HKS Exhaust Review on E92 - BMW 3-Series (E90 E92) Forum

riceygts · 04-25-2009, 12:36 PM

I just got this piece installed at Bavarian Exclusive. I have to thank Bobby for the wonderful service, awesome price and Duy for the smooth install.

Some initial impressions:

1. The fitment was 100% dead on.. everything lined up perfectly with no issues whatsoever. You can tell they put in their R&D time.

2. The quality of the exhaust is top notch, as to be expected from a company like HKS. From the packaging materials to the exhaust itself.. It put a smile to my face. They even include a tool to plug up and properly hide the exhaust flap vacuum hose.

3. The sound is intoxicating when pushed, but barely noticeable when at partial throttle (no drone at all). While cruising with my windows up, I can hardly tell that I've added an aftermarket exhaust. (keep in mind I have catless downpipes too!). This system is one of the quietest exhausts I've heard on this car.

4. The titanium burnt tips look pretty nice.. but that is subjective. I would think the burnt blue color would match nicely with a montego blue car.

5. I can not comment on the gains as 10-15hp is hard to feel via butt dyno especially after feeling the addition of a JB3. Grassroots motorsports magazine did do a comparison test on 335 exhaust systems (which included AE and HKS) and the HKS came up ontop with +13hp.

Here is a video of a cold start. My other mods include Injen DCI, AR catless downpipes, and JB3. The rattling sound only happens from a cold start.

[u2b]<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/BC90OliYsto&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/BC90OliYsto&hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>[/u2b]

hotrod182 · 04-25-2009, 01:08 PM

Does anyone know the weight comparison between these and the factory set up?

WCM3 · 04-25-2009, 01:27 PM

It looks and sounds great! But $1,600 still is pretty pricey..

ChaneRZ · 04-25-2009, 01:50 PM

sounds great! hks exhausts are awesome!

RiXst3r · 04-25-2009, 02:41 PM

Exhaust sounds great!

Phil335 · 04-25-2009, 05:01 PM

sounds nice. i still think im goin for the meistershaft race though. this almost changed my mind. nice exhaust though. good sound and looks!

riceygts · 04-25-2009, 11:58 PM

Quote:

Originally Posted by hotrod182

Does anyone know the weight comparison between these and the factory set up?

The difference is at least 20 lbs.. I held the stock one and that thing is a pig!

Big Tom · 04-26-2009, 04:26 AM

Quote:

Originally Posted by riceygts

Here is a video of a cold start.

Not so healthy to rev it like this on a cold engine...

scottp999 · 04-26-2009, 08:30 AM

Quote:

Originally Posted by hotrod182

Does anyone know the weight comparison between these and the factory set up?

Most aftermarket downpipe back exhausts (that remove the second set of cats) save between 20 and 30lbs over the factory setup.

AE saves 24lbs
Britalman is about 30lbs

Others are similar. One of the things I like most about the HKS system and the AE system is that they use flanges to put together the pieces instead of slip joints.

alq80 · 04-26-2009, 08:36 AM

congrats and good choice :P

riceygts · 04-27-2009, 12:59 AM

Here are the stats per grassroots motorsports magazine. Thanks to usc335 for posting it up.

Stock: 270 hp/276 lb-ft; 78 lb system weight; 95 dB peak sound
BMP Supersprint (Axle-back): 278 hp/282 lb-ft; 89 lb system weight; 96 dB peak sound
BMP Supersprint (full system): 280 hp/281 lb-ft; 57 lb system weight; 98 dB peak sound
UUC Corsa RSC335: 276 hp/283 lb-ft; 89 lb system weight; 97 dB peak sound
Borla: 280 hp/281 lb-ft; 51 lb system weight; 97 dB peak sound
Autobahn Exotics: 280 hp/282 lb-ft; 62 lb system weight; 97 dB peak sound
Bimmerworld HKS: 283 hp/284 lb-ft; 61 lb system weight; 98 dB peak sound

ra2fanatic · 04-27-2009, 01:30 AM

congrats on the new exhaust. i hate that rattle on a cold drive too...

riceygts · 04-27-2009, 08:33 PM

Quote:

Originally Posted by ra2fanatic

congrats on the new exhaust. i hate that rattle on a cold drive too...

I think the rattling is from the under brace near the rear of the car. A couple of spacers should fix it

Yoshii · 05-24-2009, 03:41 PM

looks nice...

MarkE92 · 05-24-2009, 04:52 PM

To bad Grassroots didn't test the BMW performance exhaust.... would really want to know what it puts down on the dyno.

JoeyFiasco · 05-24-2009, 07:35 PM

Quote:

Originally Posted by riceygts

Here are the stats per grassroots motorsports magazine. Thanks to usc335 for posting it up.

Stock: 270 hp/276 lb-ft; 78 lb system weight; 95 dB peak sound
BMP Supersprint (Axle-back): 278 hp/282 lb-ft; 89 lb system weight; 96 dB peak sound
BMP Supersprint (full system): 280 hp/281 lb-ft; 57 lb system weight; 98 dB peak sound
UUC Corsa RSC335: 276 hp/283 lb-ft; 89 lb system weight; 97 dB peak sound
Borla: 280 hp/281 lb-ft; 51 lb system weight; 97 dB peak sound
Autobahn Exotics: 280 hp/282 lb-ft; 62 lb system weight; 97 dB peak sound
Bimmerworld HKS: 283 hp/284 lb-ft; 61 lb system weight; 98 dB peak sound

that's pretty handy thanks. do you know if they kept changing exhausts on the same car or was it diff cars that already had the exhausts on?

McLuVan · 05-24-2009, 07:47 PM

JDM FTW!

Morpheus · 05-24-2009, 08:03 PM

is the hks dp back or cat back?

kryzeofkrayzie · 05-24-2009, 08:37 PM

It's a DP back

robbie211 · 05-24-2009, 08:53 PM

Looks great! Glad to hear the fitment is right on.

usc335 · 05-24-2009, 10:23 PM

Quote:

Originally Posted by JoeyFiasco

that's pretty handy thanks. do you know if they kept changing exhausts on the same car or was it diff cars that already had the exhausts on?

Same car that they kept changing the exhaust on.

imperium2000 · 05-25-2009, 04:28 AM

Just curious. What do people do with the OEM exhaust after installation of an aftermarket?
Do they sell it or keep it to reinstall for resale?

04-25-2009, 12:36 PM	#1
riceygts Second Lieutenant Drives: 09 N54 6MT Join Date: Apr 2007 Location: Irvine, CA Posts: 264 iTrader: (1)	HKS Exhaust Review on E92 I just got this piece installed at Bavarian Exclusive. I have to thank Bobby for the wonderful service, awesome price and Duy for the smooth install. Some initial impressions: 1. The fitment was 100% dead on.. everything lined up perfectly with no issues whatsoever. You can tell they put in their R&D time. 2. The quality of the exhaust is top notch, as to be expected from a company like HKS. From the packaging materials to the exhaust itself.. It put a smile to my face. They even include a tool to plug up and properly hide the exhaust flap vacuum hose. 3. The sound is intoxicating when pushed, but barely noticeable when at partial throttle (no drone at all). While cruising with my windows up, I can hardly tell that I've added an aftermarket exhaust. (keep in mind I have catless downpipes too!). This system is one of the quietest exhausts I've heard on this car. 4. The titanium burnt tips look pretty nice.. but that is subjective. I would think the burnt blue color would match nicely with a montego blue car. 5. I can not comment on the gains as 10-15hp is hard to feel via butt dyno especially after feeling the addition of a JB3. Grassroots motorsports magazine did do a comparison test on 335 exhaust systems (which included AE and HKS) and the HKS came up ontop with +13hp. Here is a video of a cold start. My other mods include Injen DCI, AR catless downpipes, and JB3. The rattling sound only happens from a cold start. [u2b]<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/BC90OliYsto&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/BC90OliYsto&hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>[/u2b] Last edited by riceygts; 04-25-2009 at 01:01 PM.
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04-25-2009, 01:08 PM	#2
hotrod182 . Drives: 07 335i, 06 M3 Join Date: Dec 2006 Location: California Posts: 3,425 iTrader: (0)	Does anyone know the weight comparison between these and the factory set up? __________________ 2011 Alpine 335d M-Sport 12.9 @ 108.3mph 2012 LEAF 130MPGe 2008 Black 335i Sedan. 11.11@ 129.47 mph,(8.39 sec 60-130 stock turboWR) 2008 Monaco Blue JB3 2.0 335i Coupe. 11.33 @ 132.77 mph (N54 trap speed WR) 60-130mph: 6.95 seconds stock turbo WR (.16% slope)

04-25-2009, 01:27 PM	#3
WCM3 Î canŧ főcus mŷ attėntĭon Drives: Turbo, I6, & Jeep Join Date: May 2008 Location: West Chester, Pa Posts: 1,103 iTrader: (6)	It looks and sounds great! But $1,600 still is pretty pricey.. __________________ 1995 M3 Coupe - Avus/Modena, AEM EMS, Precision Turbo, Boostlogic, H&R, Fikse FM/5, MaxVelocity, Maximum PSI, 20% Tint, etc etc.. 2009 M3 Coupe - AW/Fox Red, 6MT, Carbon Roof, Shadow Trim, etc (Sold) 2007 335i Coupe - JB3, 6MT, UR Intake, H&R Springs, Gunmetal VMR V710, Aero Lip, Carbon Trim, etc (Sold)

04-25-2009, 01:50 PM	#4
ChaneRZ If You Aint First, You're last !!! Drives: 08 BMW 335i, 01 Honda Prelude Join Date: Sep 2007 Location: California Posts: 2,495 iTrader: (0)	sounds great! hks exhausts are awesome! __________________ 08 BMW BSM 335i 6MT (Sports, Premium, NAV, PDC, AS, IPOD, HD Radio, Rear Sunshade, OEM Alarm) Angel iBright V3, Luminics Fog Bulb, Turbo Tuner, K&N Drop in Filter, Dinan Exhaust, Dinan Pedals, Vorsteiner CF Front Lip, and CF Rear Diffuser. Ordered:08/25/07 Started: 09/09/07 Finished: 09/14/07 On Ship: 09/15/07 Arrived: 10/08/07 Delivered: 10/10/07

04-26-2009, 08:36 AM	#10
alq80 Lieutenant Drives: E92 335i Join Date: Dec 2007 Location: PA / Kuwait Posts: 437 iTrader: (3)	congrats and good choice :P __________________ 335i . Montego Blue . HKS Exhaust .

04-25-2009, 02:41 PM	#5
RiXst3r Drives: www.p3cars.com Join Date: Sep 2006 Location: Ohio Posts: 6,445 iTrader: (14)	Exhaust sounds great!

04-25-2009, 05:01 PM	#6
Phil335 Major Drives: 2013 E92 335i M-Sport Join Date: Apr 2009 Location: USA Posts: 1,308 iTrader: (5)	sounds nice. i still think im goin for the meistershaft race though. this almost changed my mind. nice exhaust though. good sound and looks!

04-27-2009, 12:59 AM	#11
riceygts Second Lieutenant Drives: 09 N54 6MT Join Date: Apr 2007 Location: Irvine, CA Posts: 264 iTrader: (1)	Here are the stats per grassroots motorsports magazine. Thanks to usc335 for posting it up. Stock: 270 hp/276 lb-ft; 78 lb system weight; 95 dB peak sound BMP Supersprint (Axle-back): 278 hp/282 lb-ft; 89 lb system weight; 96 dB peak sound BMP Supersprint (full system): 280 hp/281 lb-ft; 57 lb system weight; 98 dB peak sound UUC Corsa RSC335: 276 hp/283 lb-ft; 89 lb system weight; 97 dB peak sound Borla: 280 hp/281 lb-ft; 51 lb system weight; 97 dB peak sound Autobahn Exotics: 280 hp/282 lb-ft; 62 lb system weight; 97 dB peak sound Bimmerworld HKS: 283 hp/284 lb-ft; 61 lb system weight; 98 dB peak sound

04-27-2009, 01:30 AM	#12
ra2fanatic Lieutenant General Drives: '08 AW E92 335i Join Date: Feb 2008 Location: SoCal Posts: 11,729 iTrader: (28) Garage List 2008 E92 335i Coupe [3.50]	congrats on the new exhaust. i hate that rattle on a cold drive too... __________________ JCW Body Kit ~ Volk CE28N ~ StopTech BBK ~ AEM CAI ~ Ohlins w/ Vorshlag Camber Plates ~ ///M Perf Shift Knob ~ To Be Continued...

05-24-2009, 03:41 PM	#14
Yoshii Major General Drives: 2008 Titanium Silver 335i Join Date: Jul 2008 Location: Corona, Ca Posts: 8,633 iTrader: (2)	looks nice... __________________ SOLD-2008 E90 TiAg 335i SOLD-2011 Mitsubishi Evo X 2013 F10 535i Msport, KW V3's with more Mods to come!!!

05-24-2009, 04:52 PM	#15
MarkE92 Second Lieutenant Drives: E92 335 Join Date: Aug 2008 Location: Netherlands Posts: 209 iTrader: (0)	To bad Grassroots didn't test the BMW performance exhaust.... would really want to know what it puts down on the dyno.

05-24-2009, 07:47 PM	#17
McLuVan Lieutenant General Drives: ///M3 Join Date: Jan 2008 Location: Socal~818~ Posts: 13,121 iTrader: (1)	JDM FTW! __________________

05-24-2009, 08:03 PM	#18
Morpheus Captain Drives: 335i Titanium Silver Join Date: Sep 2008 Location: Cockaigne Posts: 778 iTrader: (1)	is the hks dp back or cat back?

05-24-2009, 08:37 PM	#19
kryzeofkrayzie Enlisted Member Drives: MontegoBluE92 / Nhpdc5 Join Date: Nov 2007 Location: San Gabriel Valley Posts: 46 iTrader: (3)	It's a DP back

05-24-2009, 08:53 PM	#20
robbie211 Captain Drives: E90 335i Join Date: Mar 2006 Location: OC Posts: 800 iTrader: (16) Garage List 2007 335i [3.38]	Looks great! Glad to hear the fitment is right on.

05-25-2009, 04:28 AM	#22
imperium2000 Second Lieutenant Drives: BMW 335 Coupe Join Date: Apr 2009 Location: San Jose, CA Posts: 223 iTrader: (1)	Just curious. What do people do with the OEM exhaust after installation of an aftermarket? Do they sell it or keep it to reinstall for resale?

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