xforce 2.5 quiet??

[skippy2000]

guys recently had to get my car passed by the epa.... Im looking at getting an exhaust that is not over the top with noise card mods cam /otr/ tune .... the exhaust i got defected with was athe original system but had resignators cut out and different mufflers (i brought it like this) so im wondering if the xforce 2.5 sytem will be considerable quieter??? is it droany in the cabin etc ... I know it will be louder than the leagal limit (90db) but will i really get picked on for 92-94 db?? like is it really that noticeable?? any advise and please dont suggest Varex as its the first thing a cop lookes for which is a defect anyway .... Would be greatfull on any opinions...

[boggers007]

I had a full xforce 2.5inch s/s system on my VE SS and i liked it, wasnt overly loud especially when cruising or just idling but when u planted it you knew it was there and it gave a nice note. I used to drop gears and drive it past cops to see if they would care but they never even looked twice at me.

[sixlta]

I found that my 2.5 inch was louder than my 3 inch xfarce, only difference was at wot,

Look at the vcm 3 inch if running standard headers and cats, or hsv headers and cats, was bloody quiet but had a great sound,
If ya looking for more sound, throw a set of extractors and 200cpi cats,

[JT]

what model car do you have? I had Xforce 2.5" on my VX which got EPA'd for noise & it also droned

[skippy2000]

Sorry guys its a ve ss

[Plenty]

Sorry guys its a ve ss

KPM 2.5" :bow:
The only answer!

[Knawful]

2.5 Xforce here, (cam etc), yet to be hassled, @ breatho's i get comment's saying how nice it sound's...BUT, this is in rural VIC.


Edit: ... i've never been pulled up in Melb's either when i'm up there for weekend's come to think of it.

[GKW]

I had a full xforce 2.5inch s/s system on my VE SS and i liked it, wasnt overly loud especially when cruising or just idling but when u planted it you knew it was there and it gave a nice note. I used to drop gears and drive it past cops to see if they would care but they never even looked twice at me.

Totally agree with the above. Mine give has great burble at idle, but plant it it howls!

[701let]

I have a x force 2.5 catback on my manual ssv and I HATE it!!!! Is 'boomy' in the cabin and drones while cruising.. It has actually made me dislike driving the car put it that way and I've put the car up for sale but if I keep it I will def either spend the money on a decent system or go back to stock

[Plenty]

I have a x force 2.5 catback on my manual ssv and I HATE it!!!! Is 'boomy' in the cabin and drones while cruising.. It has actually made me dislike driving the car put it that way and I've put the car up for sale but if I keep it I will def either spend the money on a decent system or go back to stock

It gets mentioned here all the time you buy cheap and you get issues, Go the KPM or a VCM system they are great with NO DRONE!
They may cost a little more but in the end your a happy person.

[B1n0ry]

From what I can tell the Redback twin 2.5" is reasonaly quiet if noise level is an issue... like if you are being tested by the EPA. It may not be 90dba exactly, but it will be closer than most.

[Knawful]

I have a x force 2.5 catback on my manual ssv and I HATE it!!!! Is 'boomy' in the cabin and drones while cruising.. It has actually made me dislike driving the car put it that way and I've put the car up for sale but if I keep it I will def either spend the money on a decent system or go back to stock

My idea of drone must be different, no drone at all, no matter what speed i'm doing.

Maybe the people who "suffer" drone are in to high a gear for the speed theyre doing. :shrug:

[black-ss]

so im wondering if the xforce 2.5 sytem will be considerable quieter??? is it droany in the cabin etc...

Mate I bought my car with pacie 4in1s, and an XForce 2.5inch with standard cats, I changed the cats to Outlaw 4" body, 2.5"in/out because I wasn't happy with the sound and this is how it sounds inside from 30km to 100km now, left TC on god that annoys me...

YouTube - VY SS Exhaust Sound In Car

It's OK, pretty quiet on idle, sounds a bit droney when driving it normally through the gears, I will probably change it further down the track

Hope this helps :)

EDIT - stock LS1 btw...

[justin_d]

Speak to Sureflo as they'll give you a good product to match what you want. Too many negative X-Force comments on here for me to support them and you do get what you pay for.

[701let]

My idea of drone must be different, no drone at all, no matter what speed i'm doing.

Maybe the people who "suffer" drone are in to high a gear for the speed theyre doing. :shrug:

I don't drive around in 6th doing 70 if that's what you mean.. Put it this way I hate having people in the back as it's louder in there and I've had many people comment about the drone while sitting in there... It has seriously made me stop driving the car...

Anyway IMO I would certainly never get one again...

[Plenty]

I don't drive around in 6th doing 70 if that's what you mean.. Put it this way I hate having people in the back as it's louder in there and I've had many people comment about the drone while sitting in there... It has seriously made me stop driving the car...

Anyway IMO I would certainly never get one again...

Not being able to drive around in the highest gear is stupid, my KPM system, 6th gear in an AFM car at 64km/h and no drone, none at all and that's with AFM.
VCM also guarantees no drone with their system as well.
One way to reduce the drone in yours would be to fill the spare tyre well with padding or sound deadening of some sort it's where alot of the drone originates.

[701let]

Thanks mate but depending on what I do with the car ill probably get a kpm, or an f1 exhaust from mr muffler.. Cheers

[debencha]

recently put a 2.5 on the ve ute with hsv headers and cats.
still very quiet until you stand on it
havent noticed any drone at cruise speeds
620 deliverd off ebay.

[Craig93]

I had a 2.5" xforce on my VE SS SEdan manual and if anything it was too quiet i couldnt even tell it was on the car on the inside and never experienced any drone issues. Same goes for the 3" i have on it now.

[SIR_SKITZ]

I just fit up an Xforce 2.5in CB system to my 08 M6 SS, have had no worries about drone what so ever, it gives a bit of a note inside the car when you bury your foot, but it's barely, if at all, noticeable when at speed in the correct gear at 60, 80, 110km/h, I actually wouldnt mind it a bit louder!!! LOL

I've barely done 500km since fitting the CB system, so It will no doubt become a little louder, I guess time will tell...

[smokey777]

It gets mentioned here all the time you buy cheap and you get issues, Go the KPM or a VCM system they are great with NO DRONE!
They may cost a little more but in the end your a happy person.
I always find it funny you say it gets mentioned "all" the time but i went to a dyno night & people were tellin me it was nicest sounding car there i also get alot of comments but it has all the so called wrong parts. 2.5" xforce catback pacey tri-ys & non descript after market cats. So i dont get your statment?

[scorpion]

I have a full 2.5 inch Xforce on my VE GTS. My system also has a 20 inch centre resonator, hotdogs on each pipe and Walkinshaw mufflers. There is no cabin drone and inside the car I can hear tyre noise when crusing at highway speeds. On the dyno the car does 330rwkws so the resonator, hotdogs and mufflers havent hurt performance at all. Be careful with the exhaust, if you go for a "straight through" option it will likely be over 90db.

The Walkinshaw mufflers arent cheap, however the sound is good and they helped acheive compliance with the "noise" guidelines.

[ebbett21]

I always find it funny you say it gets mentioned "all" the time but i went to a dyno night & people were tellin me it was nicest sounding car there i also get alot of comments but it has all the so called wrong parts. 2.5" xforce catback pacey tri-ys & non descript after market cats. So i dont get your statment?

Because it costs an arm and a leg, an absolute fortune, it no doubt sounds the best and perform better than any other system on the market!!!
But i doubt theres a handful of Kws between all aftermarket systems and for sounds, well everyone says there system sounds awesome.

[Plenty]

I always find it funny you say it gets mentioned "all" the time but i went to a dyno night & people were tellin me it was nicest sounding car there i also get alot of comments but it has all the so called wrong parts. 2.5" xforce catback pacey tri-ys & non descript after market cats. So i dont get your statment?

They have obviously never listened to a KPM or VCM, Xforce IMO rattles and sounds tinny under WOT and of course will drone terribly in an AFM car.

Not to offend anyone that has bought the best they could afford but there are plenty of forum members that have gone from an Xforce to say a KPM, but not once have i heard of someone going the other way. :teach:

[burkey]

I don't know about quiet! Ive got 4-1 with 2.5 xforce. I have to start my car half way down the road so I don't wake the family.
In regards to being "tinny" I haven't heard another exhaust to compare it too.

[amckiwi]

HM / Perry is another catback that will not drone in 2.5 inch

Try and get a listen to / ride in some cars if you can

Stu

[ebbett21]

They have obviously never listened to a KPM or VCM, Xforce IMO rattles and sounds tinny under WOT and of course will drone terribly in an AFM car.

Not to offend anyone that has bought the best they could afford but there are plenty of forum members that have gone from an Xforce to say a KPM, but not once have i heard of someone going the other way. :teach:

Bulls@#t, utter rubbish, I went for a cruise in a blown clubby with a full xforce twin 2.5'' system a week ago and sounds almost quiet.
in the cabin no drone, as for sound well maybe you shouldnt waste your money, tinny yea right, its statements like that make me laugh haha, get your facts right pal. Im sure performance shops wouldnt sell xforce systems if they were c@#p, not everyone has bucket loads of cash to spend on a KPM system. For the price tag, xforce does the job very well and sound good. What sounds good to you may sound not so good to others!!!

[SAMCRO]

Had a cammed ve with full 1 5/8 headers, cats and 2.5" CB. It sounded brutal and angry on the first and cold start up (loved it) It did drone at 1800-2000 rpm but you slam it lower gear and problem gone plus sounds much better there. As for sound I think it all personal preference. I was even looking at changing it over for KPM system at one stage but I couldn't justify spending soooooo much money on JUST an exhaust system. In my opinion xforce is a very good value for money. KPM sounds awesome, but xforce sounds very good with it's racey kinda sound. Haven't had a chance to listen to VCM, but seems to be better value again then KPM as it's a full $1000 cheaper.
If the little drone is all you have to put up with then be it coz you'll have $2000 left in your acc for a cam package :) Again just my opinion :)

I'll go xforce again when i get a new ss, unless I win a lottery... then kpm goes on :)

[debencha]

i suspect xforce changed there systems,a while back
theres a thread on here about 20 pages long wich went from xforces droning to them not droning as i am on a budget i bought 1 after sitting on the fence for quite a while.
if you have the cash buy a kpm or simular they look pretty and have good reports

[Plenty]

Bulls@#t, utter rubbish, I went for a cruise in a blown clubby with a full xforce twin 2.5'' system a week ago and sounds almost quiet.
in the cabin no drone, as for sound well maybe you shouldnt waste your money, tinny yea right, its statements like that make me laugh haha, get your facts right pal. Im sure performance shops wouldnt sell xforce systems if they were c@#p, not everyone has bucket loads of cash to spend on a KPM system. For the price tag, xforce does the job very well and sound good. What sounds good to you may sound not so good to others!!!

If you couldn't read the first time mate i said Drone in an AFM (active fuel management) car, something a Clubsport does not have!
Like you said everyones taste to sounding good is personal opinion, but i can tell you from personal experience and threads on here that KPM sounds far better than an Xforce and probably most other systems.
I also said IMO at WOT an xforce sounds tinny, as for performance shops not selling crap they generally cater to all budgets not just the big ones.

So how bout you get of the back foot defensive, wasn't having a dig at anyone or what they can afford.
I just wanted to give my opinion on what i and many others believe to be the best exhaust system for a VE and it's relative performance.

[smokey777]

its funny only tinny exhausts i ever hear are stainless ones :spew: as the reason why i only ever get mild steel systems

[private9]

Xforce also offer 2 different versions for the VE twin 2.5" (1 louder than the other) so it's possible people aren't comparing apples with apples.

[ADAM 26]

try taking out the kiss pipe on a x-force and replace it with a h-pipe. makes the sound
much deeper and slightly louder. stops drone, and doesnt hurt performance.

[701let]

Xforce also offer 2 different versions for the VE twin 2.5" (1 louder than the other) so it's possible people aren't comparing apples with apples.

I must have the old droney, disgraceful sounding and just all round shite version.. :)

[SIR_SKITZ]

Not to offend anyone that has bought the best they could afford but there are plenty of forum members that have gone from an Xforce to say a KPM, but not once have i heard of someone going the other way. :teach:

What? With the attitudes of some people in this place?
Who in their right mind would ever open themselves up to the put downs finger pointing and ridicule they'd cop for 1. Making the choice 2. Actually doing it!?


...

Back to the OP ... if you haven't already, for $590 off eBay, you can get a good sounding not overly loud great performing system from Xforce, it's not shiny, nor brag worthy to ur mates that it's the best Coz it cost you 5pints of blood and a lung, my 2.5 CB has been on now for a while, it has no drone in the car what so ever, has a nice deep burble at idle, for me it could do with being louder, my personal taste, wife drove over 1500kms with not one complaint of noise (she wants the damn car louder!!) but does exactly what it was designed to do, get rid of those damn gases from the engine, it's one and only reason for existing!
If I wasn't so damn far away, I'd have taken the SS to Greg and have them boys work their magic with a full custom system, but for the $$ I spent and many others also, you will be more than chuffed with the results

[ebbett21]

I always find it funny you say it gets mentioned "all" the time but i went to a dyno night & people were tellin me it was nicest sounding car there i also get alot of comments but it has all the so called wrong parts. 2.5" xforce catback pacey tri-ys & non descript after market cats. So i dont get your statment?

i agree, xforce on a cammed car in twin 2.5'' sounds awesome, they have a great roar, not overly loud

[dogsballs]

two things i've noticed recently that make a difference to exhaust sound in big pipes

1) cats, the 100cpi i think make the exhaust louder compared to 200cpi or stock cats
2) fuel. after running on E85 i swear my exhaust is louder due to less soot in the mufflers etc.

anyway, let the kpm, VCM and difillipo fanboi's preach that there bling bling systems are the best. :p

[Wiked VE]

mate i have a xforce 2.5 cat back in my car atm and i honestly havnt noticed any drone at all nor had any issues with it either structurally or from the boys in blue.
If u are just after a cat back i suggest hit up ebay as mentioned, if money is a issue theres a few second hand cat back systems on there for around the $500 mark as many buy the 2 1/2" find its too quite and they remove it for a 3" which is wat ill be doing.

[vsspack]

My VX has Tri-y pacies into pacy cats and twin 2.5 xforce catback with the x pipe cut out and a H pipe welded in. No drone at all, on idle its too quiet for my liking and only really Loud enough under WOT so ill be swapping to a twin 3 in the future. but its sure doesnt drone. anyway you should have no isses with epa with a twin 2.5 xforce as long as it has the rear can.

[dogsballs]

x-force systems definitely differ depending on what cats and headers you use. big bore 4-1's and 100 cell cats will be much louder.

[VYSHSV8]

two things i've noticed recently that make a difference to exhaust sound in big pipes

1) cats, the 100cpi i think make the exhaust louder compared to 200cpi or stock cats
2) fuel. after running on E85 i swear my exhaust is louder due to less soot in the mufflers etc.

anyway, let the kpm, VCM and difillipo fanboi's preach that there bling bling systems are the best. :p

I think you have that comment the wrong way around :):) as the so called soot actually makes it louder as it blocks the deflectors/ie where it deflects into glass packing or what ever each company uses, in mufflers and resonators making it closer to straight pipes, and yes I have a d'fillipo and also had a Xforce on the VX and both sounded great although the Xforce was a bit tinnier sound compared to the D'fillipo

[Plenty]

anyway, let the kpm, VCM and difillipo fanboi's preach that there bling bling systems are the best. :p

:confused: That's well..... cos they are! Look at the quality and then listen to them, there are no better exhausts for a VE. Period!

[dogsballs]

I think you have that comment the wrong way around :):) as the so called soot actually makes it louder as it blocks the deflectors/ie where it deflects into glass packing or what ever each company uses, in mufflers and resonators making it closer to straight pipes, and yes I have a d'fillipo and also had a Xforce on the VX and both sounded great although the Xforce was a bit tinnier sound compared to the D'fillipo

good point.

[grandpa spec]

I got a "Scotts Rods" catback which I 'think' is a Redback system in twin 2.5" with a rear resi.

Sounds awesome and roars once the rear resi has heated up and you hoof it. If you just putt around you are like any other sedan.

Still want extractors and some ballistic cats, just because I want a deeper note.

[SIR_SKITZ]

x-force systems definitely differ depending on what cats and headers you use. big bore 4-1's and 100 cell cats will be much louder.

Absolutely!
My SS is alot louder now with the stainless SUREFLO headers and 5in 100cell cats and yet, still has no drone.

[StoneX]

I know this is an X-force thread but I just read through about the KPM stuff... I got KPM 2.5" cat-back to begin with. It sounded great, everyone who heard it loved it but it did sound slightly droney between 1800 and 2000RPM. Then got PM 1 3/4" 4 into 1 headers, Ballistic 100cell cats and a tune... It sounded even better at idle, cruising, moderate throttle and WOT but the droning was a little worse as the system was louder overall.

Then I got a little baby cam fitted... At idle the exhaust had a fluttering noise which sounded like both mufflers were rattling, which I've since found out is an issue with KPM 2.5" system mufflers not liking certain air fluctuations from some camshafts. My tuner basically tuned the rough idle of the cam out so the fluttering was reduced but not gone. When cruising it sounds nice and deep, get quite a few looks as I drive past people even though it pretty quiet. At moderate throttle it sounds average, I can't describe it but a few friends have commented that it sounds not that good taking off. WOT roars and sounds amazing :D

But the drone is even worse now. At around 1950RPM seems to be the worst and that's about 95km/h, I think. Going up hills also sounds quite droney because the auto seems to like being in that 1800-2000 range.

I'm now looking for an exhaust that has the good traits of the KPM and not the dodgy incompatible mufflers! I haven't heard any other VE aftermrket exhausts to compare to.

Sorry for the long post :eek:

[scorpion]

I have a full 2.5 Xforce, 4 into 1 etc. I have fitted a centre resonator and also 2 hotdogs after the resonator and before the mufflers. I have NO drone and have had it tested at 88Db. The resonator and hotdogs didnt affect the dyno result much at all. Dropped about 2 rwkws and still make 296 at the treads. The car sounds great under load and is quite enough that I dont get looked at by the HWP.

[Solone]

I used to fit up exhausts and fitted many xforce systems. The problem with them is they have a glass packed muffler which burns through over time. They will get louder and drone over time.

Get a steel packed muffler for more predictable sound.

[smithenberry]

I have the 2.5 and its fairly loud with no drone at all and has never attracted a second look from the police.

[qwigybo]

old thread... but has anyone taken their centre muffler out of the 2.5" xforce and replaced it with straight pipe ?