[Orion4]

Originally Posted by Seba77W

I have a 2014 435i xDrive and my wife only knows about my CTS Turbo air intake. I have a Fabspeed High flow cat 21hp and 36tq alone and barley any louder than stock. Other mods include
ER charge pipe
ER comp. intercooler

She "knows" now!!!

[Seba77W]

Originally Posted by Orion4

She "knows" now!!!

OMG!!! why did you tell her!!!!

[Mike@N54Tuning.com]

Originally Posted by SecretAsianMan

My wife is having a "baby" and apparently I couldn't fit a rear facing child seat in my 911 so I sold it.

So now we have a practical car ('14 335i xDrive), complete with four doors, an automatic transmission, and the thing even has all-season tires. I'd like to make it a little more fun to drive, but I want to keep it super stealth - it must be easy to drive, it must be quiet, and most importantly I must have some plausible deniability if my wife asks me if I modified it.

Seems like a chip of some sort is a no-brainer. But are there any other power-makers that won't be an obvious tipoff? It sounds like even a catted downpipe will make the car substantially louder.

For stealth something like JB4 is a good starting point.. Any other bolt ons are pretty obvious. Maybe an anodized black Evolution Racewerks Charge Pipe. Looks pretty OEM.

Drop in filter as well maybe..

Mike

[JaredG_F30]

I doubt your wife would notice any of the following...

Upgraded FMIC
Drop in air filter
High Flow Catted DP
BootMod3 + tune

With a custom tune, you could add +60hp/+80trq

[Mike@N54Tuning.com]

Originally Posted by JaredG_F30

I doubt your wife would notice any of the following...

Upgraded FMIC
Drop in air filter
High Flow Catted DP
BootMod3 + tune

With a custom tune, you could add +60hp/+80trq

High Flow Catted downpipes will changed the exhaust tone.. Whether she notices or not we have no idea

Mike

[HKD126]

My lady didn’t notice my new $4500 Wheels.... Ha!

[SecretAsianMan]

Originally Posted by HKD126

My lady didn’t notice my new $4500 Wheels.... Ha!

not even from the bank account??

The DP + tune suggestion is sounding pretty good. Exhaust tone change is just fine so long as it doesn't get massively louder. Anyone in Seattle area with catted downpipe willing to let me have a listen?

Awesome thread, thank you everyone for your posts. Really appreciate it.

Looks like there are no bootmod3 dealers near me, and I don't really want to get into a whole science experiment of futzing with it. Might go JB4.

Long term reliability: Any high mileage N55+JB4 owners? How durable is the AT + xDrive?

[viperguy212]

Originally Posted by Sheharyar_rr

Bootmod3 > jb4

I know this typically tends to be the common opinion around these parts but as someone with only 30k miles the DME unlock makes me a bit uneasy should the dealer go poking around for some reason.

JB4 I can in theory pop on and off anytime I ever need to bring it in.

OP - I'd take that into consideration if concerned about the wifey's reaction.

[F30NFifty5]

Originally Posted by Stlthnmrdrd

Straight pipe

lol

[FastF30]

Originally Posted by HKD126

My lady didn’t notice my new $4500 Wheels.... Ha!

I would of used that money for a PS2... it's stealthy enough...

[sbinshihon]

Originally Posted by SecretAsianMan

My wife is having a "baby" and apparently I couldn't fit a rear facing child seat in my 911 so I sold it.

So now we have a practical car ('14 335i xDrive), complete with four doors, an automatic transmission, and the thing even has all-season tires. I'd like to make it a little more fun to drive, but I want to keep it super stealth - it must be easy to drive, it must be quiet, and most importantly I must have some plausible deniability if my wife asks me if I modified it.

Seems like a chip of some sort is a no-brainer. But are there any other power-makers that won't be an obvious tipoff? It sounds like even a catted downpipe will make the car substantially louder.

Look up Racechip XLR with Blutooth.

[Bear3525]

Originally Posted by scostu

BMW MPE ....and...down pipe will make it louder....but since you had to make a HUGE sacrifice ....you deserve it

Look into the MPPK or MPPSK or DINAN.

Look into the sponsers (http://f30.bimmerpost.com/forums/for...ay.php?f=398)p
page on this forum.....lots of aftermarket bolt-ons that are effective and cheaper than BMW.

I have a Dinan stage 2 for sale that I’m not using anymore. Make me an offer

[Bear3525]

Originally Posted by SecretAsianMan

My wife is having a "baby" and apparently I couldn't fit a rear facing child seat in my 911 so I sold it.

So now we have a practical car ('14 335i xDrive), complete with four doors, an automatic transmission, and the thing even has all-season tires. I'd like to make it a little more fun to drive, but I want to keep it super stealth - it must be easy to drive, it must be quiet, and most importantly I must have some plausible deniability if my wife asks me if I modified it.

Seems like a chip of some sort is a no-brainer. But are there any other power-makers that won't be an obvious tipoff? It sounds like even a catted downpipe will make the car substantially louder.

I have a Dinan stage 2 for sale that I’m not using anymore. Very low miles. Make me and offer

[bradsm87]

If it's EWG, put MHD Stage 1 on it and you'll have great gains. If it's PWG, put a Stage 1 turbo on with everything else stock and a custom tune.