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Collector pipe mod


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I have read through the collector pipe mod and as a welder i might consider doing it in the future. Although i still cannot determine whether this mod is worth it or really does make a difference because there are no dyno results. Also, does it provide extra low end torque power or top end? Below is the photo of the collector pipe where it squishes up as it joins together.

733AB0F7-5A4C-4EC1-8F64-1833B343C744.png

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Similar to yourself I have previously reviewed a number of threads on this Forum about this Y pipe modification. I understand that the torque curve mores more towards the top end.  This does not suit my driving style and conditions where I prefer more torque in the lower rev band.

I made particular note of 1 post where the member did this modification then changed it back to factory standard.

End result is that I upgraded the rear catalytic convertor to a high flow one. Not going to give it a personal recommendation but something to consider as an alternative.

As a welder, you should be able to easily change this rear catalytic convertor and change back, if required.

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2 hours ago, campbeam said:

Similar to yourself I have previously reviewed a number of threads on this Forum about this Y pipe modification. I understand that the torque curve mores more towards the top end.  This does not suit my driving style and conditions where I prefer more torque in the lower rev band.

I made particular note of 1 post where the member did this modification then changed it back to factory standard.

End result is that I upgraded the rear catalytic convertor to a high flow one. Not going to give it a personal recommendation but something to consider as an alternative.

As a welder, you should be able to easily change this rear catalytic convertor and change back, if required.

Appreciate the feedback!

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Claims seem to be anything from "no change" to "huge difference". I honestly couldn't notice a difference, unfortunately. Was expecting something - a placebo if anything. 

Though, if you can do it yourself, it's probably worth a try/to experiment. 

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16 hours ago, donnot said:

Claims seem to be anything from "no change" to "huge difference". I honestly couldn't notice a difference, unfortunately. Was expecting something - a placebo if anything. 

Though, if you can do it yourself, it's probably worth a try/to experiment. 

The only way to find out is through a dyno run unfortunately. I’ll have to find another way to add power while keeping it n/a.

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7 hours ago, Jay1 said:

The only way to find out is through a dyno run unfortunately. I’ll have to find another way to add power while keeping it n/a.

There are a few dyno sheets available if you search for the 2GR (V6) Camry in the US and the Y-pipe modification that show slight power gains. I spent many hours trying to find mods for more power, but there isn't much outside of a couple % here or there max (without going down the expensive SC route). 

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