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2.5 inch hfc into 3 inch exhaust?

I was thinking of getting the AAM COMPETITION R-LINE 3" Exhaust but was wondering how it would bolt it onto a 2.5 inch hfc, or if i would need a

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Old 01-10-2020, 05:43 AM   #1 (permalink)
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Default 2.5 inch hfc into 3 inch exhaust?

I was thinking of getting the AAM COMPETITION R-LINE 3" Exhaust but was wondering how it would bolt it onto a 2.5 inch hfc, or if i would need a 3 inch hfc, Thanks.
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Old 01-10-2020, 06:25 AM   #2 (permalink)
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Originally Posted by ironfistmonke View Post
I was thinking of getting the AAM COMPETITION R-LINE 3" Exhaust but was wondering how it would bolt it onto a 2.5 inch hfc, or if i would need a 3 inch hfc, Thanks.
Excellect choice the AAM Competition R-Line 3” exhaust is a very nice quality exhaust with spot on fitment to match and there is power to be gained here. This exhaust bolts right up to the stock Nissan OEM 2.25” cats but if you are spending the coin for this exhaust you don’t want to create a bottleneck and leave power on the table so if you don’t have a 2.5” test pipes or 2.5” HFC’s it would be recommended to get the AAM Competition 2.5” test pipes or AAM Competition 2.5” HFC’s to match up with this exhaust.
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Old 01-10-2020, 07:00 AM   #3 (permalink)
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thank you for the information, very helpful.
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Old 01-10-2020, 09:27 AM   #4 (permalink)
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Don't support AAM

Do a little research and you will see why ...
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Old 01-27-2023, 01:34 PM   #5 (permalink)
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I have been running/tracking the AAM dual 3" catback for 3 years now. Best flow you can find on the market. This is especially good if you want to upgrade to supercharge later on.
The exhaust has very good build quality, no fitment issue. However, it does have drone around 2000~2500 rpm but not a problem if it's a track car.
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