Removing my secondary cats and resonator

[RabbidSasquatch]

Yesterday I went to get a quote for straight pipes from where my secondary cats are to my oem exhaust and they wanted to charge me $350 for a custom y pipe and installation, does this sound reasonable, or does any else know of any custom muffler houses in Colorado?

[startover]

Are any advantages/disadvantages over cutting off secondary cats vs. N55 midpipe swap? If anything, I assume the N55 midpipe should look better since it's OEM?

[parky1215]

With that much cost, I would rather go with aftermarket midpipe.
You can't guarantee what kind of job they will do on your midpipe.

[thebigragu99]

If that to remove the rear cats,tig weld,piping included,and a ypipe??The gains are maybe around 14 whp and faster spool.

[busyguy8]

Originally Posted by thebigragu99

If that to remove the rear cats,tig weld,piping included,and a ypipe??The gains are maybe around 14 whp and faster spool.

IF they tig it.. most muffler shops will mig it together...

[thebigragu99]

Originally Posted by busyguy8

IF they tig it.. most muffler shops will mig it together...

tig is the best for s.s

[busyguy8]

Originally Posted by thebigragu99

tig is the best for s.s

I know this. I'm stating that most muffler shop don't tig though.

[RabbidSasquatch]

I set an appointment to get it done this friday so hopefully ill post a vid up shortly after its done

[HP Autosport]

Originally Posted by RabbidSasquatch

Yesterday I went to get a quote for straight pipes from where my secondary cats are to my oem exhaust and they wanted to charge me $350 for a custom y pipe and installation, does this sound reasonable, or does any else know of any custom muffler houses in Colorado?

That is not a bad price, but make sure the Y-section is made properly otherwise you will have more restriction than OE and defeats the purpose of the mod in the first place.

Alternatively, you can get a Berk mid-pipe for $599 with better sound and more performance for your N54 135i.

[Dackelone]

Originally Posted by startover

Are any advantages/disadvantages over cutting off secondary cats vs. N55 midpipe swap? If anything, I assume the N55 midpipe should look better since it's OEM?

The stock N54 mid pipes are like $2K new from BMW!
The stock N55 mid pipes(with no secondary cats!) is around $400.

The main benifit on a N54 car - using the N55 pipe would be faster (turbo)spool up, more sound and more power(HP).

Personally I would not let anyone cut up you OE mid pipes with cats. It could cost you some serious $$$ down the road, IF you ever needed to put the car back to "stock".

[icabod7]

Originally Posted by HP Autowerks

That is not a bad price, but make sure the Y-section is made properly otherwise you will have more restriction than OE and defeats the purpose of the mod in the first place.

Alternatively, you can get a Berk mid-pipe for $599 with better sound and more performance for your N54 135i.

Is the Berk midpipe even less restrictive than the stock N55 midpipes without the secondary cats?

[RabbidSasquatch]

Originally Posted by Dackelone

The stock N54 mid pipes are like $2K new from BMW!
The stock N55 mid pipes(with no secondary cats!) is around $400.

The main benifit on a N54 car - using the N55 pipe would be faster (turbo)spool up, more sound and more power(HP).

Personally I would not let anyone cut up you OE mid pipes with cats. It could cost you some serious $$$ down the road, IF you ever needed to put the car back to "stock".

Why? wouldn't they just re-weld the stock pieces back together, I imagine they would just charge me labor that time since they aren't building anything, so most likely i think it would cost $150 at most