Can you guys help me to decide...DP's or Exhaust first???

Ville · 02-13-2009, 12:55 PM

Hi guys,

I have currently Procede RevII + DCI and I'm wondering what would be the next best move. IC I'm having for sure but debatting between DP's and an exhaust! I can't have both at the same time now cause of a limited budget...
( need so much other nice stuff too

)

I can't go totally catless, so I guess alternatives are:

Stock DP's + 2nd cat delete
Catless DP's + stock exhaust
Catless DP's + aftermarket Exhaus with HF cat's
DP's with HF cats + 2nd cat delete

Thanks guys

-Ville-

Qmax03 · 02-13-2009, 01:01 PM

Get the Exhaust 1st.. Soem nice exhasut tips would look pretty

PaulBailey@ltbmw · 02-13-2009, 01:03 PM

definitely downpipes first.
Nice sound plus higher gains.
You might like the sound enough to just put some nice tips on your stock exhaust

veightkiller · 02-13-2009, 01:04 PM

i'd go with a catless downpipe first. imo

PaulBailey@ltbmw · 02-13-2009, 01:08 PM

Quote:

Originally Posted by veightkiller

i'd go with a catless downpipe first. imo

Ville · 02-13-2009, 01:08 PM

Which way you guys think is better??

Catted DP's + 2nd cat delete or
Catless DP's + 2nd cat's HF ( thoug it would be stock first )

Edit: you are quick to reply

makes this one seem like I wasn't reading all the posts

ar design · 02-13-2009, 01:39 PM

Catless downpipes + hi-flow secondaries.

enrita · 02-13-2009, 02:01 PM

or just Catless Dps , std. exhaust middle and axle back for the looks and sound.

Ville · 02-13-2009, 02:04 PM

That actually sounds like a nice setup

AV9 · 02-13-2009, 02:25 PM

Quote:

Originally Posted by ar design

Catless downpipes + hi-flow secondaries.

+1

dlbrooks18 · 02-13-2009, 02:32 PM

for best performance gains w/ your current tune definetely do catless dp's next.. and leave everything else stock for now, I think you'll be very happy.. then if your budget permits get midpipes after that. I don't even think you'll want to change your stock exhaust with that setup. Keep us posted on what you decide..

gt3fever · 02-13-2009, 02:35 PM

go complete catless

ZJP · 02-13-2009, 02:46 PM

I have catless downpipes + stock exhaust on my car and it definitely made a huge difference.

The sound is nice and mild when cruising, but once you get into the higher rpm's the car just screams.

uuni · 02-13-2009, 03:25 PM

Will car with catless downpipes still clear emissions in inspection?

driving335i · 02-13-2009, 03:30 PM

its kinda pointless to get DP"S first cause ur stock exhaust is just gunna defeat the purpose of the airflow of the DP"S cause of the cats. exhaust then DP"S

enrita · 02-13-2009, 03:45 PM

Quote:

Originally Posted by driving335i

its kinda pointless to get DP"S first cause ur stock exhaust is just gunna defeat the purpose of the airflow of the DP"S cause of the cats. exhaust then DP"S

I dont agree on this. The point of the Catlees dps is to offer no restriction at first , right after the turbos in order to make the spool faster and evacuate gasses. For a turbo car thats the most crucial part of the exhaust.

dlbrooks18 · 02-13-2009, 03:51 PM

^+1

flem · 02-13-2009, 03:51 PM

Quote:

Originally Posted by enrita

I dont agree on this. The point of the Catlees dps is to offer no restriction at first , right after the turbos in order to make the spool faster and evacuate gasses. For a turbo car thats the most crucial part of the exhaust.

I agree... the stock exhaust is not terribly restrictive IMO

asdflkijd · 02-13-2009, 05:30 PM

downpipes first, your turbos will spool faster and you will get more throttle response. exhaust will mainly serve as a weight reducer/ looks and slight power gains, unless you go with a full catless exhuast..

but I say DP's first.. the secondary cats (the ones on the exhaust) are useless so you won't get much restriction if you get catless dp's which would replace the primary cats, they will also reduce the weight.. the stock catted dp's are heavyy

Ville · 02-13-2009, 06:07 PM

Thanks guys

99% sure that I'm gonna go with the AR catless DP's next!!

the 1% is me worried about smog/emission tests...Any thoughts???

I really woudn't want take them off and on again!!

dmurray14 · 02-13-2009, 06:11 PM

Quote:

Originally Posted by Ville

Thanks guys

99% sure that I'm gonna go with the AR catless DP's next!!

the 1% is me worried about smog/emission tests...Any thoughts???

I really woudn't want take them off and on again!!

I'm interested in this too....can you still pass inspection with catless dps?

Edit: I guess as long as they don't throw a code they'd be fine...they don't sniff anymore, right?

XPO186 · 02-13-2009, 06:19 PM

Quote:

Originally Posted by Ville

Hi guys,

I have currently Procede RevII + DCI and I'm wondering what would be the next best move. IC I'm having for sure but debatting between DP's and an exhaust! I can't have both at the same time now cause of a limited budget...
( need so much other nice stuff too

)

I can't go totally catless, so I guess alternatives are:

Stock DP's + 2nd cat delete
Catless DP's + stock exhaust
Catless DP's + aftermarket Exhaus with HF cat's
DP's with HF cats + 2nd cat delete

Thanks guys

-Ville-

Go this route but start with catless DPs first

02-13-2009, 12:55 PM	#1
Ville Private 1 Rep 59 Posts Drives: 335iA -07 Join Date: Dec 2008 Location: Aberdeen / Turku iTrader: (0)	Can you guys help me to decide...DP's or Exhaust first??? Hi guys, I have currently Procede RevII + DCI and I'm wondering what would be the next best move. IC I'm having for sure but debatting between DP's and an exhaust! I can't have both at the same time now cause of a limited budget... ( need so much other nice stuff too ) I can't go totally catless, so I guess alternatives are: Stock DP's + 2nd cat delete Catless DP's + stock exhaust Catless DP's + aftermarket Exhaus with HF cat's DP's with HF cats + 2nd cat delete Thanks guys -Ville-
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02-13-2009, 01:01 PM	#2
Qmax03 LINEITUP 61 Rep 725 Posts Drives: 2010 335i MT AW Join Date: Jan 2009 Location: New York City iTrader: (2)	Get the Exhaust 1st.. Soem nice exhasut tips would look pretty
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02-13-2009, 01:03 PM	#3
PaulBailey@ltbmw General 688 Rep 26,876 Posts Drives: 2-325 330 2-335 2-Z4 2-135 X5d Join Date: Mar 2007 Location: Huntington Beach, CA iTrader: (34) Garage List 2008 BMW 335i E90 [7.00] 2011 BMW 335i E92 [7.96]	definitely downpipes first. Nice sound plus higher gains. You might like the sound enough to just put some nice tips on your stock exhaust
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02-13-2009, 01:04 PM	#4
veightkiller Brigadier General 66 Rep 4,149 Posts Drives: e90 335i Join Date: Dec 2007 Location: Vancouver,B.C iTrader: (3)	i'd go with a catless downpipe first. imo
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02-13-2009, 01:08 PM	#6
Ville Private 1 Rep 59 Posts Drives: 335iA -07 Join Date: Dec 2008 Location: Aberdeen / Turku iTrader: (0)	Which way you guys think is better?? Catted DP's + 2nd cat delete or Catless DP's + 2nd cat's HF ( thoug it would be stock first ) Edit: you are quick to reply makes this one seem like I wasn't reading all the posts
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02-13-2009, 01:39 PM	#7
ar design 304 Rep 4,408 Posts Drives: 04 M3 Join Date: Jan 2008 Location: Denver, CO iTrader: (9)	Catless downpipes + hi-flow secondaries. __________________ -Critter
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02-13-2009, 02:01 PM	#8
enrita Major General 163 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	or just Catless Dps , std. exhaust middle and axle back for the looks and sound. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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02-13-2009, 02:04 PM	#9
Ville Private 1 Rep 59 Posts Drives: 335iA -07 Join Date: Dec 2008 Location: Aberdeen / Turku iTrader: (0)	That actually sounds like a nice setup
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02-13-2009, 02:32 PM	#11
dlbrooks18 Brigadier General 164 Rep 3,735 Posts Drives: e90 335i Join Date: Nov 2008 Location: Los Angeles iTrader: (2)	for best performance gains w/ your current tune definetely do catless dp's next.. and leave everything else stock for now, I think you'll be very happy.. then if your budget permits get midpipes after that. I don't even think you'll want to change your stock exhaust with that setup. Keep us posted on what you decide..
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02-13-2009, 02:35 PM	#12
gt3fever Major 79 Rep 1,232 Posts Drives: 992 GT3, G87 Join Date: Oct 2008 Location: Socal, Taiwan iTrader: (15)	go complete catless
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02-13-2009, 02:46 PM	#13
ZJP Lieutenant Colonel 136 Rep 1,759 Posts Drives: F10 535xi / B6 S4 Join Date: Jan 2008 Location: LI, NY iTrader: (7)	I have catless downpipes + stock exhaust on my car and it definitely made a huge difference. The sound is nice and mild when cruising, but once you get into the higher rpm's the car just screams.
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02-13-2009, 03:25 PM	#14
uuni First Lieutenant 72 Rep 337 Posts Drives: BMW Join Date: Apr 2007 Location: Space iTrader: (0)	Will car with catless downpipes still clear emissions in inspection?
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02-13-2009, 03:30 PM	#15
driving335i Banned 6 Rep 50 Posts Drives: downpipes, scoops, JB3 1.22,ex Join Date: Feb 2009 Location: orange county iTrader: (0)	its kinda pointless to get DP"S first cause ur stock exhaust is just gunna defeat the purpose of the airflow of the DP"S cause of the cats. exhaust then DP"S
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02-13-2009, 03:51 PM	#17
dlbrooks18 Brigadier General 164 Rep 3,735 Posts Drives: e90 335i Join Date: Nov 2008 Location: Los Angeles iTrader: (2)	^+1
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02-13-2009, 05:30 PM	#19
asdflkijd Aberry is a scammer 599 Rep 5,507 Posts Drives: SGM E92 335i, AM E90 335i Join Date: Jun 2007 Location: Seattle, WA iTrader: (14) Garage List 2008 E92 335i [10.00] 2007 E90 335i (Reti ... [9.00]	downpipes first, your turbos will spool faster and you will get more throttle response. exhaust will mainly serve as a weight reducer/ looks and slight power gains, unless you go with a full catless exhuast.. but I say DP's first.. the secondary cats (the ones on the exhaust) are useless so you won't get much restriction if you get catless dp's which would replace the primary cats, they will also reduce the weight.. the stock catted dp's are heavyy
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02-13-2009, 06:07 PM	#20
Ville Private 1 Rep 59 Posts Drives: 335iA -07 Join Date: Dec 2008 Location: Aberdeen / Turku iTrader: (0)	Thanks guys 99% sure that I'm gonna go with the AR catless DP's next!! the 1% is me worried about smog/emission tests...Any thoughts??? I really woudn't want take them off and on again!!
	Appreciate 0 Quote