Re: bmw-digest V9 #141

[rusmaster <rusmaster@xxxxxxxxxxxxx>]

Hi Kurt,
	I believe the difference is in the material and BMW part cost.  I believe the
stuff the muffler guy would use is not Stainles Steel.  The stuff thats OEM or
equivalent is SS.  Ask your guy how much a SS system cost to put on?  I bet
theres a big difference.  You'll bet the SS system will last alot longer also?

The single pipe conversion is fine as long as it's big enough to handle the
exhaust load.  I think the OEM 2-2.25" pipes are the same flow as 3.5" single
pipe.  It's around that size.  The change in back pressure will only effect
low end torque a little.  If it's less restrictive, the top end will work
better, but low end suffers ever so slightly.  Where do you wan't the power?

Take Care,
Russ
535iS  heavily Dinazized


> 
> Date: Fri, 04 Sep 1998 18:11:17 -0700
> From: K F Martin <kfmartin@domain.elided>
> Subject: E28 exhaust
> 
> Hoping that someone who has been down this road can advise me...
> I have an '87 535is.  The exhaust system is now pretty well shot
> from head to tailpipe.  I took the car to a local guy to check
> the damage and ask his opinion.  This guy is well-known for his
> good exhaust work; hes honest, inexpensive, and he did a great
> job on my vw golf last year.  He suggested that I use an exhaust
> that he will custom fabricate, using stock components...and using
> a y-pipe that will convert to a single exhaust the whole way back.
> I told him I wasnt interested in doing that, having some serious
> reservations because I imagine this car to be very sensitive to
> back-pressure changes.  I've since priced the exhaust in the BMP
> catalog...its about a thousand dollars in parts, plus installation.
> The mechanic's alternative would be about two hundred, installed.
> I guess this could offend some purists, but this is enough money
> for me to think twice about it.  so im thinking.  can anybody help?
> Id greatly appreciate any input.  (gotta decide by tuesday)
> thank you much.
> kurt.

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