[Penn999]

Originally Posted by **335i**

i think its the stock bumper and remus sport nice done, you no need to paint look here

Thats exactly what I would do if i got quads. It looks cleaner than that piece of plastic on the mtech IMO.

[**335i**]

hope to order remus race quads and leave all other stock dps and all stock piping hope sound will be good and maybe gain some performance anyways mufflers are aftermarket so i should gain some power the guy made on aftermarket diffuser http://www.dmkoehnlandscaping.com/Po...NSTALLED_4.jpg hope to do it also on stock will look nice and clean

[Penn999]

Originally Posted by **335i**

hope to order remus race quads and leave all other stock dps and all stock piping hope sound will be good and maybe gain some performance anyways mufflers are aftermarket so i should gain some power the guy made on aftermarket diffuser http://www.dmkoehnlandscaping.com/Po...NSTALLED_4.jpg hope to do it also on stock will look nice and clean

You will get a sound change, but in terms of performance...it wont be a whole lot. You need to delete cats or at least go high flow cats. Bigger piping from the turbo all the way to the tips and cat deletion and or high flow cats are the only "noticeable" gains that will be achieved with an exhaust modification.

[**335i**]

Originally Posted by Penn999

You will get a sound change, but in terms of performance...it wont be a whole lot. You need to delete cats or at least go high flow cats. Bigger piping from the turbo all the way to the tips and cat deletion and or high flow cats are the only "noticeable" gains that will be achieved with an exhaust modification.

so u think that stocl pipes is uselles even if i delete second cats and change dps?

[Penn999]

Originally Posted by **335i**

so u think that stocl pipes is uselles even if i delete second cats and change dps?

No, they are fine. You must delete cats or get high flow cats if you retain the stock pipes in order to see any noticeable gain. These remus tips are only mufflers(sound and look only). If you get catless downpipes and delete secondary cats and get the remus tips you will be good until about 500-600whp or so. Backpressure become an issue then. More hp the wider the pipes need to be.

[**335i**]

Originally Posted by Penn999

500-600whp

not going into so high so i suppose stock pipes are okay

[Penn999]

Originally Posted by **335i**

not going into so high so i suppose stock pipes are okay

yup

[**335i**]

aa about that electronic valve (rear left exhaust in a passengers side) as i understand it becomes uselles after u install aftermarket exhaust....u need just zip tie it right

[Penn999]

Originally Posted by **335i**

aa about that electronic valve (rear left exhaust in a passengers side) as i understand it becomes uselles after u install aftermarket exhaust....u need just zip tie it right

I wouldnt zip tie anything in the exhaust, as it would probably melt. I dont know much about the electronic valve because I got rid of it a long time ago. Exhaust was my first mod. I know its meant keeping exhaust decibles down during startup, are you talking about the golf tee mod?

[**335i**]

Originally Posted by Penn999

I wouldnt zip tie anything in the exhaust, as it would probably melt. I dont know much about the electronic valve because I got rid of it a long time ago. Exhaust was my first mod. I know its meant keeping exhaust decibles down during startup, are you talking about the golf tee mod?

yes because as aftermarket mufflers dont have it so how you did when u installed your exhaust where you hide that tube that goes into a rear left exhaust (stock) i also saw that even aftermarket exhaust has that valve http://www.e90post.com/forums/showth...hlight=exhaust wonder why its still necessary

check attachment (red arrow in section 3)

also another picture (check pink color and CIRCLE in GREEN) its some kind of resonator?

[Penn999]

It looks like the x-pipe is used to soften vibration noises from the stock exhaust. It performs LIKE a resonator but it is not one. Its just reinforcement for the pipes at the mid-point. The longer the pipe without reinforcement like that the more vibration you will get. I dont know much about the valve, I dont think it is needed. I have been without one for 20k+ miles with no issues. I think its mainly for noise restriction on startup and when you arent WOT. The stock one opens during WOT

[**335i**]

Originally Posted by Penn999

It looks like the x-pipe is used to soften vibration noises from the stock exhaust. It performs LIKE a resonator but it is not one. Its just reinforcement for the pipes at the mid-point. The longer the pipe without reinforcement like that the more vibration you will get. I dont know much about the valve, I dont think it is needed. I have been without one for 20k+ miles with no issues. I think its mainly for noise restriction on startup and when you arent WOT. The stock one opens during WOT

so where you put that hose?

[hipnotic]

so should i go with deleting secondary cats and keeping everything else stock or doing a muffler delete?

[Bakeme521]

I now have a muffler delete and catless DP's and I LOVE it. Yes it is a bit loud but it sounds so mean, I will make a video tomorrow.

[Forcefed3]

Originally Posted by Bakeme521

I now have a muffler delete and catless DP's and I LOVE it. Yes it is a bit loud but it sounds so mean, I will make a video tomorrow.

Does it drone? Also, can you take a picture of it?

[Bakeme521]

Originally Posted by gbreeE90

Does it drone? Also, can you take a picture of it?

Yes it does, not unbearable though. And yes I will tomorrow.

[**335i**]

Originally Posted by Bakeme521

I now have a muffler delete and catless DP's and I LOVE it. Yes it is a bit loud but it sounds so mean, I will make a video tomorrow.

yes please make video

[hipnotic]

video please. How much did it cost for install and labor?

[Bakeme521]

You asked for it, so here it is. TURN IT UP!

And here's some pictures of my custom muffler delete done by me, I can swap in magnaflow mufflers any time in about 5 min.

[Bakeme521]

Originally Posted by josh06lau

video please. How much did it cost for install and labor?

I did all the work myself so I can't give you a def answer there. My friends muffler delete at a local shop cost him 150.

[hipnotic]

does the straight pipe that you added go inside or outside of the muffler? And how about on the other side does it go inside or outside or does this not matter?

[Bakeme521]

Originally Posted by josh06lau

does the straight pipe that you added go inside or outside of the muffler? And how about on the other side does it go inside or outside or does this not matter?

There is no mufflers, I'm not really understanding your question.