Author Topic: Cat-back options (Read 2544 times)

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..

cagedbunny · « **Reply #1 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;

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

Hodge · « **Reply #2 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.

AcSchnitzer318is · « **Reply #3 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.

Hodge · « **Reply #4 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.

AcSchnitzer318is · « **Reply #5 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...