335i Secondary Cat Delete Questions?

[Little Goliath (Daniel)]

Hi Fanatics

I would like to find out from the experts here, what are the benefits to secondary cat delete? the two on the mid pipe? on a 2007 E90 335i

Will it change the sound of the car?
Will it increase power?
Will it throw error codes?

 

[Brett6ll]

Morning bud,

Yes there is a change , slightly louder.
Restriction in the exhaust is mostly in the dp but you may benefit slightly from removing more but I think negligible unless they are blocked.
No codes whatsoever.

Just remember if your turbos are leaking, removing the cats will allow for some smoking.

 

[Little Goliath (Daniel)]

If I delete the cats and there is smoke, does that mean turbo seals need to be replaced?

 

[Brett6ll]

There are a few reason the car may smoke but the most likely reason with the n54 is turbos seals especially if they have done a good amount of mileage.

Having said that not all cars smoke, do you still have stock down pipes ?

 

[Little Goliath (Daniel)]

There are a few reason the car may smoke but the most likely reason with the n54 is turbos seals especially if they have done a good amount of mileage.

Having said that not all cars smoke, do you still have stock down pipes ?

Hi Yes stock dp's and primary cats are still in

 

[Kish2604]

Remove the secondaries and replace with free flow silencers/resonators else the drone will get annoying

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[hoosain]

Remove the secondaries and replace with free flow silencers/resonators else the drone will get annoying

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for some strange reason i have dp's and the stock back boxes with secondaries removed and fitted with a straight pipe and i have no drone whatsoever

 

[Kish2604]

On the e90 it drones like a mofo..

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[Little Goliath (Daniel)]

Maybe I should do the Cat Delete and drive for a week or two and check if I hear any droning that irritates me if indeed I do I'll add resonators

 

[Little Goliath (Daniel)]

I went in today to De Graaf undercar

He quoted me Yesterday, today I hear he gave me a quote where he keeps both the cats which was unacceptable, as this is a expensive part to put back when I need to sell the car in the future

Do any of you guys know a reliable place where I can remove the seconds Cats that does a nice job with the and can weld very neatly? I need it to look very neat

 

[Hubblyking]

I went in today to De Graaf undercar

He quoted me Yesterday, today I hear he gave me a quote where he keeps both the cats which was unacceptable, as this is a expensive part to put back when I need to sell the car in the future

Do any of you guys know a reliable place where I can remove the seconds Cats that does a nice job with the and can weld very neatly? I need it to look very neat

LOL so he's.going to fit the pipes and pay you the difference.:RedNo:
Some company's are just plain chancers.
There is p tech and speedspot in your area .

 

[Little Goliath (Daniel)]

I went in today to De Graaf undercar

He quoted me Yesterday, today I hear he gave me a quote where he keeps both the cats which was unacceptable, as this is a expensive part to put back when I need to sell the car in the future

Do any of you guys know a reliable place where I can remove the seconds Cats that does a nice job with the and can weld very neatly? I need it to look very neat

LOL so he's.going to fit the pipes and pay you the difference.:RedNo:
Some company's are just plain chancers.
There is p tech and speedspot in your area .

Thanks

Yes I told him there is no way in hell he's taking the cats those are bmw original parts and go at a hefty price second hand

 

[BeemerFanatic]

Tried Tmss?

 

[Little Goliath (Daniel)]

Tried Tmss?

Where are they? I am in Pretoria I saw them at Raceday will definitely use them when I have a day for myself again

 

[KrS24]

+1 for TMSS, well worth the drive to Roodepoort


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[akash]

I paid R300 at Supa Quick on Garsfontein Road.

I have an e90 2007 335i, no drone, no smoke, car is louder on cold start up.

 

[Woodies]

Why not do catless DP's first? I think the stock exhaust with catless DP sounds pretty good.
At least by doing DP you will get some good gains.

 

[ShaunB]

Do Downpipes first.

 

[RS135]

Go to Xflow/Xcede

They do these cars daily

 

[Little Goliath (Daniel)]

Hey guys thanks for the suggestions, I thought of doing DP's first but my budget is restricted at the moment after I bought Mags, Tyres and did the Center bearing on the propshaft last month (Also saving up for a JB4)

Will definitely try Excede or TMSS when I have funds and some free time