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Old 16-02-2015, 07:57 PM   #31
mcfly94
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Default Re: 2001 AUII XR8 exhaust discussion

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Originally Posted by Peuty View Post
Erm, I assume you are talking to me. Everyone that has heard my car comments on how great it sounds. With no balance pipe. So thanks for saying my car only makes noise pollution, that's big of you.

I'll try to rustle up a sound byte.
i have the same, twin 2.5 and no balance, no x, no resonator, just two straight through mufflers not glass packs, theres a certain rev range atm where it barks something cronik, not the nicest sounding, but i think thats because its a huge exhaust on stock headers cats and motor.
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Old 16-02-2015, 08:15 PM   #32
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Default Re: 2001 AUII XR8 exhaust discussion

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Originally Posted by STINKY NINJA
A single 3 inch would probably flow better than the stock exhaust with its super restrictive mufflers anyhow,not that im saying to get it because ground clearance may be an issue.
Ideally get a custom 2.25 twin with an x pipe 2 mufflers(centre) and 2 hotdogs(rear) i used to have a custom twin 2.5 with an x pipe and only 1 magnaflow muffler per side and it was a bit sluggy down low and sounded pooey and droned,was on a stock 220kw,was just too big for a stock windsor imo.
Ill say this though,it was the nicest symmetrical looking,shiny exhaust ive ever had on any of my cars,glad i never paid for it lol.

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Soundwise it evens up the note between the 2 separate pipes and sounds alot better than a twin sytem with no balance pipe or x pipe,performance wise im not sure,i also had another 220kw xr8 with a twin system with no balance or x pipe and it was the worst sounding exhaust ive ever heard,almost like an old 253 thong slapper,very bad sound...

This dude is on the money.
2.25" is the ducks guts for the 5L, and they absolutely need a balance pipe.
2.5" would work well from the headers and in the mid section, but the tailpiece must be 2.25".
Making the pipe smaller as the gas travels encourages flow.
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Old 16-02-2015, 08:23 PM   #33
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Default Re: 2001 AUII XR8 exhaust discussion

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This dude is on the money.
2.25" is the ducks guts for the 5L, and they absolutely need a balance pipe.
2.5" would work well from the headers and in the mid section, but the tailpiece must be 2.25".
Making the pipe smaller as the gas travels encourages flow.
keep in mind you guys are talking about stock 5l's being the 185 to the 220kw yes? even a 220kw with a mild cam would be best with the 2.25
but alloy head and aftermarket intake, cam, surely begins 2.5 territory
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Old 16-02-2015, 08:31 PM   #34
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Default Re: 2001 AUII XR8 exhaust discussion

listen very well in what Sox says or he will give you a lecture on about exhaust systems on how they work and what's the best system for different applications

i was waiting for you sox to reply in this thread
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Old 16-02-2015, 08:42 PM   #35
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Default Re: 2001 AUII XR8 exhaust discussion

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keep in mind you guys are talking about stock 5l's being the 185 to the 220kw yes? even a 220kw with a mild cam would be best with the 2.25
but alloy head and aftermarket intake, cam, surely begins 2.5 territory
Yeh, fair enough on a 185.

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Originally Posted by AU2GHIA
listen very well in what Sox says or he will give you a lecture on about exhaust systems on how they work and what's the best system for different applications

i was waiting for you sox to reply in this thread

It's painful watching so many people fit an exhaust which is too big, using the mentality that because a race car has it, so should my road car...
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Old 16-02-2015, 08:53 PM   #36
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Default Re: 2001 AUII XR8 exhaust discussion

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Originally Posted by Peuty View Post
Erm, I assume you are talking to me. Everyone that has heard my car comments on how great it sounds. With no balance pipe. So thanks for saying my car only makes noise pollution, that's big of you.

I'll try to rustle up a sound byte.
Well you assumed wrong matey,if i quote you then im aiming it at you,if not then its a general statement.
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Old 16-02-2015, 09:14 PM   #37
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Default Re: 2001 AUII XR8 exhaust discussion

while we are on the subject, what exhaust did the 220kw come with std??
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Old 16-02-2015, 09:21 PM   #38
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Default Re: 2001 AUII XR8 exhaust discussion

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while we are on the subject, what exhaust did the 220kw come with std??
Dual 2.25" to the center mufflers, then dual 2" tail piece.
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Old 16-02-2015, 09:27 PM   #39
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Default Re: 2001 AUII XR8 exhaust discussion

If ford would have used decent straight through mufflers it would have flowed quite good.
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Old 16-02-2015, 09:29 PM   #40
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Default Re: 2001 AUII XR8 exhaust discussion

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If ford would have used decent straight through mufflers it would have flowed quite good.
I did this to mine just recently as a cheap interim until I make a complete new system.
It made quite a decent improvement overall.
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Old 16-02-2015, 09:31 PM   #41
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Default Re: 2001 AUII XR8 exhaust discussion

thanks sox..

im currently running hurricane headers, 2.5" 100 cel cats, 2.5" merge into a single 3" with xforce muffler and a generic hot dog at the rear, its a 220kw with std bottom end and trickflow 170 heads..
I have been considering going to a duel system, its just the matter of 2.25 or 2.5 and wether or not to run a H pipe or x pipe cross over...
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Old 16-02-2015, 09:53 PM   #42
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Default Re: 2001 AUII XR8 exhaust discussion

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thanks sox..

im currently running hurricane headers, 2.5" 100 cel cats, 2.5" merge into a single 3" with xforce muffler and a generic hot dog at the rear, its a 220kw with std bottom end and trickflow 170 heads..
I have been considering going to a duel system, its just the matter of 2.25 or 2.5 and wether or not to run a H pipe or x pipe cross over...
As already mentioned a dual 2.25" is ideal for a road going 5L.
My 5.6L Windsor has dual 2.5" to the middle and dual 2.25" tail piece.
The method of balance pipe isn't really important, so long as it has one.
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Old 16-02-2015, 09:54 PM   #43
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Default Re: 2001 AUII XR8 exhaust discussion

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Originally Posted by Sox View Post
This dude is on the money.
2.25" is the ducks guts for the 5L, and they absolutely need a balance pipe.
2.5" would work well from the headers and in the mid section, but the tailpiece must be 2.25".
Making the pipe smaller as the gas travels encourages flow.

http://www.fordforums.com.au/attachm...7&d=1423959668


What about 2.5 crush bend rear section
as you can see its reduced the diameter of the pipe /??

would this be ok?? with an added xpipe
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Old 16-02-2015, 09:58 PM   #44
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Default Re: 2001 AUII XR8 exhaust discussion

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What about 2.5 crush bend rear section
as you can see its reduced the diameter of the pipe /??

would this be ok?? with an added xpipe
The bigger pipe will still have lower velocity, so not really.
It's all about keeping exhaust velocity high in the most used RPM range.
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Old 16-02-2015, 10:00 PM   #45
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Default Re: 2001 AUII XR8 exhaust discussion

Not an AU but a 5l nonetheless, my EL runs a twin 2.25" with no merge pipe, metal cats, a straight through muffler then 2 resonators at the back. Happy with it.
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Old 16-02-2015, 10:24 PM   #46
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Default Re: 2001 AUII XR8 exhaust discussion

Problem with 2.25 is that it then becomes custom? What off the shelf system is there in that size?
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Old 16-02-2015, 10:43 PM   #47
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Default Re: 2001 AUII XR8 exhaust discussion

Thats the only issue with it,can become pricy to get a custom mandrel bent twin system done,i think thats the only reason most go with twin 2.5 off the shelf.
I only just got a new exhaust for my eb,only off the shelf options were 2.5 or 3 inch single or twin 2.5 with no x pipe,i would have loved a twin 2.25,i know its not a 220 xr8 but my motor pretty much has 220 heads,cam,manifold(not t/b)sounds almost identical.
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Old 17-02-2015, 06:26 AM   #48
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Default Re: 2001 AUII XR8 exhaust discussion

you would be looking at over a 1000$$ to have a custom 2.25 twin with 2 x mufflers and xpipe

2.5 twin with 2 x mufflers easily accessible at a wrecker 2nd hand for 200$$ and probably about 120$$ to 200$$ to install
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Old 17-02-2015, 07:18 AM   #49
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Default Re: 2001 AUII XR8 exhaust discussion

But without going to pick a part what is the cost of a 2.25 cat back?

I saw Manta had a 2.5 dual for about $950. Ill have to measure mine.
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Old 17-02-2015, 08:06 AM   #50
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Default Re: 2001 AUII XR8 exhaust discussion

Polyal I was just quoted $1200 for a 2.25 mandrel exhaust by one of the best in western sydney.
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Old 17-02-2015, 08:13 AM   #51
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Default Re: 2001 AUII XR8 exhaust discussion

i had a couple of AU XR8's,
3in single 2 mufflers, sounded crap
duel 2.25 with chambered mufflers no balance pipe, great note but quiet
put on 2 hotdogs, loud and flappy
put on a balance pipe, loud and less flappy but too loud really
put on 2 redback straight throught mufflers, nice note but think these without a balance pipe would be great
and last one was a 220kw with 3in single and sounded flat and boring

so all in all if i did it again i'd use a duel 2.5, 1in balance pipe, and a single oval resinator each side placed at the back if they fit
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Old 17-02-2015, 11:27 AM   #52
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Default Re: 2001 AUII XR8 exhaust discussion

Just buy the Manta twin 2.5' system, you won't be dissapointed.
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Old 17-02-2015, 11:30 AM   #53
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Default Re: 2001 AUII XR8 exhaust discussion

Does anyone have any clips of the Manta setup?

Mines pretty loud and droney at the moment, no idea what brand it is though. I was after something a bit more refined.
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Old 17-02-2015, 12:04 PM   #54
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Default Re: 2001 AUII XR8 exhaust discussion

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Does anyone have any clips of the Manta setup?

Mines pretty loud and droney at the moment, no idea what brand it is though. I was after something a bit more refined.
My understanding is it isn't very quiet, but the only guy I know running it is FTW-302. I think he might have some clips, perhaps drop him a PM?
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Old 17-02-2015, 09:33 PM   #55
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Default Re: 2001 AUII XR8 exhaust discussion

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you would be looking at over a 1000$$ to have a custom 2.25 twin with 2 x mufflers and xpipe

2.5 twin with 2 x mufflers easily accessible at a wrecker 2nd hand for 200$$ and probably about 120$$ to 200$$ to install
Mine was $600 for a dual 2.25, 2 resi's and 2 chrome tips, but I supplied the 2 Hooker aerochambers (which are too quiet). All up it would have cost pretty much bang on $1000 I think.

Picked up 9rwkw with it though so it made excellent gains for nothing but a catback over the previous single 2.5.
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Old 17-02-2015, 10:55 PM   #56
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Default Re: 2001 AUII XR8 exhaust discussion

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you would be looking at over a 1000$$ to have a custom 2.25 twin with 2 x mufflers and xpipe

2.5 twin with 2 x mufflers easily accessible at a wrecker 2nd hand for 200$$ and probably about 120$$ to 200$$ to install
Comparing a brand new system to a second hand system is really an apples/oranges thing.

You might find a new system to be a bit less than that too, perhaps as low as $800.

And, I wouldn't have thought a good 2.5" dual exhaust system is common from a wrecker.
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Old 18-02-2015, 12:58 AM   #57
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Default Re: 2001 AUII XR8 exhaust discussion

manta use combinations of mufflers, resonators, hotdogs and straight pipes in the middle section and tail pipes, so many different combinations can be made
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Old 18-02-2015, 06:58 PM   #58
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Default Re: 2001 AUII XR8 exhaust discussion

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Problem with 2.25 is that it then becomes custom? What off the shelf system is there in that size?
Nothing as far as I know. I guess its one of those things, you can either have one made exactly how you want it for a price, or grab an off the shelf job and take the pros and cons as they come.

FWIW I had a Difillippo system on my last XR8 and it was good, but it was a single 3" also.
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Old 20-02-2015, 06:12 PM   #59
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Default Re: 2001 AUII XR8 exhaust discussion

Ok i stuffed up

I bought the falcon Dual Exhaust and it don't fit my fairlane
we cut the pipes ready to extend the front section and weld in an XPIPE but the rear section didn't fit and it was sitting heaps low
It was build for a sedan and this would of cost around the $1000 mark

anyone else want it?? it practically brand new
i left it at the exhaust shop

owes me $220

Purchase me
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Old 20-02-2015, 06:26 PM   #60
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Default Re: 2001 AUII XR8 exhaust discussion

I would if you were in nsw...
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