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2.5" downpipe to full 2.5" ISR exhaust?

Old 02-23-2018, 06:25 PM
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Default 2.5" downpipe to full 2.5" ISR exhaust?

Looking to boost soon with a T25 turbo. I'm thinking of getting a custom 2.5" downpipe made to connect to a 2.5" ISR exhaust. Has anyone done this before? I'd rather go 3" stainless but that is out of the budget right now so full 2.5" it is.
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Old 02-23-2018, 06:27 PM
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nope. no one has done this before. You are a pioneer
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Old 02-23-2018, 06:59 PM
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go with 2" piping

higher velocity
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Old 02-24-2018, 07:35 PM
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Originally Posted by ProjectDaily View Post
Looking to boost soon with a T25 turbo. I'm thinking of getting a custom 2.5" downpipe made to connect to a 2.5" ISR exhaust. Has anyone done this before? I'd rather go 3" stainless but that is out of the budget right now so full 2.5" it is.
I pieced together my own turbo kit for my VVT engine on my NB and I had the ISR exhaust at the time. I had a custom made 2.5 stainless down pipe made to mate to the ISR exhaust and it sounded very good! I did later end up upgrading to a 3 exhaust after the down pipe.
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Old 02-24-2018, 09:53 PM
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What do you expect the response to be? You already started a useless thread about exhausts. Who cares if someone has done it before, if you are too cheap to do it right, go ahead and get a custom 2.5" downpipe made and report your results.
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