Quietest Twin 3"

[Jesterarts]

Yeah, it's another bloody exhaust thread, but with a twist.

I have a Clubsport with a cammed LS2 in it.

As an exhaust, it's currently running:

Pacemaker 4 to 1 headers: Great
Pacemaker 3" in and out cats: Great
Twin 3" Mild Steel X-Force: This is where is goes a bit pear shaped

Basically, the thing is too loud for my liking.

At the moment when I start it up it's a little bit loud, and when I get on the throttle is screams.

What I'm after is a nice deep idle and a growl, rather than scream, when giving it something to think about.

So, I want to put sometihng else in that will quieten it down compared to the x-force and give a deeper note.

I've been looking at a Manta system, but wanted input on which systems have a reputation as being the quietest.

[255-LS1]

difilippo is all you need

deep muffled refined note.

[poolkeeper]

difilippo is all you need

deep muffled refined note.

+ 2

Or you could try squeeze in some more mufflers in the system....

[Evman]

+3

10 chars

[Stewge]

+4.

DF twin 2.5" on my VZ Clubby (cammed as well so should be similar). Nice deep sound but still pretty loud if you sink the foot. Unfortunately I think that basically comes with the cam territory.

Short of putty stock mufflers or varex on I don't think it's as simple as making it "quieter":confused:

[185iboy]

DF or get a Varex! Mate's Cammed GTS had massive noise issues with the same exhaust as you Jesterarts. Varex muffler took most of the bite from the noise and sounds pretty tame from the back and wouldn't really get any attention in normal driving. Only opens it up when he's out of the city and it's great.

[VXSS346]

+4.



+5. :closed:

[kayman]

pacemakers twin 3 inch isnt bad either.

Stock LS2 with only the twin 3 inch catback.

YouTube - ‪VE Senator Pacemaker Catback‬‏

[1BEAST2NV]

^^ yeah but add high flows and pacemaker 4-1's into that and the note changes all together....and alot louder then just a cat back.

[VK871]

difilippo is all you need

deep muffled refined note.

+6. I have heard Di Filippo and X-Force systems and Di Filippo systems are deeper in their note.

[QldKev]

difilippo is all you need

deep muffled refined note.

+ deep pockets :eyes:

[BLACK 346]

I replaced the Straight through mufflers on mine with chambered mufflers. This quietened it down a bit and made the not deeper. This is on a heads and cam LS1 with a 226/234 @ 110 cam. Truth be told though, I think it is pretty hard to make an LS engine with a decent sized stick sound like it hasn't :)

[macca33]

Another vote for the D/F twin 3" - deep, refined and no drone.

cheers

[LuisS]

Try to delay whatever you are thinking of doing for as long as you can , we have something coming out real soon that will fix your issues :)

[fishla]

+1000 for D/F

In a VT - VZ, it's awesome!!

[255-LS1]

+ deep pockets :eyes:

yer but you will never have to revist your pockets for another exhaust like so many xforce buyers have done so. you get what you pay for.

case closed

[Wonky]

Try to delay whatever you are thinking of doing for as long as you can , we have something coming out real soon that will fix your issues :)

Sounds very interesting Luis!! :goodjob: For VE as well or just VT-VZ? :confused:

To the OP - I see the DF fanboys have all had their say but (IMHO) they seem to have missed the title and key point of the thread. I agree that on VT-VZ the DF systems are the bees knees, but I don't think anyone who has one, especially on a cammed car, could describe them as quiet! :confused:

They will certainly have a deeper, more refined note though, so if that is really the priority more so than significantly reducing noise then that's one way to go. The other is a Sureflo 3.5" system which come in a range of options from quiet through to loud and all of those I've heard sound tuff as!! :yup: However, as you'll see in the also current Sureflo thread (http://www.ls1.com.au/forum/showthread.php?t=150348) there seems to be a split between pro and anti Sureflo people, so read and make up your own mind.

[AllWheelSlide]

Try to delay whatever you are thinking of doing for as long as you can , we have something coming out real soon that will fix your issues :)

Hmmm .... Tell us more. I seem to recall another thread on bimodal(s) with a similar stay tuned entry.

[macca33]

Sounds very interesting Luis!! :goodjob: For VE as well or just VT-VZ? :confused:

To the OP - I see the DF fanboys have all had their say but (IMHO) they seem to have missed the title and key point of the thread. I agree that on VT-VZ the DF systems are the bees knees, but I don't think anyone who has one, especially on a cammed car, could describe them as quiet! :confused:




MUCH quieter than the other main comparison Wonks - that being an X-Force system...and KPM won't box their 3" system up and ship them for fitment, as they do for the VEs.



:goodjob: DiFilippo!!!

[v8dude78]

Try to delay whatever you are thinking of doing for as long as you can , we have something coming out real soon that will fix your issues :)

:yup: +1

[Jesterarts]

Try to delay whatever you are thinking of doing for as long as you can , we have something coming out real soon that will fix your issues :)

Haha... ok will do...

[DJR_VY]

difilippo FTW :) :D

[Jesterarts]

Any other systems than difillipo that people have had good experience with?

Manta, Pacemaker, Remus, Redback, Hurricane?

Or is difillipo the be all and all?

[poolkeeper]

Any other systems than difillipo that people have had good experience with?

Manta, Pacemaker, Remus, Redback, Hurricane?

Or is difillipo the be all and all?

looks like it! :goodtime: lol

[Stewge]

Hmmm .... Tell us more. I seem to recall another thread on bimodal(s) with a similar stay tuned entry.
I'd also be very interested in this. If it were some form of automated bi-modal/varex type system I'm assuming it would also make it ADR compliant (at least on the noise/volume part)?

[ADAM 26]

plenty of other systems out there mate.

even get a custom system made to suit your needs??

[255-LS1]

Any other systems than difillipo that people have had good experience with?

Manta, Pacemaker, Remus, Redback, Hurricane?

Or is difillipo the be all and all?

its not the be all end all BUT it is proven time and time again to deliver exactly what you want. You could try one of the other mentioned and still not be happy and end up with $$$ down the drain. Trouble is everyone has an opinion and thinks this is the best or DF is shit cos they are to expensive etc

Best to listen to one before you buy mate to make sure you are happy and it is what you want.

[Jesterarts]

My understanding of ADR compliance is that if it was to pass, it would have to pass EPA noise restriction in it's open "LOUD" state.

Still, I am eargerly waiting on the news APS will have "soon". :)

[255-LS1]

My understanding of ADR compliance is that if it was to pass, it would have to pass EPA noise restriction in it's open "LOUD" state.

Still, I am eargerly waiting on the news APS will have "soon". :)

the ADR compliance will state certain conditions for the noise test, i.e x db at x rpm for x time, so if you can comply with this, then anything outside of the test conditions is not considered for the test.

[ebbett21]

Any other systems than difillipo that people have had good experience with?

Manta, Pacemaker, Remus, Redback, Hurricane?

Or is difillipo the be all and all?

If you want a quiet but nice note,the remus is by far the pick of the bunch. Another option not mentioned on this thread is a Hitech system there systems are supposedly legal and produce a awesome sound

[Wonky]

If you want a quiet but nice note,the remus is by far the pick of the bunch. Another option not mentioned on this thread is a Hitech system there systems are supposedly legal and produce a awesome sound

Given that to most of us an awesome sounding exhaust equates to some degree of loudness then I can't see how anything that's legal could sound awesome, unless it's a bimodal setup like the AMG C63. :drool:

[Jesterarts]

If you want a quiet but nice note,the remus is by far the pick of the bunch. Another option not mentioned on this thread is a Hitech system there systems are supposedly legal and produce a awesome sound

Cheers. I will investigate Hitech... ;)

[ebbett21]

Given that to most of us an awesome sounding exhaust equates to some degree of loudness then I can't see how anything that's legal could sound awesome, unless it's a bimodal setup like the AMG C63. :drool:


doesnt have to be loud to sound awesome. How loud is a KPM twin 2.5'' system?

[Black VU SS ute]

good mufflers and reso, helps heaps, I got pacey's 4 to 1 all 2 1/5 with magnaflow 100cpi cats and 14" mufflers and (16"reso i think) its loud but nice and quiet while cruizing (with big cam) give it shit and its loud and deep :)

[Wonky]

doesnt have to be loud to sound awesome. How loud is a KPM twin 2.5'' system?

Not as loud as their twin 3" but still well over the legal limit. :D

[HERCULES]

KPM 3" is loud! But in my opinion the 2.5" is a lot quieter.

[amckiwi]

Another option not mentioned on this thread is a Hitech system there systems are supposedly legal and produce a awesome sound

Applies to 2.5 inch only 3 is loud

Stu

[SS-355]

Guys we are talking about twin 3" systems on 345+ cubes of v8 making 400+ hp. It is going to be loud when on the go pedal no matter which system you buy. The key is to get a quality system that is acceptable whilst day to day driving hence why the df is so popular. The whole varex thing is a :jerk: to me,why spend thousands on mods such as cams,blowers,headers and the such only to choke the thing majority of the time. From memory the factory 2 1/4" squashed system on my ss ute was pretty quite,just my thoughts!

[white lie]

The Manta systems aren't bad at all. I'll be using one over the DF for half the price! Just like DF, Manta are also deep and drone free.

Why does everyone think DF is the be all, end all for a VT-VZ system, but when it comes to VE's, there's plenty of better choices out there?

[SS-355]

Df definately not the be all and end all but they do sound the goods and make the power although at a premium.

[klink]

I would look at the cats as when i changed them to metal ones it changed the note above 3000rpm

[Jesterarts]

Good to see some good debate going on.

Also good to see people giving some replies including a "why" and "how" rather than the standard:

"+10 DF FTW"

In regards to the custom option. What are to cons and pro's?

How much would I expect to pay for a decent custom twin 3" S/Steel catback?

Essentially, money is not an issue for me but I don't want to pay more than I have to.

I'm willing to spend money, not waste it.

[aratic]

Why not go a 3.5" Sureflo? You can customise how loud you want it.

Although not a twin 3", I have a twin DF 2.5" on my VY and the ground clearance is pretty poor (cant imagine the 3" is any better). My car has only been lowered 30mm or so and I scrap over every speed hump in upper floor mall carparks, which isn't that cool

[poolkeeper]

I dont you really need a 3" with your listed mods? Also considering you are asking for a quiet exhaust system..

[beno]

I dont you really need a 3" with your listed mods? Also considering you are asking for a quiet exhaust system..

Agreed.. usually you only need a twin 3" once you have around 280+rwkw. How much are you making??
as for price, a DF twin 3" s\steel catback are usually over $2000 (new).

[Jesterarts]

Agreed.. usually you only need a twin 3" once you have around 280+rwkw. How much are you making??
as for price, a DF twin 3" s\steel catback are usually over $2000 (new).

The shop that did all the work adnd tuning said they got 335rwkw out of it.

Twin 3" DF catback in S/Steel is about $1800 from the quotes I've received.

Still, $1800 is a bit of coin, so I want to make sure I get best bang for buck thus this thread.

If DF turns out to be the best option then I can justify the cost but it people are getting good results with something else then I'll explore that.

[rosey]

I love my twin 3" difilippo system, doesn't drone, not offensively loud and has a brilliant deep note. Sure they are expensive but you're paying for quality after all.

[ebbett21]

I think because you have a fairly lumpy cam, any twin 3'' system will be over the legal limit. However your main problem is the xforce, they are the loudest off the shelf system on the market and you either can live with the sound level or not. Ive been in your shoes, and ended up going to a single 3'' system on a LS3 VT2 and it performs pretty good, and i can chop and change the rear muffler as i get bored with the note, currently has a flowmaster super 44 and twice as deep as a diffillipo.

[Jesterarts]

I think because you have a fairly lumpy cam, any twin 3'' system will be over the legal limit. However your main problem is the xforce, they are the loudest off the shelf system on the market and you either can live with the sound level or not. Ive been in your shoes, and ended up going to a single 3'' system on a LS3 VT2 and it performs pretty good, and i can chop and change the rear muffler as i get bored with the note, currently has a flowmaster super 44 and twice as deep as a diffillipo.

That is correct, my main problem is definately the Xforce... haha.

I'm not sure about going a single system. I think I definately prefer the sound of dual systems.

My mate has a monaro and a true dual system on it, as in no merges or crossovers at any point and I personally thing it sounds amazing.

Thus why I was sort of leaning towards the pacemaker/manta systems as they come with just a crossover and not a full blow merge. Get a more classic muscle note from them IMO.

Like a very distinct sound from each pipe I guess.

[ADAM 26]

i had a single 3.5 inch sureflow system on my cam and headed ls1, the sound was not overly loud but a nice deep rumble.

i changed to a twin 3 inch x-force system, and it was LOUD, like supercar loud. had a high pitch scream at higher rpm.

i loved it loud, but the differnce on the dyno was.............




+2 rwkw!

went from 308-310kw. i didnt change it to get power or sound, my sureflow got damaged, and the x-force was cheap and local. so i got it.

the 3.5 inch sound better than difillipo to me, but everyone is different.

[BLACKVE]

$1620 on ebay for 3" difilppo

http://www.ebay.com.au/itm/DI-FILIPPO-COMMODORE-VT-VX-VY-VZ-SS-V8-SPORTS-EXHAUST-/260756838097?pt=AU_Car_Parts_Accessories&hash=item3cb65196d1

[scorpion]

Have similar set up on my VE GTS, the Xforce was too loud. I put in a centre resonator and also hot dogs before the mufflers. I did also change the mufflers to the Walkinshaw sport mufflers (not bimodal). Still have 327rwks and do this at 88Db.

I experience NO drone inside the cabin and can talk confortably on the hands free which I couldnt do before. I'm happy with the result.

[LSS7]

The system on my car produces 90db, 1 meter @3800 rpm (EPA standard test)

Not exactly a Twin 3" system as you are enquiring about tho.

VTII - VZ
1 7/8 Pacemakers,
100cpsi 3.5 inch cats,
3 inch twin inlet , single muffler,
2.5 inch twin mufflers
2.5 inch twin inlet large rear single muffler

It produces 485rwkw @ 12psi through a power draining truck auto and 3500 converter on 98 octane pump fuel.

Under cruising conditions and light throttle the system is undetectable from a stock exhaust.

At 50% throttle but still under vacum the car sounds like a well tuned and balanced V8 with an exhaust system.

Over 50% throttle and under boost it sounds like a race car.

The trick is in the design of the muffler internals and externals ad ons.

The system has been designed and developed by Hitech Mufflers in Sydney.

So I recommend to just add some mufflers on your existing system and save your money and achieve what you are after.

PM me for more details.

[tunga]

[quote=kayman;1917841]pacemakers twin 3 inch isnt bad either.

Stock LS2 with only the twin 3 inch catback.



Sounds great i have a 2007 senator and want to get more growl ,could i ask do you get the dreaded drone at highway ? cheers

[kayman]

[quote=kayman;1917841]pacemakers twin 3 inch isnt bad either.

Stock LS2 with only the twin 3 inch catback.



Sounds great i have a 2007 senator and want to get more growl ,could i ask do you get the dreaded drone at highway ? cheers

There is a little bit of drone but you only really notice it when everything is silent in the interior (ie radio off).

I did however just receive a letter in the main from the EPA... yet to get it tested.

[charlie15]

My DF isnt quiet at all. BUT it sounds great. Wouldn't have it any other way.

[Jesterarts]

Hey, haven't checked this thread for a while.

Some updats on my end.

Went to an exhaust place, popped the car on the hoist to have a look and discovered that the headers adn cats are only 2.5". Only xforce catback is a twin 3".

So, my ultimate decision is to go for a twin 2.5" system. At the moment I am leaning towards a Manta system with all mufflers.

I've listened to them online and talked to a few people who are running them and nothing but positive feedback.

That and the fact I am able to get them for a very good price.

Just have to wait till October when I move into my new place now because a the current place the tips scrap the driveway and I don't want to go throwing on a new system and scratching it.

Cheers.

[OPTIMUS]

ive just come from DF 2.5" to Manta 2.5" the manta at idle is alot quieter and would imagine this would also be the case for 3" both very well made exhausts, DF wins on sound and deepness Manta close but alot cheaper in price.

[Jesterarts]

ive just come from DF 2.5" to Manta 2.5" the manta at idle is alot quieter and would imagine this would also be the case for 3" both very well made exhausts, DF wins on sound and deepness Manta close but alot cheaper in price.

Hey mate, you happen to have any video/sound clips of your manta?

Did you get the system with the muffler/muffler combo or?

Keen to hear another one.

[kayman]

Well got my pacemaker catback tested yesterday and it just passed at 3800 but on backoff it failed by 5db.

Sent from my GT-I9100 using Tapatalk

[Jesterarts]

Video clip??

[BlackBruteUte]

I have a hitech system and then got the car cammed afterwards it would sound great to 3000rpm then it would scream all the way to cutout. It was wicked but ended up to load for the street. Back to hitech they added twin long resonators and now it sounds awesome. They have been doing systems for so long and are happy to modify a system to suit what you are after!