The article houdni posted is the one I was talking about.

Neat stuff.

 

Equal length for me...I don't miss the rumble at all...I actually like the "Porsche on Steroids" sound that the EL Header help to make on our cars...

I've owned

04 STI...
GT Spec UEL Header with 3bolt flange proprietary up-pipe
APS EL header with Velocity Stack Up-pipe
05 STI...
Perrin EL Header and APS cast iron up-pipe
06 WRX...
back to APS EL header with Velocity Stack Up-pipe


Each of the cars made great power with the addition of the EL header...I really like the APS header design 4-2-1...Perrin worked great also. Several members are running the Fujitsubo...nice!

 

I'll be running the Perrin EL with Grimmspeed MV-S 38mm EWG.

 

Yeah, that will be a nice setup Lorenzo...good gains...

It will be interesting to see the power our cars make at the March PDX Tune...your's with an FPRed and mine with an FPGreen...similar engines and aftermarket mods...even the PPG gears!

 

I also run Perrin EL and think the car just sounds nasty.

 

I do like equal length sound than unequal... my friend have an Perrin EL and the car sound much more "powerful and precise" :P

 

^^^Thatʻs what I like to hear! Good things about the Perrin EL.
I wonder how it is going to sound with my TRUST DD exhaust.

 

Brent is this a Hint?

 

Sup lo! Never seen ur car since the last time at chads...it must be a monster now! Both u n Brent got nice cars...I like the sound of Brents car...how's the trust sound compared to the Aps?

 

from what i remember browsing through a Tomei catalog, i believe that the UEL headers provided just-slightly-better peak torque and at a slightly earlier RPM, whereas the EL headers provided better HP.

maybe if someone has Tomei's advertisement imaged, they can post it.

and, as others have mentioned, the sound difference...

 

Trust sound good...

 

Believe me...the Trust exhaust sounds awesome with the the Perrin Header...I know, I had it on an 05STI...unlike any exhaust I've heard. The only issue is that at a certain RPM range, it resonates and seems soo loud that your ears kind of feel like they are ringing...eh...minor details. Awesome Exhaust!

 

Yeah one of the resonators are irritating. It's the rear one. It gives off a cracking noise.

 

Hmmm...no cracking sound when I had it...not sure. Did something come loose in the rear resonator?

 

I couldnt imagine a UEL choppy airflow helping a turbo spin at any RPM. You have different temperatures of air coming together creating turbulance.

The UEL only thing it will help...is help you get pulled over.