|
|
|
|
Thread Tools | Display Modes |
02-24-2008, 10:06 PM | #1 |
Scooby Guru
Member#: 141373
Join Date: Feb 2007
Chapter/Region:
E. Canada
Location: Quebec, QC
Vehicle:2022 Crosstrek Sport 6MT |
OEM vs Borla UEL header - acoustics
I need your opinions. First, when I switched from the OEM headers to unequal length Borla knock-offs, I actually failed to hear a substantial increase in rumbleness. Granted, it was there, but rather meh - the stock catback prevented from seeing a substantial difference. On the downside, the engine bay became much more noisy, due to the headers being very thin.
Now I just got an Sti catback - and I praise it for the combination of an amazing sound, rumble and also being quiet. I dont know how much of it is due to the catback, and how much to the headers, so... ...my question: for those who , drive a model in which the headers were unequal length to start with, were smarter then me and upgraded their catback BEFORE the headers, did the Borla UELs still make a difference with respect to stock? Or can I go back to stock headers, get my engine bay silent again, yet keep the rumble? Thanks!
* Registered users of the site do not see these ads.
|
02-24-2008, 10:50 PM | #2 |
Scooby Specialist
Member#: 94024
Join Date: Aug 2005
Chapter/Region:
South East
Location: Raleigh, NC
Vehicle:05 WRX CGM 95 YJ Flat black |
when i was N/A i did my catback first and it sounded decent but the borla header definitely made it sound better. I was UEL stock.
|
02-25-2008, 08:58 AM | #3 |
Scooby Newbie
Member#: 111331
Join Date: Mar 2006
Chapter/Region:
MWSOC
Location: Papillion, NE
Vehicle:2005 Impreza 2.5 RS OBP |
Hmm... well i did my entire exhaust header-back at once but i can say that the header is what creates the rumble. stock/oem manifold rumbles a tiny bit the the borla/replica really rumbles. Catback systems only make it louder. and replacing the stock cats with hfc or none (track pipe) will make it ridiculous loud.
if the op were to put the stock header on and still use the sti catback it would be pretty much the same loudness only it would not rumble/pulsate as much. |
02-25-2008, 09:41 AM | #4 |
Scooby Guru
Member#: 141373
Join Date: Feb 2007
Chapter/Region:
E. Canada
Location: Quebec, QC
Vehicle:2022 Crosstrek Sport 6MT |
thanks! As I said, I'm really happy with everything BUT the thin-metal structure of the header. Don't want to wrap it to silence it, as it seems to be rather bad for the header... hmm, maybe will come up with a funky enclosure or something...
|
02-25-2008, 11:32 AM | #5 |
Scooby Newbie
Member#: 111331
Join Date: Mar 2006
Chapter/Region:
MWSOC
Location: Papillion, NE
Vehicle:2005 Impreza 2.5 RS OBP |
you can do a wrap kit with the sealing spray if your area does not salt the roads bad. Maybe take them off and have the thermal coated buy like jet-hot or something. might quiet the headers down a bit and also help with keeping the p0420 code from tripping.
|
02-25-2008, 12:19 PM | #6 |
Scooby Specialist
Member#: 136144
Join Date: Dec 2006
Chapter/Region:
RMIC
Location: SLC, UT
Vehicle:2010 STi SWP |
OP isn't too far from me, so I can say wrapping is pretty much out of the question up here. Lots of salt for months on end.
|
02-25-2008, 12:40 PM | #7 |
Scooby Guru
Member#: 36333
Join Date: May 2003
Chapter/Region:
NESIC
Location: East Kingston NH
Vehicle:98 RS GT30R, closed deck madnes |
I have an STI catback on my ej22 98 Legacy L. Along with the short ram intake the exhaust is the PERFECT volume for my dailer driver.....nice and quiet when cruising, yet when you get on it it produces a nice deep roar... I can only imagine running the Borla headers.
would they make the car any louder ??? |
02-25-2008, 01:54 PM | #8 |
Scooby Guru
Member#: 141373
Join Date: Feb 2007
Chapter/Region:
E. Canada
Location: Quebec, QC
Vehicle:2022 Crosstrek Sport 6MT |
Not from the exhaust side. Though after youtubing the sounds of an STi catback + OEM vs Sti catback + Borla, there IS a difference.
The main increase in the volume is from the engine bay ... the headers are just soooo thin! |
02-25-2008, 04:44 PM | #9 |
Scooby Specialist
Member#: 118334
Join Date: Jun 2006
Chapter/Region:
SWIC
Location: IT'SOKIFYOUDON'TGETIT!
Vehicle:2006 Red GDA-F 2005 Aspen White GDA-E |
i was surprised to look underneath my car this weekend [05 rs] to find that i dont have UEL headers iirc the 02-05 RS' had UELs?
|
02-25-2008, 04:55 PM | #10 |
Scooby Specialist
Member#: 136144
Join Date: Dec 2006
Chapter/Region:
RMIC
Location: SLC, UT
Vehicle:2010 STi SWP |
I believe they are un-equal, just not to the extent that the Borla's are.
|
02-25-2008, 04:57 PM | #11 |
Scooby Specialist
Member#: 109882
Join Date: Mar 2006
Chapter/Region:
E. Canada
Location: Ontario, Canada
Vehicle:2006 2.5i wagon 2011 Ford Flex |
Well this thread is making me a little worried as I have a RT cat and borla headers waiting to go on. Now I am worried it may be to loud.
|
02-25-2008, 04:59 PM | #12 | |
Scooby Specialist
Member#: 123295
Join Date: Aug 2006
Chapter/Region:
TXIC
Location: Midland, TX
Vehicle:2001 2.5RS w/ EJ257, 6-speed, Brembos |
Quote:
You will have a little bit of rumble with your STI catback but not as much as you currently have. Most of the rumble comes from the Borla style header. |
|
02-25-2008, 04:59 PM | #13 | |
Scooby Guru
Member#: 36333
Join Date: May 2003
Chapter/Region:
NESIC
Location: East Kingston NH
Vehicle:98 RS GT30R, closed deck madnes |
Quote:
you would gain some AWESOME sound by switching to a borla header in your car especialy |
|
02-25-2008, 05:09 PM | #14 |
Scooby Specialist
Member#: 160991
Join Date: Oct 2007
Chapter/Region:
MWSOC
Location: Gorillaoffroadcompany.com
Vehicle:05 Corn Burner Dirt Silver? |
I have a brand new cosmoracing SRI, blue in color,if anyone is interested. PM me.
|
02-25-2008, 07:04 PM | #15 |
Scooby Specialist
Member#: 134819
Join Date: Dec 2006
Chapter/Region:
NESIC
Location: Torrington CT
Vehicle:2005 Ford F150 FX4 ......................... |
just put borla UEL headers on my DOHC Leg GT, mated with stock midpipe and SPT Performance Muffler. The rumble is sweet on low RPM's but under throttle my intake deletes all sound. Im getting a louder muffler soon and keeping the SPT as a back-up. The intake may also be coming off if the rumble sounds good with the louder muffler.(which it will)
|
02-25-2008, 10:00 PM | #16 |
Scooby Specialist
Member#: 165749
Join Date: Dec 2007
Location: Detroit, MF'er!
|
the 06/07 2.5i is EL factory exhaust manifold (or header if you wish). they might not be excatly EL, but they are tuned somewhat to help the engine make power and it seems to be accepted knowledge that this was one important change that allowed SOA to make the few extra ponies on the 06/07's
|
02-25-2008, 10:32 PM | #17 |
Scooby Guru
Member#: 3687
Join Date: Jan 2001
Chapter/Region:
MWSOC
Location: St. Paul, MN
Vehicle:MY99 GF4 JDM 6spd NF Performance |
From running a couple of catback exhausts with header setup, this is what I can say.
Granted this is NOT the Borla headers, but some headers I made for my single port 2.2L Impreza. The catback section for NA's you'd have to put in a resonator along with a MUFFLER at the end if you don't want the raspiness. This applies to straight-through mufflers especially. Baffle mufflers are quieter. Headers made the sound, anything after that MUFFLES it to how LOUD you want it to be. I have one of the LOUDEST NA exhaust at the time, DEEP non-raspy when HOT, and you can hear it 1/4mi blocks away. I DO miss it in a way. This is the vid: |
02-26-2008, 10:51 AM | #18 |
Scooby Specialist
Member#: 102812
Join Date: Dec 2005
Chapter/Region:
Tri-State
Location: North Jersey
Vehicle:18 WRX Dark Grey Metallic |
wrapping the borlas/borla replicas makes almost all of that under hood noise disappear...plus it will help gas mileage a little by keeping the exhaust velocity up
|
02-26-2008, 10:59 AM | #19 |
Scooby Guru
Member#: 36333
Join Date: May 2003
Chapter/Region:
NESIC
Location: East Kingston NH
Vehicle:98 RS GT30R, closed deck madnes |
Quote:
you ever get bothered by the cops at all ?? |
02-26-2008, 11:30 AM | #20 | |
Scooby Guru
Member#: 141373
Join Date: Feb 2007
Chapter/Region:
E. Canada
Location: Quebec, QC
Vehicle:2022 Crosstrek Sport 6MT |
Quote:
Not to mention the entire drop of oil + wrapping = fireball issue... |
|
02-26-2008, 11:35 AM | #21 |
Scooby Newbie
Member#: 111331
Join Date: Mar 2006
Chapter/Region:
MWSOC
Location: Papillion, NE
Vehicle:2005 Impreza 2.5 RS OBP |
It will be loud on hard accel but it will make you . I have the stromung single hfc pipe and i think the RT pipe has 2 hfc. Mine is quite tame at cruising rpms and almost not noticeable on the highway/interstate. Just don't romp on it around cops, especially if they are tards in your area, you'll be fine.
|
02-26-2008, 12:26 PM | #22 |
Scooby Specialist
Member#: 102812
Join Date: Dec 2005
Chapter/Region:
Tri-State
Location: North Jersey
Vehicle:18 WRX Dark Grey Metallic |
gotta spray em so they don't turn into a wick...i got my wrap in a kit with spray and metal bands...also putting a skidplate under em, so hopefully that will keep alot of the salt and **** off
|
02-26-2008, 01:19 PM | #23 |
Scooby Guru
Member#: 36333
Join Date: May 2003
Chapter/Region:
NESIC
Location: East Kingston NH
Vehicle:98 RS GT30R, closed deck madnes |
|
02-26-2008, 02:50 PM | #24 |
Scooby Specialist
Member#: 118334
Join Date: Jun 2006
Chapter/Region:
SWIC
Location: IT'SOKIFYOUDON'TGETIT!
Vehicle:2006 Red GDA-F 2005 Aspen White GDA-E |
yeah i think im going to pick up a set but not right now as im more focused on suspension and braking
|
02-26-2008, 05:58 PM | #25 | |
Scooby Guru
Member#: 3687
Join Date: Jan 2001
Chapter/Region:
MWSOC
Location: St. Paul, MN
Vehicle:MY99 GF4 JDM 6spd NF Performance |
Quote:
I'll contact the person who has it at the moment. He's got the headers on his OBS. I want to hear that thing again!! |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
WTT Stromung NA Catback/Borla UEL Headers for Stock Catback/Headers Plus Cash | chop204 | Engine/Power/Exhaust | 14 | 04-05-2010 11:46 AM |
Borla UEL Headers. Unknown Divorced DP. Immaculate! | ChronoX720 | Engine/Power/Exhaust | 46 | 04-18-2009 11:55 AM |
Stock Header VS. Borla UEL | Gr3en | Normally Aspirated Powertrain | 6 | 04-17-2009 09:36 AM |
Borla UEL Headers ? | chop204 | Normally Aspirated Powertrain | 8 | 02-12-2009 02:04 AM |
NJ: GC jet-hot coated borla UEL headers and stock headers | M E R C U R Y | Tri-State Area Private Classifieds | 1 | 05-12-2008 01:58 PM |