M42club.com - Home of the BMW E30/E36 318i/iS

DISCUSSION => Engine + Driveline => Topic started by: cagedbunny on November 11, 2008, 08:30:39 PM

Title: Cat-back options
Post by: cagedbunny on November 11, 2008, 08:30:39 PM

Just wondering what folks are running for exhausts on your M42 E30s?  Doesn't seem to be a lot of aftermarket options out there specifically for the 4-banger cars, and I'm kind of opposed to dropping $500+ for a Supersprint.

Anyone running a good homebrew set-up?  I was thinking of getting some 2 1/4 pipe, some mandrel bent sections, and maybe a Borla muffler, and letting a local shop weld it up..

Title: Cat-back options
Post by: cagedbunny on November 11, 2008, 08:32:01 PM

Since this was my first post, I'll go ahead and post a picture of the newly purchased faded-glory;

(http://img.photobucket.com/albums/v165/GTiRacer53/318is/P1020132.jpg)

Lots of work to do, but I'm in love with the ratty little thing  :D

Title: Cat-back options
Post by: Hodge on November 11, 2008, 08:40:32 PM

Alot of people run Magnaflow mufflers too.


I think custom is probably the way to go on M42 cars.

Title: Cat-back options
Post by: AcSchnitzer318is on November 11, 2008, 10:50:43 PM

I'm going to do ebay SS replacement header (not longtube), magnaflow hi flow cat, resonator, and magnaflow muffler.  Hopefully that will eliminate any rasp and still free up 1 or 2 ponies.  Main reason I'm doing it is my header or collector has an exhaust leak that is driving me nuts.

Title: Cat-back options
Post by: Hodge on November 12, 2008, 07:52:23 AM

How do you know it has a leak?

Does it make a noise?

Cause I have a high-flow cat, glasspack, and magnaflow muffler and it's pretty raspy.

I know you want a resonator, and maybe that will help.

Title: Cat-back options
Post by: AcSchnitzer318is on November 13, 2008, 11:43:56 PM

It makes a noise at a certain RPM... like 3000 to 5000... after 5000 the engine is loud enough to drown it out.  Sounds great below that point for the most part.  I can hear the leak from around the collector/header area if I get under my car and listen for it.  If I heard it from the exhaust then I would just say that's the way the motor is supposed to sound...