[ar design]

I am a big fan of downpipes Very nice power and spool gains with the V3

[gt3fever]

get the catless dp. it gives you huge power gain and sounds so mean.
if your worry about ur warranty, then you should've keep it stock at first not to mod her lol.

[Sniz]

the order I went was

-Helix intercooler (I bought their test mule intercooler back in 2007 sometime
-Ulitmate RAcing CAI
-UR catless downpipes
-Britalman catless exhaust

the sum of all those was awesome.....just awesome.

if I were you i'd go first w/ the catless downpipes but keep your stockers around in case you need to swap them back in for serious warranty work. It will give you faster spool, more hp/tq, less wear on your DP's (i think), and a meaner sound.

[FotiosF90M5]

Originally Posted by hipertech

get the catless dp. it gives you huge power gain and sounds so mean.
if your worry about ur warranty, then you should've keep it stock at first not to mod her lol.

I can take the procede out in 15 mins. cant say that with DP's. How many people are on here with tunes that arent worried about their warranty? ..lol

[NM_BMW]

I'd do intake then flip a coin for dp's or fmic.

[FotiosF90M5]

Originally Posted by hipertech

get the catless dp. it gives you huge power gain and sounds so mean.
if your worry about ur warranty, then you should've keep it stock at first not to mod her lol.

how much does the sound change? Id love it to sound meaner.

[SLCGoonski]

For cheap...let her breathe with an intake. DIY install, minimal investment. Sounds a little better too.

Next go DP (haven't made that step but friends have). More money, pro install (and removal for dealer) adds up. Sounds really cool.

[ar design]

Originally Posted by SLCGoonski

For cheap...let her breathe with an intake. DIY install, minimal investment. Sounds a little better too.

Next go DP (haven't made that step but friends have). More money, pro install (and removal for dealer) adds up. Sounds really cool.

DP install is definitively a DIY.

[lavetaaxon]

throw in a dci and you will see an increase of about 10-15 whp...the new injen one has shown 10 whp gains in a stock 335i

[OpenFlash]

I don't believe that an intake upgrade with be worth ANY amount of power in a stock car.

[gt3fever]

Originally Posted by fotios335i

how much does the sound change? Id love it to sound meaner.

much louder turbo spools if you go with catless dp. even better with dp back exhaust.
you'll defi love how it screams

[creaminz]

I'm on the same boat...craving for more power...catless dp isn't something I can swap out easily...espcially without the lift.
I'm thinking about getting AE exhaust for better breathing and add few more ponies. Try not to void warranty if I can.
so with Rev.II with Vishnu DCI and dp back exhaust such as Autobahn Exotics, approximately how much power am I putting down? Is that considered Stage I or Stage II? What gives more power adding an Helix Intercooler or AE Exhaust?

[335ievo]

add 100 octane fuel & a e90post sticker
I wouldn't get catback exhausts, waste of money with most of the systems out there.

[uuni]

Originally Posted by ar design

DP install is definitively a DIY.

Is it? How long about it takes?

[cn555ic]

Originally Posted by uuni

Is it? How long about it takes?

DPs takes an average person about 5 to 6 hours i would say...Yes it can be a DIY but you need to be really knowledgeable and have the correct tools, and even then its not easy and takes a well experienced person 3-4 hours still....When I get mine I will not be doing it myself thats for sure, and up until now all my mods which is quite extensive I have done myself....I am in process of installing a RR Catch can!

[uuni]

Originally Posted by cn555ic

DPs takes an average person about 5 to 6 hours i would say...Yes it can be a DIY but you need to be really knowledgeable and have the correct tools, and even then its not easy and takes a well experienced person 3-4 hours still....When I get mine I will not be doing it myself thats for sure, and up until now all my mods which is quite extensive I have done myself....I am in process of installing a RR Catch can!

That is what I tought also.

[lamia2super]

dps is my vote, u get more power and the turbo spool sounds sexy lol and an intake is a must have

[gtrokin330]

Originally Posted by BALLAJL15

I have the Active Autowerks intercooler... Why doenst any one ever suggest that one. Works wonders for me

arent those things over expensive?

[Driver72]

I guess people haven't read the part where it states you are on a tight budget. recommending catless DP's and FMIC are not small coin.
They are $700-800 for the DP's plus a couple benji's for install.
The FMIC is $1000-1200 plus install too.

Since you are apparently on a tight budget if I were you I'd get a DCI.

Seems many thought the stock exhaust was the restriction initially but seems more and more tests show that they don't restrict too much in the way of power until you get to 380+ rwhp.

You live in Mass. for God's sake, I don't think a FMIC is needed to much when temps there are pretty darn cool most of the year.
FMIC would only be needed there if you plan to track a lot. But on a limited budget, doubt you'll be tracking your car a lot.
So forget the need for the FMIC.

As you stated Mass. is a 93 Octane state too.

I don't know, you can ask Shiv for sure, but I'd think with 93 Octane and a DCI you could get away with running Stage 2 map 90% of the time (may be an issue in summer temps that get above 85-90 degrees)

I know a catless exhaust is "recommended" for stage 2 but Shiv has always been conservative with that.

If anything, maybe just remove the 2nd cat in the mid section of the exhaust. A few dyno tests have shown that to do very little (maybe 3-4 rwhp gain when removed) but it will free up a BIT more airflow too and wouldn't be so much of a warranty issue as the catless DP's.
But it might still be a problem as once they are cut out, they can't be put back in without people knowing.

But personally again, add the $100-200 DCI and switch to Stage 2.
That should be good for 15-20 rwhp gain overall.

After that, you need to spend some coin (and blow off your warranty and the environment) to get more power from the N54 engine.

[cn555ic]

Yes the new maps are conservative...thats why I have stage 1 non-doomsday set to 94% and only seeing 14psi!!! I know i can get away with stage 2 and leave the UT, but I chose stage 1.