and you can see it!
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#11 (permalink) Old 06-29-2003, 09:00 AM
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oops. LOL, guess I'll leave that there for now and just wait for an upgrade. Your ride looks sweet by the way, i'll look into that Hamann!

B)

1997 328is
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#12 (permalink) Old 06-29-2003, 09:15 AM
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Originally posted by future3?@Jun 30 2003, 07:40 AM
oops. LOL, guess I'll leave that there for now and just wait for an upgrade. Your ride looks sweet by the way, i'll look into that Hamann!

B)
Thanx

it gives off a very deep throaty noise, and pops as you decelerate. it kicks out 97db at 4500rpm......... sounds the dogs danglies....
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#13 (permalink) Old 06-29-2003, 03:33 PM
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sounds like a stock exhaust. if the vaccumm is still attached then thats probably what it is. it creates backpressure at lower RPM's to give the car a little more power, then reopens the right exhaust pipe to give the more disired freeflow.

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