Sound hardly changed much... Wow

Tone? No

What really changed after HFPCs is exactly what I wanted from an aftermarket exhaust.

Burps got more noticable. Way more noticable after shifting
Dropping the rews got louder with the tone being more noticable
And speeding up from low RPM started to have more tough rumble sounds

Woot sounds same but you don't go woot 24/7, that's why I loved the cats, made the DD mode much more fun
But can't notice these changes on the videos

Well the performance increase is the next biggest plus after sound for me

I was surprised at how quiet my car still is after removing the mid-muffler and the J-pipe removing the 3rd cat. Its louder than stock but compared to something like a G35, my car is nearly silent. Looking into an after-market resonator that will add a bit of sound without any drone or rasp.

I am replacing my three catalytic converters on my 05 TL. I am keeping the stock exhaust. Should I get a V1 J-pipe that keeps the third cat or new A-pipe to make my life easier?

why waste money on a replacement, get the pre-cat deletes and get the J-pipe without the 3rd cat so you have 0 restrictions and spend less money on new catalysts.

Went to get the jpipe and hfpc's installed at a mechanic's house I know. He has a garage at his house. We installed the jpipe. He said the high flow cats would take some time, hours, to get out and install the high flows. He showed me where they were buried and I saw it may take some time to get them out.
So, I just have the j pipe for now.
I have noticed no difference in sound or performance whatsoever. My TL-s sounds the same, and when I drive it and get on it, it has no more pick up then I had before. My TL-s was already fast, and this wonderful jpipe has made no difference whatsoever...

I don't know if I should even bother putting the hfpc's in , in the event their is no change with them too, I will just have to get them all pulled back out and put the oem parts back in and sell the pipe and hfpc's.

Should I even bother? With all the one's that said how great the jpipe is, I really wonder if the HFPC's do anything. There are some on here that said the jpipe did nothing and they even lost power and I now understand that.
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If you decide to sell, contact me.

I will for sure man.

Dynos dont lie.

But people do!

That's concerning. I would assume that you'd see difference in performance with the HFPC's due to the restrictive OEM design. I'm surprised there was no change in sound with the J-pipe installed.

Yea, I am going to go ahead and get the HFPC's put in next week....

Did you reset your ECU? And generally, it takes a little driving around for the ECU to adjust to the increased airflow.

Yea, I just reset my ECU yesterday, and I will try to let it sense the changes with a little driving around and see...

So would a completely stock tl-s gain any improvements say from an xlr8 j-pipe? I don't want to add a cai or change the quad exhaust one bit. I'm all in for gaining hp/tq but I've reached the age of not wanting my car to wake up my neighbours in the morning. By just adding the jpipe itself will I experience any raspyness or drone?

No, my tl-s did not have any rasp or drone at all when I added the j pipe. I am beginning to like the jpipe, and time will tell. But, there is no noise from the jpipe. It is just for performance, if it gives any I will soon find out. It is the same sound as stock. Now, when I add my high flow cats to work with my j pipe - I will report on the sound then, should be this week. I , like you, do not want to change the tl - s quad exhaust, but the RV6 dual exhaust is a good lookin exhaust!

Almost no change in sound on my car, maybe a touch more sound at idle and full throttle. There was enough of an improvement in midrange power my son (who really isn't a car person) noticed it.

contrary to what every other poster has said.
unequal headers will give you the boxer rumble.

The Subaru rumble has less to to do with being a boxer engine and more to do with being a car fitted with unequal headers. i have been modding subarus for the last ten years and have just recently sold my own sti to pick up my sti.

When modding subarus one of our most heated debates has always been equal length headers vs unequal length. Everyone agrees that equal length makes more power but unfortunately your subaru sounds like a honda. A video is embedded in the the thread on equal vs unequal that shows the sound of a subaru boxer engine with equal length.

http://forums.nasioc.com/forums/show....php?t=1881185

an experienced exhaust pro can tune the exhaust note on your car to sound anyway you want. Just be prepared to pay big money for custom exhaust work. i paid a pretty penny to get my rumble toned down and sound more like a mix of a g35 and an sti.
www.youtube.com/embed/hcB7OsVvXYE?list=UUXQFMtzkvhb23lW23W380NA

with that all being said, don't do the rumble, i think the sound of tl v6 is sexy. Enjoy it! I'm trying very hard not to mod this car. the less i hear the engine the less i step on the gas.

Just put in the order for my v2 xlr8 j-pipe. Cannot wait until it arrives!

j-pipe all the way i love the way it sounds with stage 3 exhaust worth every dollar!

07NBP-S - youll like it ive had my xlr8 v 2 for 4 months now and couldnt be happier

This is the route I was thinking of going...

I just want my TLS to sound the way it looks. BADASS.

I don't mind putting a full cat back and j-pipe on but was hoping that I could get the desired sound from just a V2 j-pipe with the stock exhaust - I'm guessing this is not the case?

What's everybody's opinion on best bang for the buck when it comes to sound and exhaust? I'm not necessarily after performance as it will just cause me to waste more gas with my foot on the floor... but I will take it if it gets the sound this car deserves!!!

The j-pipe only alters the exhaust note slightly.

If you want sound and some performance get our XLR8 catback exhaust. If you want performance and some sound get our XLR8 V2 j-pipe.

http://hoa.excelerateperformance.com...e/g-73355.aspx

http://hoa.excelerateperformance.com...s/g-71474.aspx

I've recently installed the xlr8 v2 jpipe. While I feel the improvement overall in the car, the sound from the exhaust has barely changed. I obviously can hear it (you really need to be listening for it) but that is because I knew what it sounded like beforehand. However, I'm sure if someone else was to come for a ride with me...they wouldn't have even known as I myself am still on the stock exhaust.

Nor will the cars around you or the cops...

My setup is now, after weeks of driving , 2 HFPC's and the RV6 jpipe. All 3 of my oem cats have been deleted. My car drives smooth, low end and mid range gain, and sounds great, very smooth, not too loud at all. Love the setup. Very small smoke when first starting engine, no foul smells as with PCDs.

Just saw this. And this... is... Pretty funny.

I understand installing HFPC + RV6 Jpipe gives you performance increase on a completely stocked TLS, but was there a significant change in sound/tune ?

I'm all about the rumble sound.
Currently, I have stage 3 mods, however, I am still not satisfied with the sound..
I want more rumble tuned sound like Maserati GranTurismo...haah

Sounds great