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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > Evolution Racewerks N55 Catless Downpipes
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      04-20-2013, 12:10 PM   #1
DanielChangg
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Evolution Racewerks N55 Catless Downpipes

Will Catless down pipes make the stock 335 exhaust sound better/deeper?

Also can you do this to a leased car?
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      04-20-2013, 05:07 PM   #2
GET A GUN
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The sound will be awesome.
You will need JB4 to bypass the check engine light you will get from it.
Easy to swap in and out.
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      04-20-2013, 05:44 PM   #3
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Quote:
Originally Posted by GET A GUN View Post
The sound will be awesome.
You will need JB4 to bypass the check engine light you will get from it.
Easy to swap in and out.
but the jb4 isn't available for the f30 yet, correct? so the CEL will most likely be on with these, but the mod is def worth it!

Will sound louder, and be faster. Altough i wonder what happens if the CEL is on with catless, will the car run more rich / lean? or just the light is on
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      04-20-2013, 08:25 PM   #4
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The JB4 stage 1 is on the website and you can upgrade to stage 2 once you get that by e-mailing the owner (Terry) directly.
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      04-20-2013, 09:30 PM   #5
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Quote:
Originally Posted by infinitigor View Post
but the jb4 isn't available for the f30 yet, correct? so the CEL will most likely be on with these, but the mod is def worth it!

Will sound louder, and be faster. Although i wonder what happens if the CEL is on with catless, will the car run more rich / lean? or just the light is on
As the above poster noted, stage 2 jb4 is available, just have to request it specifically for the f30. I think it's only available as an upgrade so you need to get stage 1 for the wires also. It's technically in beta testing but people have been using it for months.

I think the CEL for the down pipe is merely about emissions and wouldn't hurt the car. The jb4 or anything else you may use just deletes the code and the light that pops up from that.
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      04-20-2013, 11:34 PM   #6
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I just did this mod.. worth every penny. No cell light or code with the JB stage 2 don't hesitate do it. car sounds crazy
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      04-24-2013, 06:17 PM   #7
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Quote:
Originally Posted by DanielChangg View Post
Will Catless down pipes make the stock 335 exhaust sound better/deeper?

Also can you do this to a leased car?
Customers with our Challenge HFC Dowpipe said it added a decent amount of rumble to the the OEM exhaust. Most still want a full added in the end though.
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      04-25-2013, 09:55 PM   #8
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Quote:
Originally Posted by DanielChangg View Post
Will Catless down pipes make the stock 335 exhaust sound better/deeper?

Also can you do this to a leased car?
The ER 4" Catless downpipe has been very popular and we have gotten alot of positive feedback on it.

The exhaust sound will be deeper and more aggressive. A great sound

The pipe is actually on sale now so you can PM me for more info.

Mike
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