discussion Decat / downpipe no noise

[AshG108]

The cold start is there to warm up the CATS faster so if you go catless just get the cold start coded out since there is no point in cold starting at all anymore. I left mine on for personal preference only, the louder the better. Will be going straight out sometime this year, just looking for someone who needs the MPE.

Dude,
Straight pipe the car and keep your MPE please. I did mine and it was a great full system which was coupled from the DP also but damn, it got LOUD... I never set of alarms but with the straight pipe, it set of alarms at work, malls or any place that had slight enclosures.
But then comes the hum when cruising on the freeway. I eventually just kept the midpipe and fitted my backbox on again and the car was perfect.

You may prefer it but just keep the MPE until you 100% happy to keep the straight pipe

 

[Holiman]

The cold start is there to warm up the CATS faster so if you go catless just get the cold start coded out since there is no point in cold starting at all anymore. I left mine on for personal preference only, the louder the better. Will be going straight out sometime this year, just looking for someone who needs the MPE.

I might want that MPE...

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[Holiman]

Dude,
Straight pipe the car and keep your MPE please. I did mine and it was a great full system which was coupled from the DP also but damn, it got LOUD... I never set of alarms but with the straight pipe, it set of alarms at work, malls or any place that had slight enclosures.
But then comes the hum when cruising on the freeway. I eventually just kept the midpipe and fitted my backbox on again and the car was perfect.

You may prefer it but just keep the MPE until you 100% happy to keep the straight pipe

This... This was me. That drone. I drove to Polokwane. When I got there I decided f*CK it and put on a temp exhaust to come home so I can put on my stock box. Lol

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[Salt]

I might want that MPE...

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What are you driving now?

 

[Holiman]

What are you driving now?

F20 pwg M135i. I have dp and midpipe done by Rogue Performance, connected to the stock box. Still lekker but I yearn for the MPE sound note. Could do the back box mod but I'm in two minds about it

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[AshG108]

F20 pwg M135i. I have dp and midpipe done by Rogue Performance, connected to the stock box. Still lekker but I yearn for the MPE sound note. Could do the back box mod but I'm in two minds about it

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I had the backbox mod, that's why I still enjoyed mine... IMO it sounded better than the MPE and coupled with the midpipe and DP, it was near perfect. The mPE sounded a bit softer whereas the backbox mod was slightly louder with more bass to it and accentuated runoff.

 

[temashan]

Hi all. I'd like to ask for some advice. How clogged up does a petrol engine filter gets vs a diesel engine filter? Is it also a good idea to do a dp as the mileage increases to decrease back pressure on the turbo/engine? And if one did go this route, what are the options on the replacement. I wouldn't want the car to get any louder really. I see overseas high flow cats are available in 200 or 300 fell units. They do say sounds does get louder but I assume it's marginally louder vs the usual dp that gets installed. Essentially and hypothetically 😉 I'd like to do what's healthiee for the engine long term but not make the car loud. I also have an extended warranty on the car to take in to account. Advice welcome 😁

Hiya bud , I know this is an old thread just wanted to find out did you manage to get your hands on a high flow catted DP I’m also currently looking for one , currently have MPE back box on my 240i , want to get a High flow DP and hopefully not have to tune for CEL basically want to let things breathe more without having to tune if possible

 

[Salt]

Hiya bud , I know this is an old thread just wanted to find out did you manage to get your hands on a high flow catted DP I’m also currently looking for one , currently have MPE back box on my 240i , want to get a High flow DP and hopefully not have to tune for CEL basically want to let things breathe more without having to tune if possible

Nah...got a cat less dp fitted. No regrets.