To Down Pipe or not to Down Pipe - BMW 3-Series (E90 E92) Forum

GOTMH8N · 11-28-2012, 11:41 AM

Ok, I'm in bit of a predicament. I want more sound out of my car badly and to cut the secondary cats out will cost around $200-250 at a reputable shop. Here in lays the problem lol Raceland DPs are only $199 and I work at a dealership with free lift access and master mechanics to help when needed. However, once those DPs are on I would have to take them off if I was to ever go to the dealer for anything including the wastegate warranty which I am still eligible for( I'm at 74,845 miles). If I was to just cut the cats out I wouldn't have to worry about anything. I know, I know DPs give MASS HORSEPOWER!!! But I'm sitting conservatively around 320whp which is plenty at the moment so the horsepower gain is not something I really care about. I just would hate to buy DPs, install them, them develop a wastegate rattle and have to take them back off.

I'm stuckkkkkkkk haha

JStang · 11-28-2012, 11:47 AM

Quote:

Originally Posted by GOTMH8N

Ok, I'm in bit of a predicament. I want more sound out of my car badly and to cut the secondary cats out will cost around $200-250 at a reputable shop. Here in lays the problem lol Raceland DPs are only $199 and I work at a dealership with free lift access and master mechanics to help when needed. However, once those DPs are on I would have to take them off if I was to ever go to the dealer for anything including the wastegate warranty which I am still eligible for( I'm at 74,845 miles). If I was to just cut the cats out I wouldn't have to worry about anything. I know, I know DPs give MASS HORSEPOWER!!! But I'm sitting conservatively around 320whp which is plenty at the moment so the horsepower gain is not something I really care about. I just would hate to buy DPs, install them, them develop a wastegate rattle and have to take them back off.

I'm stuckkkkkkkk haha

From what I've heard, raceland downpipes fit like $hit. If you have access to a lift and can DIY, you should do definitely get DP's. It's a 2 hour job MAX if you know what you are doing.

Jeff@TopGearSolutions · 11-28-2012, 11:48 AM

Wastegate rattle is inevitable on this car, keeping that in mind, don't get downpipes if you dont want to hear it. Dp's give some decent power, but if you have a tune already you can actually gain more power with a good intercooler.

GOTMH8N · 11-28-2012, 12:07 PM

Quote:

Originally Posted by JStang

From what I've heard, raceland downpipes fit like $hit. If you have access to a lift and can DIY, you should do definitely get DP's. It's a 2 hour job MAX if you know what you are doing.

My friend has them and said they weren't bad.

Quote:

Originally Posted by Jeff@topgearsolutions

Wastegate rattle is inevitable on this car, keeping that in mind, don't get downpipes if you dont want to hear it. Dp's give some decent power, but if you have a tune already you can actually gain more power with a good intercooler.

I know heat soak is a serious issue with these cars so I have been thinking about an intercooler. I may just invest in that then. I know the turbo rattle is normal and I hear it but if I ever ran into the issue of no boost bc the wastegates failed I would rather be able to swing up to the dealer than have to take the DPs off first.

Gugs · 11-28-2012, 12:28 PM

Had my turbos replaced while FBO. So ur dp theory is bunked. Just get dp and move on

blackbeast06 · 11-28-2012, 12:48 PM

Get the dp's and put them on. It will be easier because you have a lift and mechanics to aide you. I was in your same position about putting them on and i went for it and glad i did. you definitely can hear the waste gates more pronounced but it is worth the power. And if you need new turbos you onky have tontake them off and on one more time, not mutiple times.

bigdaddycane · 11-28-2012, 12:51 PM

C@tless DP's with stock exhaust (back) sounds great. Perfect combo IMO.

As stated above go with a good fitting DP.....spend the extra money, it's worth it.

Laid Black 335i · 11-28-2012, 01:26 PM

Quote:

Originally Posted by bigdaddycane

C@tless DP's with stock exhaust (back) sounds great. Perfect combo IMO.

As stated above go with a good fitting DP.....spend the extra money, it's worth it.

+1 Not sure why you would buy eBay Dp's for a BMW when legit Dp's from vendors here are not much more $$

bigdaddycane · 11-28-2012, 03:00 PM

Quote:

Originally Posted by Laid Black 335i

+1 Not sure why you would buy eBay Dp's for a BMW when legit Dp's from vendors here are not much more $$

oh sh*t, now you did it....all the cheapos will come out of the wood work defending their chinese sh*t DPs.

GOTMH8N · 11-28-2012, 03:02 PM

Hmm I can get VRSF 3" catless for $320 shipped

E90Company · 11-28-2012, 03:06 PM

Quote:

Originally Posted by GOTMH8N

Hmm I can get VRSF 3" catless for $320 shipped

If you are going with China DP's, BMS's N54 downpipes are also a great option, and have Terry's support/quality behind them. Just a thought.

bigdaddycane · 11-28-2012, 04:24 PM

VSRF and BMS DPs should not be lumped in with the run of the mill Chinese DPs.

BMS DPs look very good and are said to fit perfectly.

E3r2E9r · 11-28-2012, 04:32 PM

Quote:

Originally Posted by bigdaddycane

VSRF and BMS DPs should not be lumped in with the run of the mill Chinese DPs.

BMS DPs look very good and are said to fit perfectly.

My vrsf fit and look great too. I would recommend them over raceland or plm.

GOTMH8N · 11-28-2012, 04:57 PM

It's a tough choice between DPs or FMIC now lol damn

zeenon53 · 11-28-2012, 05:05 PM

If you are going to get a set of DP's you might as well get 3" ones, that leaves out racelands. I personally have the vrsf dp's and fmic. I got the fmic first but a week later added the dp's. This was one of the easier sets of dp's to install.

dlbrooks18 · 11-28-2012, 05:10 PM

Go with the dp's..

CUTigers · 11-28-2012, 05:59 PM

That's a lot of money to get secondary cars cut out and replaced with some straight pipe.

AK 335i · 11-28-2012, 06:39 PM

i saw the same gain at the track under the same DA. with second cat delete as I did with catless dps.

CUTigers · 11-28-2012, 08:32 PM

Quote:

Originally Posted by smi1gj

i saw the same gain at the track under the same DA. with second cat delete as I did with catless dps.

How much louder did the car get? Thinking about cutting mine out.

AK 335i · 11-28-2012, 10:29 PM

Quote:

Originally Posted by CUTigers

How much louder did the car get? Thinking about cutting mine out.

if you keep the stock mufflers it won't be much louder.

brusk · 11-28-2012, 10:43 PM

It should be very inexpensive to have the cats replaced with a straight pipe. You can get the pipe for 30 bucks or less. I can't imagine you guys don't have a welder in the shop and somebody that can weld decent. Should only take them 30-45 minutes to cut the cats out and weld in the new piping.

CUTigers · 11-28-2012, 10:55 PM

Quote:

Originally Posted by brusk

It should be very inexpensive to have the cats replaced with a straight pipe. You can get the pipe for 30 bucks or less. I can't imagine you guys don't have a welder in the shop and somebody that can weld decent. Should only take them 30-45 minutes to cut the cats out and weld in the new piping.

+1, I was quoted $60 total for both cats cut and straight piped.

11-28-2012, 11:41 AM	#1
GOTMH8N 40 Roll? Drives: 335i Sport Join Date: May 2012 Location: Cincinnati Posts: 954 iTrader: (2)	To Down Pipe or not to Down Pipe Ok, I'm in bit of a predicament. I want more sound out of my car badly and to cut the secondary cats out will cost around $200-250 at a reputable shop. Here in lays the problem lol Raceland DPs are only $199 and I work at a dealership with free lift access and master mechanics to help when needed. However, once those DPs are on I would have to take them off if I was to ever go to the dealer for anything including the wastegate warranty which I am still eligible for( I'm at 74,845 miles). If I was to just cut the cats out I wouldn't have to worry about anything. I know, I know DPs give MASS HORSEPOWER!!! But I'm sitting conservatively around 320whp which is plenty at the moment so the horsepower gain is not something I really care about. I just would hate to buy DPs, install them, them develop a wastegate rattle and have to take them back off. I'm stuckkkkkkkk haha __________________ DCI // DPs // JB4
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11-28-2012, 11:48 AM	#3
Jeff@TopGearSolutions BimmerPost Supporting Vendor Drives: C6 Z06, GSXR-750, 09 335i Join Date: Dec 2008 Location: TopGearSolutions.com Posts: 12,449 iTrader: (25)	Wastegate rattle is inevitable on this car, keeping that in mind, don't get downpipes if you dont want to hear it. Dp's give some decent power, but if you have a tune already you can actually gain more power with a good intercooler. __________________ Latest Specials!! Email Me! Jeff@TopGearSolutions.Com Evolution Racewerks Charge Pipes and FMIC Sale ETS FMIC INTERCOOLER SALE! Cobb AP for BMW N54 & N55, Lowest Price! Like Us On Facebook For Discounts!

11-28-2012, 12:48 PM	#6
blackbeast06 adrenergic stimulation Drives: 2007 E92 335i Join Date: Dec 2009 Location: Akron Posts: 226 iTrader: (4) Garage List 2006 325i [0.00]	Get the dp's and put them on. It will be easier because you have a lift and mechanics to aide you. I was in your same position about putting them on and i went for it and glad i did. you definitely can hear the waste gates more pronounced but it is worth the power. And if you need new turbos you onky have tontake them off and on one more time, not mutiple times. __________________ 07 335i. Montego Blue/Saddle Brown. 6 MT.

11-28-2012, 12:51 PM	#7
bigdaddycane "waiting like a stalking butler..." Drives: 2007 335i Sedan Join Date: Aug 2009 Location: Northern Va Posts: 1,812 iTrader: (29) Garage List 2007 BMW 335 [0.00]	C@tless DP's with stock exhaust (back) sounds great. Perfect combo IMO. As stated above go with a good fitting DP.....spend the extra money, it's worth it. __________________ JB4\|CP-e\|ITG\|ER\|Forge DVs\|KW V1\|M3 Sways\|BBS CH\|BMS\|

11-28-2012, 03:02 PM	#10
GOTMH8N 40 Roll? Drives: 335i Sport Join Date: May 2012 Location: Cincinnati Posts: 954 iTrader: (2)	Hmm I can get VRSF 3" catless for $320 shipped __________________ DCI // DPs // JB4

11-28-2012, 12:28 PM	#5
Gugs Cynical Drives: E92 JetBlack Join Date: Jul 2012 Location: Long island Posts: 357 iTrader: (0)	Had my turbos replaced while FBO. So ur dp theory is bunked. Just get dp and move on

11-28-2012, 04:24 PM	#12
bigdaddycane "waiting like a stalking butler..." Drives: 2007 335i Sedan Join Date: Aug 2009 Location: Northern Va Posts: 1,812 iTrader: (29) Garage List 2007 BMW 335 [0.00]	VSRF and BMS DPs should not be lumped in with the run of the mill Chinese DPs. BMS DPs look very good and are said to fit perfectly. __________________ JB4\|CP-e\|ITG\|ER\|Forge DVs\|KW V1\|M3 Sways\|BBS CH\|BMS\|

11-28-2012, 04:57 PM	#14
GOTMH8N 40 Roll? Drives: 335i Sport Join Date: May 2012 Location: Cincinnati Posts: 954 iTrader: (2)	It's a tough choice between DPs or FMIC now lol damn __________________ DCI // DPs // JB4

11-28-2012, 05:05 PM	#15
zeenon53 Major Drives: BMW Join Date: Apr 2010 Location: obx Posts: 1,006 iTrader: (3)	If you are going to get a set of DP's you might as well get 3" ones, that leaves out racelands. I personally have the vrsf dp's and fmic. I got the fmic first but a week later added the dp's. This was one of the easier sets of dp's to install. __________________

11-28-2012, 05:10 PM	#16
dlbrooks18 Brigadier General Drives: e90 335i Join Date: Nov 2008 Location: Los Angeles Posts: 3,186 iTrader: (2)	Go with the dp's.. __________________ 2008 E90 335

11-28-2012, 05:59 PM	#17
CUTigers Captain Drives: 2008 Montego Blue 335i Join Date: Mar 2012 Location: Atlanta/Lawrenceville Posts: 842 iTrader: (0) Garage List 2008 Lexus IS F [5.00] 2008 e90 335i [4.50]	That's a lot of money to get secondary cars cut out and replaced with some straight pipe.

11-28-2012, 06:39 PM	#18
AK 335i Captain Drives: black 335i E90 Join Date: Sep 2012 Location: boynton beach Posts: 672 iTrader: (0)	i saw the same gain at the track under the same DA. with second cat delete as I did with catless dps. __________________ - Proven Power Tampa Built 6466 ST - Vargas Head Flanges - Vargas HPFP Upgrade -6466 Build:http://www.e90post.com/forums/showth...ight=6466+335i

11-28-2012, 10:43 PM	#21
brusk First Lieutenant Drives: 2008 135i Coupe Join Date: Jan 2012 Location: Dallas, TX Posts: 362 iTrader: (1)	It should be very inexpensive to have the cats replaced with a straight pipe. You can get the pipe for 30 bucks or less. I can't imagine you guys don't have a welder in the shop and somebody that can weld decent. Should only take them 30-45 minutes to cut the cats out and weld in the new piping. __________________ 2008 135i - Cobb AP, MS DP's, Berk street exhaust, AMS IC, BMS DCI, CDV delete, Quaife LSD, M3 control arms, M3 rear SF bushings, SS brake lines.

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