F30POST
F30POST
2012-2015 BMW 3-Series and 4-Series Forum
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > CHALLENGE - F30 335 - HFC and Catless Downpipes - Now Released! - Pics inside -
GetBMWParts
Closed Thread
 
Thread Tools Search this Thread
      12-05-2012, 06:49 PM   #1
GTM_Challenge
GTM_Challenge's Avatar
United_States
269
Rep
2,946
Posts

Drives: E46 M3, E90 M3
Join Date: Jan 2010
Location: Nashville

iTrader: (7)

CHALLENGE - F30 335 - HFC and Catless Downpipes - Now Released! - Pics inside -

CHALLENGE - F30 335 - HFC and Catless Downpipes - Now Released!


HFC Downpipe

New for 2012! Challenge has designed their new F30 335i stainless steel catless downpipe. Each downpipe is made from 3inch mandrel bent stainless steel tubing and 200 cell metallic core cat. Custom machined 304 stainless flanges and formed mount brackets ensure a factory fit and long lasting performance. Current ECU version on US models are able to use this downpipe with no ECU flash or check engine light. Some models may require an ECU tune or flash. Off road or racing use only. Challenge exhaust parts are deisgned, engineered and manufactured in the USA.









Dyno graph of stock 335 before and after Challenge HFC Downpipe and Sport Catback Exhaust:





Catless Downpipe

Challenge has designed their new F30 335i stainless steel catless downpipe. Each downpipe is made from 3 inch mandrel bent stainless steel tubing. Custom machined 304 stainless flanges and formed mount brackets ensure a factory fit and long lasting performance. ECU programing will be required to use this part as the primary cat is removed. Off road or racing use only. Challenge exhaust parts are deisgned, engineered and manufactured in the USA.









Dynos of catless downpipe to come soon.



PLEASE EMAIL OR PM US WITH ANY QUESTIONS OR PRICING DETAILS

Last edited by GTM_Challenge; 12-06-2012 at 03:18 PM..
Appreciate 0
      12-05-2012, 07:08 PM   #2
mikew2069
Lieutenant Colonel
mikew2069's Avatar
413
Rep
1,975
Posts

Drives: F30 335i MSport
Join Date: Oct 2012
Location: Houston

iTrader: (2)

Beautiful.... I don't know why I'm so excited to get mine since I don't have my car for another month!... When do they ship?
__________________
2013 F30 335i ///M-Sport
Forgestar/Challenge/BMS JB4
Wagner/Evo Race/M-Performance
2016 F15 50i ///M-Sport
BM3/H&R/Borla
Appreciate 0
      12-05-2012, 07:14 PM   #3
GTM_Challenge
GTM_Challenge's Avatar
United_States
269
Rep
2,946
Posts

Drives: E46 M3, E90 M3
Join Date: Jan 2010
Location: Nashville

iTrader: (7)

Quote:
Originally Posted by mikew2069 View Post
Beautiful.... I don't know why I'm so excited to get mine since I don't have my car for another month!... When do they ship?
Some have already shipped, and with others shipping Friday. Catless are on the shelf and HFC will have available units Friday also.
Appreciate 0
      12-05-2012, 07:38 PM   #4
NICKTENN
Second Lieutenant
NICKTENN's Avatar
United_States
55
Rep
265
Posts

Drives: 340i M Sport
Join Date: Mar 2012
Location: Suburb of Tampa FL

iTrader: (0)

Garage List
Pricing?
__________________
2016 340i M Sport Alpine White, BMS Intake, JB4 Beta

2012 335i Sport Line, RIP
Appreciate 0
      12-05-2012, 07:44 PM   #5
TreDirtyFive
Major
United_States
253
Rep
1,334
Posts

Drives: X3 M40i
Join Date: Jun 2008
Location: Los Angeles, CA

iTrader: (11)

no link or pricing??
__________________
X3 M40i G01, M235i F22, 335 F30 MSport, 135 DCT, 335 E92, Audi A3
Appreciate 0
      12-05-2012, 07:46 PM   #6
GTM_Challenge
GTM_Challenge's Avatar
United_States
269
Rep
2,946
Posts

Drives: E46 M3, E90 M3
Join Date: Jan 2010
Location: Nashville

iTrader: (7)

Quote:
Originally Posted by TreDirtyFive View Post
no link or pricing??
http://www.gtmotoring.com/index.php?...=&filter_id=22

Not sure if its allowed so may get removed. Please feel free to PM or email us with any questions.
Appreciate 0
      12-05-2012, 08:01 PM   #7
mikew2069
Lieutenant Colonel
mikew2069's Avatar
413
Rep
1,975
Posts

Drives: F30 335i MSport
Join Date: Oct 2012
Location: Houston

iTrader: (2)

Quote:
Originally Posted by GTM_Challenge View Post
Some have already shipped, and with others shipping Friday. Catless are on the shelf and HFC will have available units Friday also.
Cool, hopefully mine is one that's shipped. Can't wait to see the dyno of the catless dp vs the hfc dp! I hope I'm not losing too much powa with the hfc!
__________________
2013 F30 335i ///M-Sport
Forgestar/Challenge/BMS JB4
Wagner/Evo Race/M-Performance
2016 F15 50i ///M-Sport
BM3/H&R/Borla
Appreciate 0
      12-05-2012, 09:03 PM   #8
rallybull
Major
rallybull's Avatar
United_States
179
Rep
1,044
Posts

Drives: F30 335i w/PPK
Join Date: Jul 2012
Location: USA

iTrader: (0)

would like to go in for something like this to increase power but does it not bother people that the car does not remain street legal after these mods? Or is something like dark tints are also not street legal, but a lot of people do it anyway?
Appreciate 0
      12-05-2012, 09:16 PM   #9
J-boogey
Major
J-boogey's Avatar
United_States
70
Rep
1,339
Posts

Drives: F30 335xi Msport
Join Date: Sep 2009
Location: Oceanside, New York

iTrader: (3)

will this fit xdrive?
__________________
2013 F30 335i xdrive | Estoril Blue | Black Dakota Leather | Aluminum Hexagon trim | M-Sport | Cold weather | DHP | Premium package | Tech package | Harmon Kardon | PDC | Rearview Cam | IND Painted reflectors | BMW performance grills | JB4 stage 2 | ER downpipe | BMS Intake | H&R sport springs
Appreciate 0
      12-05-2012, 09:54 PM   #10
GTM_Challenge
GTM_Challenge's Avatar
United_States
269
Rep
2,946
Posts

Drives: E46 M3, E90 M3
Join Date: Jan 2010
Location: Nashville

iTrader: (7)

Quote:
Originally Posted by J-boogey View Post
will this fit xdrive?
I have to confirm with BMW , but should be ok as long as the downpipe is the same for the rwd as the xi. Both units are the same or smaller then the oem
Appreciate 0
      12-05-2012, 10:10 PM   #11
shivaswrath
Brigadier General
shivaswrath's Avatar
United_States
649
Rep
4,323
Posts

Drives: 2012 335i
Join Date: Apr 2008
Location: Lost in NJ

iTrader: (3)

Are you going to run a GB for the introduction? I'd be down for a catted version...NICELY crafted.
__________________
CURRENT: 2017 RS3 (miss you guys)
SOLD: 2012 335i Mineral Gray

M Performance Exhaust/Brakes/Suspension/LSD|Bav Stage 1/AMP||ER CP/IC/DP/OC | Dinan CAI/N55 PWG BIG TURBO|BMWF30.com
Appreciate 0
      12-05-2012, 10:11 PM   #12
shivaswrath
Brigadier General
shivaswrath's Avatar
United_States
649
Rep
4,323
Posts

Drives: 2012 335i
Join Date: Apr 2008
Location: Lost in NJ

iTrader: (3)

and those 30 whp gains are with a catted DP + cat back?
__________________
CURRENT: 2017 RS3 (miss you guys)
SOLD: 2012 335i Mineral Gray

M Performance Exhaust/Brakes/Suspension/LSD|Bav Stage 1/AMP||ER CP/IC/DP/OC | Dinan CAI/N55 PWG BIG TURBO|BMWF30.com
Appreciate 0
      12-06-2012, 12:26 AM   #13
RollingLower42
Lieutenant
RollingLower42's Avatar
71
Rep
556
Posts

Drives: 2012 BMW 335I
Join Date: May 2012
Location: Los Angeles

iTrader: (0)

Garage List
How much HP does each downpipe add? Also can you explain the difference between the two?

How much louder would this make your car once you add it? Is it going to be super noticeable to authorities, or would it still be low key?
Appreciate 0
      12-06-2012, 06:50 AM   #14
1clean335i
Perf BMW mag issue 147, 159
1clean335i's Avatar
Vietnam
413
Rep
6,803
Posts

Drives: Project Estoril
Join Date: Feb 2007
Location: Miami, FL

iTrader: (31)

Garage List
sweet!
__________________
'13 Estoril Blue 335i M-sport
*Don't PM me!* Message me here- http://www.facebook.com/ProjectEstoril
Appreciate 0
      12-06-2012, 08:55 AM   #15
jsedlak
Lieutenant
jsedlak's Avatar
13
Rep
411
Posts

Drives: F30 335i 6spd
Join Date: Sep 2012
Location: Morristown, NJ

iTrader: (0)

Quote:
Originally Posted by RollingHard28 View Post
How much HP does each downpipe add? Also can you explain the difference between the two?

How much louder would this make your car once you add it? Is it going to be super noticeable to authorities, or would it still be low key?
Dyno says a pretty consistent 12-20bhp.

AFAIK, because the cat's main purpose is to make the exhaust "cleaner," it doesn't affect the sound nearly as much as the muffler. From what I've seen on YouTube it seems to make the exhaust throatier more than anything else. The goal of removing the cat is to improve the flow of the exhaust. The catless pipe will be louder than the HFC.

Edit: This is from the stage1 thread:
Quote:
Originally Posted by brentmeister7592 View Post
Yes, it gives is a PERFECT not in my honest opinion. Just slightly louder and more aggressive, and since there is no more cat the turbo spool is very apparent
The main difference between Catless and HFC is that the HFC still tries to pass emissions standards. Therefore it sacrifices some performance gains to make it semi-streetable.

So long as the downpipe doesn't throw codes and your exhaust can pass emissions, you should be okay. IF you're caught though... well good luck.

Anyways, if you're going WOT past a cop in an exhaust modified (even the M-Perf exhaust) 335i then you're probably going to get pulled over with or without the modified downpipe.


As always - correct me if I'm wrong. I'm still a novice in this arena.
__________________
johnsedlak.com - web developer, designer

Last edited by jsedlak; 12-06-2012 at 09:17 AM..
Appreciate 0
      12-06-2012, 09:29 AM   #16
tdizzle
Colonel
United_States
107
Rep
1,997
Posts

Drives: 2017 F80 ZCP
Join Date: Aug 2012
Location: Memphis

iTrader: (0)

Tune required?

I'm wondering how this would affect the PPK (assuming we can ever get it)
Appreciate 0
      12-06-2012, 10:04 AM   #17
GTM_Challenge
GTM_Challenge's Avatar
United_States
269
Rep
2,946
Posts

Drives: E46 M3, E90 M3
Join Date: Jan 2010
Location: Nashville

iTrader: (7)

Quote:
Originally Posted by shivaswrath View Post
and those 30 whp gains are with a catted DP + cat back?
Catted DP with our Sport exhaust. No ecu Tuning. Peak WTQ gains were 30 ft lbs, and peak WHP gains were 20 hp. The best part is there are gains across the entire powerband.
Appreciate 0
      12-06-2012, 10:08 AM   #18
GTM_Challenge
GTM_Challenge's Avatar
United_States
269
Rep
2,946
Posts

Drives: E46 M3, E90 M3
Join Date: Jan 2010
Location: Nashville

iTrader: (7)

Quote:
Originally Posted by RollingHard28 View Post
How much HP does each downpipe add? Also can you explain the difference between the two?

How much louder would this make your car once you add it? Is it going to be super noticeable to authorities, or would it still be low key?
Our dynos have been on tests with out full exhaust only at the moment. The HFC model has a 200 cell high flow cat on it which will still filter some emissions where the other has the cat completely removed for the highest flow possible. There should only be about a 5 HP difference between them with basic mods
Appreciate 0
      12-06-2012, 10:26 AM   #19
GTM_Challenge
GTM_Challenge's Avatar
United_States
269
Rep
2,946
Posts

Drives: E46 M3, E90 M3
Join Date: Jan 2010
Location: Nashville

iTrader: (7)

Quote:
Originally Posted by tdizzle View Post
Tune required?

I'm wondering how this would affect the PPK (assuming we can ever get it)
We have not seen any CEL for the HFC version on the current ECU version for the F30s. We tested this for about 3k miles. The catless downpipe will through a CEL and will require a tune or flash to correct.
Appreciate 0
      12-06-2012, 10:29 AM   #20
chrisv_335EBII
Second Lieutenant
10
Rep
238
Posts

Drives: 335i 6sp EBII
Join Date: Oct 2012
Location: Maryland

iTrader: (0)

When will the sport exhaust be available?
Appreciate 0
      12-06-2012, 10:43 AM   #21
GTM_Challenge
GTM_Challenge's Avatar
United_States
269
Rep
2,946
Posts

Drives: E46 M3, E90 M3
Join Date: Jan 2010
Location: Nashville

iTrader: (7)

Quote:
Originally Posted by cchrisv View Post
When will the sport exhaust be available?
We had some pre-orders that have first dibs. Beyond those, first units for stock should be in little after new years is our best estimate currently
Appreciate 0
      12-06-2012, 11:02 AM   #22
chrisv_335EBII
Second Lieutenant
10
Rep
238
Posts

Drives: 335i 6sp EBII
Join Date: Oct 2012
Location: Maryland

iTrader: (0)

PM for pricing?
Appreciate 0
Closed Thread

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 04:00 AM.




f30post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST