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Discussion Starter · #1 ·
What's the exhaust outside diameter for a Non-R V70? Looking to order some stainless steel exhaust pipe for a resonator delete. I was thinking it was 2.25" OD. But, it's dark and raining out, so I can't go out and measure.
 

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I believe 2.5”


Sent from my iPhone using Tapatalk
 

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So what / how much advantage is this, I see mention of them being removed, to me "usually" Resonators don't have baffles that would have additional back pressure or flow restriction BUT sounds like not the case here? In looking at some exhaust for the XC70 it looks like there are two behind the CAT, are you cutting out both and are you adding back a bung for an O2 sensor that I think I saw on a system. Also wet and rainy here, not a good day to inspect what I have on the car.

Thank You
 

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On my 2002 Volvo S80 2,4l non turbo it is 60mm. I know it might bot be helpful at all since other car but mentioning it anyways. I will probably remove the center resonator on mine too. Wonder if it has any effect on the sound?
 

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Discussion Starter · #5 ·
So what / how much advantage is this, I see mention of them being removed, to me "usually" Resonators don't have baffles that would have additional back pressure or flow restriction BUT sounds like not the case here? In looking at some exhaust for the XC70 it looks like there are two behind the CAT, are you cutting out both and are you adding back a bung for an O2 sensor that I think I saw on a system. Also wet and rainy here, not a good day to inspect what I have on the car.

Thank You
No performance benefit. Just slight improvement in sound without pricey exhaust systems.
 

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Discussion Starter · #6 ·
I believe 2.5”


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Well, most of the exhaust looks like 2.5". However, on either side of the resonator it's closer to 2.35" to 2.4".
 

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No performance benefit. Just slight improvement in sound without pricey exhaust systems.
Thank You, mine is very quiet, I will assume still stock, will take a look. I will keep looking at threads for freer breathing performance increases without going too overboard.

Regards
 

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Discussion Starter · #8 ·
Thank You, mine is very quiet, I will assume still stock, will take a look. I will keep looking at threads for freer breathing performance increases without going too overboard.

Regards
If you want to improve exhaust flow, start with a new downpipe.
 

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