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Exhaust replacment 

 

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 Post subject: Exhaust replacment
Posted: Sun Nov 20, 2011 11:03 am 
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Age: 68

Posts: 1

Joined: 20th Nov 2011

Ride: X.R.6 50th Anaversary

Location: Perth
WA, Australia

Hi guys has any one replaced there stock 2 inch Exhaust on an X.R.6 F.G to a 2.5 inch system and if so did improve the low down torque or make the performance go backwards.
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 Post subject: Re: Exhaust replacment
Posted: Sun Nov 20, 2011 11:54 am 
Stock as a Rock
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Age: 24

Posts: 189

Joined: 12th Mar 2011

Gallery: 2 images

Ride: AUI XL Falcon

Location: sydney
NSW, Australia

havn't done it but it could only improve performance along with fuel economy.

 

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 Post subject: Re: Exhaust replacment
Posted: Sun Nov 20, 2011 12:26 pm 
Getting Side Ways
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Age: 33

Posts: 1322

Joined: 21st Dec 2004

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Ride: EF GLi/Ghia bitsa

Location: Melbourne
VIC, Australia

You will see a benifet from it for sure, if it's a turbo it will require a flash tune though.

Gab
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 Post subject: Re: Exhaust replacment
Posted: Mon Nov 21, 2011 4:00 pm 
Getting Side Ways
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Age: 37

Posts: 1273

Joined: 30th Sep 2007

Ride: g6e 2009

Location: hiding in the bushes
WA, Australia

i changed my g6e exhaust. went from the single 2 inch to a dual 2.5, with hi flow cat and extractors. works well, seems to have alot more go once you get it moving. still just as sluggish to get it off the line as it was originally, unless you have the revs up in the first place. im thinking thats more first gears fault than anything. fuel economy is good, i drive in the suburbs mainly, so abit of stop start, but its not uncommon for me to pull around 600+ km from a tank. as a side note, if you change the exhaust on a bf2 onwards (bf2/fg1/fg2) you will need a tune to cancel out the check engine light. since bf2 there is now 2 o2 sensors, and changing the exhaust sizing results in different readings to these sensors making them think your fuel mix is too lean orrich and changes accordingly. a tune will tell the car to ignore the 2nd o2 sensor.
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 Post subject: Re: Exhaust replacment
Posted: Mon Nov 21, 2011 6:50 pm 
Stock as a Rock
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Age: 28

Posts: 196

Joined: 13th Sep 2011

Ride: EB falcon

Location: Boyne Island
QLD, Australia

when i had my f xr6 i went to a 2.5 single muffler system but also kept the standard exhaust tip on it, i noticed that me acceleration was a hell of alot more responsive, torque was a little better but more noticeable in the wet (very hard to take off without spinning) and my fuel ecomeny was better by .3ltrs per 100km around town and hiway runs was .5ltr per 100km better. mine was a manual though, it went even better when i changed over to a cold air intake.
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