Custom 325i exhaust - help?

[rwh11385]

http://www.magnaflow.com/02product/shopexd.asp?zone=main&id=407

or

http://www.magnaflow.com/02product/shopexd.asp?zone=main&id=646

or

http://www.cardomain.com/item/DYX17758

muffler
what is the right length? and width?

http://www.magnaflow.com/02product/shopexd.asp?zone=main&id=1438

or
http://www.flowmastermufflers.com/pr...oducts_id=4035
or
http://www.borla.com/products/produc...ullet+Mufflers
resonator
length that will fit? a foot will be fine right? or want longer?

2.5" tubing all the way, and a good smooth Y-pipe after the exhaust manifolds. http://www.performance-curve.com/bro...--Dual-2-.html or better?

thanks for the input. leaky rusted stock exhaust is no good anymore

[MR 325]

I'd go with muffler number 1 and resonator number 2.

[FredK]

Are you going for raucous inline six noises? Because if you go with #1 you will get a LOT of volume. It has a fairly small can. Also, the Flowmaster Hushpower is a fairly small volume resonator. I'm fairly certain a 22" long can will fit.

[rwh11385]

Are you going for raucous inline six noises? Because if you go with #1 you will get a LOT of volume. It has a fairly small can. Also, the Flowmaster Hushpower is a fairly small volume resonator. I'm fairly certain a 22" long can will fit.

maybe, not sure. what about this? http://www.magnaflow.com/02product/s...ne=main&id=848
that's larger but what would be too large?

and where is a longer magnaflow/flowmaster similar type long resonator or straight muffler that could be used.

but the general idea is on the right path, correct?

[FredK]

Yep, you're definitely on the right track. I'm no exhaust expert, I've only made one exhaust so far and it is LOUD. However, the aftermarket cans are designed to be loud, so the smaller you go, the louder it's going to be.

Magnaflow has a whole lineup of looong round 4" can mufflers that could do a good job as a resonator. This looks pretty good:

http://www.magnaflow.com/02product/shopexd.asp?zone=main&id=506

The Magnaflow 10436, 22" length 4" round muffler.

[rwh11385]

ahhh. didn't see the link at the top for round satin stainless mufflers. awesome, cheers mate. with a muffler, resonator and y-pipe all from magnaflow it should be pretty cheap and easy to replace my farty can.

[FredK]

Ya know, I like the look of the Flowmaster Y-collector better. The Magnaflow piece looks like a stamped piece of metal, whereas the Flowmaster is a true welded merge pipe. It's like $42.

http://www.jegs.com/webapp/wcs/store...0002_695228_-1

[rwh11385]

that does look like a better design. sweet.

[atomic]

I just wanted to check the update on what you are doing or have done with your exhaust. I have a 325i as well and am at a crossroads as to what to do about an exhaust....

[rwh11385]

I have a loud, leaking stock 325i exhaust right now...

[atomic]

cool me too I was just wondering if you had done anything from this post yet but I guess not. Although the load leaky exhaust doesnt sound bad I am sure as mine does not..... But sooner or later it's got to be replaced since it will fall apart like a pos

[Emre]

2.5" tubing all the way, and a good smooth Y-pipe after the exhaust manifolds.

If you have any info, please share it!

I'm looking to do something similar on my M20B25 powered track car. I've got a set of Hartge long-tube headers (2X 3-into-1). I want to combine them into a single 2.5" exhaust line. Trying to figure out where along the line to place the Y-pipe.

Emre