Bpi Flow Stack install
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Honda-Tech Member

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From: Nyack/Stony Brook, NY, United States
Will i be able to put my Bpi Flowstack on my Injen CAI on my 4th gen prelude. It is 2.5 inchs??? I have read its 3 inches is it possible to use on my intake setup? If it is, will it give me the same performance gains?
You'll need a reducing coupler to fit the 3" flowstack on your 2.5" intake piping.
Something like this should work.
http://www.extremepsi.com/stor...age=1
As far as performance gains, I'm not sure. Reducing the size of the piping after the stack will probably affect airflow and I'm sure won't be as effective as if you used 3" piping. 3" the whole way would be optimal.
You could always give it a try, but I know you can find cheap intake piping on ebay that's 3" for not too much more than the price of that coupler I posted.
Something like this should work.
http://www.extremepsi.com/stor...age=1
As far as performance gains, I'm not sure. Reducing the size of the piping after the stack will probably affect airflow and I'm sure won't be as effective as if you used 3" piping. 3" the whole way would be optimal.
You could always give it a try, but I know you can find cheap intake piping on ebay that's 3" for not too much more than the price of that coupler I posted.
Thread Starter
Honda-Tech Member

Joined: Mar 2007
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From: Nyack/Stony Brook, NY, United States
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did you really just pad 6 posts in the course an hour and a half on 2 seperate days?
no wonder you have 250 posts in a month and a half.......wtf, give people some time to answer
next time wait a little bit for an answer before you up your post count
also think about what you are asking and maybe you could answer it yourself
would you run a header with a 3" collector into a 2.5" exhaust? NO, of course not......so why do this?
no wonder you have 250 posts in a month and a half.......wtf, give people some time to answer
next time wait a little bit for an answer before you up your post count
also think about what you are asking and maybe you could answer it yourself
would you run a header with a 3" collector into a 2.5" exhaust? NO, of course not......so why do this?
Thread Starter
Honda-Tech Member

Joined: Mar 2007
Posts: 1,453
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From: Nyack/Stony Brook, NY, United States
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Silver Surfer »</TD></TR><TR><TD CLASS="quote">did you really just pad 6 posts in the course an hour and a half on 2 seperate days?
no wonder you have 250 posts in a month and a half.......wtf, give people some time to answer
next time wait a little bit for an answer before you up your post count
also think about what you are asking and maybe you could answer it yourself
would you run a header with a 3" collector into a 2.5" exhaust? NO, of course not......so why do this?</TD></TR></TABLE>
okay thanks for not answering my question, anyone else?
heres a
and i would give you a biscuit if i had any
no wonder you have 250 posts in a month and a half.......wtf, give people some time to answer
next time wait a little bit for an answer before you up your post count
also think about what you are asking and maybe you could answer it yourself
would you run a header with a 3" collector into a 2.5" exhaust? NO, of course not......so why do this?</TD></TR></TABLE>
okay thanks for not answering my question, anyone else?
heres a
and i would give you a biscuit if i had any
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LukieLuc »</TD></TR><TR><TD CLASS="quote">
okay thanks for not answering my question, anyone else?
heres a
and i would give you a biscuit if i had any</TD></TR></TABLE>
Your question has been answered. Get a 3" intake to go along with the flowstack and you're golden. Now move along.
okay thanks for not answering my question, anyone else?
heres a
and i would give you a biscuit if i had any</TD></TR></TABLE>Your question has been answered. Get a 3" intake to go along with the flowstack and you're golden. Now move along.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LukieLuc »</TD></TR><TR><TD CLASS="quote">
okay thanks for not answering my question, anyone else?
heres a
and i would give you a biscuit if i had any</TD></TR></TABLE>
Wow...reading > you
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Silver Surfer »</TD></TR><TR><TD CLASS="quote">
would you run a header with a 3" collector into a 2.5" exhaust? NO, of course not......so why do this?</TD></TR></TABLE>
Anyways, just spend $20 bucks on ebay and get the 3" piping.
okay thanks for not answering my question, anyone else?
heres a
and i would give you a biscuit if i had any</TD></TR></TABLE>Wow...reading > you
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Silver Surfer »</TD></TR><TR><TD CLASS="quote">
would you run a header with a 3" collector into a 2.5" exhaust? NO, of course not......so why do this?</TD></TR></TABLE>
Anyways, just spend $20 bucks on ebay and get the 3" piping.
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