125i/128i Exhaust Media Thread

[chris82]

Originally Posted by Kgolf31

My 3" Exhaust.

Burns Y-Pipe into a 100 Cell Cat -> Vibrant Bottle Resonator -> Borla XR-1 Muffler.

Dump at Rear Differential.

That's fucking race car right there. That car pulls like a mofo!

[Kgolf31]

Originally Posted by chris82

That's fucking race car right there. That car pulls like a mofo!

It's okay

[RyanDavies]

I read on the internet that your car would have no torque if you merged that far forward. So clearly you've edited that video and it is a lie.

[chris82]

Originally Posted by RyanDavies

I read on the internet that your car would have no torque if you merged that far forward. So clearly you've edited that video and it is a lie.

I see what you're doing there!

[F82tyler]

Just got this done

[derekh]

Originally Posted by V0lcum

Just got this done

So you have no mufflers or resonators at all then? Or is that the front muffler/resonator gone and the rear one still remains? Sounds great btw.

[F82tyler]

Originally Posted by derekh

So you have no mufflers or resonators at all then? Or is that the front muffler/resonator gone and the rear one still remains? Sounds great btw.

We left the cats, but just straight piped it basically from the second set of cats back. No mufflers or resonators.

[derekh]

Cool, hows the sound level? I can only assume there is some highway drone, is it really annoying or is it tolerable?

[Taskmaster]

Originally Posted by RyanDavies

I read on the internet that your car would have no torque if you merged that far forward. So clearly you've edited that video and it is a lie.

You know I've seen the dyno, right?
Keep talking shit, fact is I was right - I'll wait on your dyno. ;-)

[Taskmaster]

Originally Posted by chris82

I see what you're doing there!

Oh me too, so watch him copy inch for inch what Kgolf is doing, because he has so much faith in how things should be done. Just like everything else he post, zero real world experience, zero facts, and ZERO results.

I know I was right, the results speak for themselves.

[F82tyler]

Originally Posted by derekh

Cool, hows the sound level? I can only assume there is some highway drone, is it really annoying or is it tolerable?

The drone isn't too bad, it's only annoying at 80+.

[derekh]

Originally Posted by V0lcum

The drone isn't too bad, it's only annoying at 80+.

Thanks, just trying to get some ideas. exhaust will definitely be my first mod when i pick up my 128.

[F82tyler]

Originally Posted by derekh

Thanks, just trying to get some ideas. exhaust will definitely be my first mod when i pick up my 128.

It's the best thing I've done so far and the cheapest.

[Kgolf31]

Fast forward to about :45 seconds to see my car:

[Suhb]

Originally Posted by andrey_gta

Where will the placement be? As it needs to catch the sound wave.

Thinking of replacing the secondary cats with AR20's in their place. Seems like the best place to fit them and also increase flow a little. Only afraid of more fumes.

From what I read on the e46 forums, two AR20's remove all rasp and the rest of the exhaust has no resonator. So I figure if the AR20's serve their purpose, I will either hack off the stock resonator or replace it with SS pipes.

If I'm in over my head, someone call me out before I waste my money

[jaximointhecut]

Originally Posted by V0lcum

It's the best thing I've done so far and the cheapest.

how much was it? Had my resonators deleted but kept the mufflers and i didn't like it too much. Your car sounds great though, I'll give it another shot.

[F82tyler]

Originally Posted by giannski

how much was it? Had my resonators deleted but kept the mufflers and i didn't like it too much. Your car sounds great though, I'll give it another shot.

Thanks dude, the cost of the resonator delete / muffler was $150

[chris82]

Originally Posted by Suhb

Thinking of replacing the secondary cats with AR20's in their place. Seems like the best place to fit them and also increase flow a little. Only afraid of more fumes.

From what I read on the e46 forums, two AR20's remove all rasp and the rest of the exhaust has no resonator. So I figure if the AR20's serve their purpose, I will either hack off the stock resonator or replace it with SS pipes.

If I'm in over my head, someone call me out before I waste my money

You may increase flow but the secondary cats are likely a very low cell cat so I'm not sure how much of a gain you'll get out of just replacing them with AR20 resonators but if it's just a reduction in rasp you're after I have no experience with those parts.

[jaximointhecut]

Yeah buddy

[Suhb]

Hey Chris, tried to message you about the 135i exhaust. Your inbox is full.

[chris82]

Originally Posted by Suhb

Hey Chris, tried to message you about the 135i exhaust. Your inbox is full.

Sorry, I saw that, just deleted a ton of messages so please resend!

[asbrr]

Originally Posted by Suhb

Here is a cold start, warm idle and some pulls I did with the AA headers and PE exhaust. First pull is medium throttle. Second pull is WOT. You can hear the rasp on deceleration I've been talking about around the 45 second mark. It's around 5500 down to 4500 and annoyed me to no end.

The in cabin video is a lot quieter than in real life. The drone doesn't sound too bad, but trust me, it's there. I wouldn't recommend this set up for daily driving.

Today I put on a 135i muffler with the vacuum line attached and wow is the car quiet. I'd say it's around 25-30% louder than a full stock 128i exhaust and quieter than just a PE exhaust. The car is also less stinky in the rear. I'll see if I can get some videos with it. I guess the middle ground between these two is the AA muffler. If only we could get our hands on it

Could you PLEASE post some vids with the 135 exhaust? I've been searching forever for someone with this combo and it's hard to get any ideas. I currently have the 135 muffler with the vacuum line plugged (golf tee mod) and it's a nice improvement from stock 128. Deep tones below 3K rpm, some light burbling and popping on the overrun, and no drone whatsoever. I feel like adding the AA headers will give it a slight edge but still be very civilized.

Try plugging the vacuum line you'll gain a bit more sound and character, you might like it that way. But please post a video if you can either way! Thanks!