just bought a T1R b-pipe and my car is a 98 EK4 SiR with a factory b16a..
will the b-pipe mate to the cat? also, i bought a header with a 2.5" collector.. will it mate to the other end of the cat?

 

 

^ yay or nay?

 

stock cat size is 2 1/4" I believe. You can get an adapter or a cat from an ITR

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by supertran25 &raquo;</TD></TR><TR><TD CLASS="quote"> stock cat size is 2 1/4" I believe. You can get an adapter or a cat from an ITR
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stock cat size is actually a little less than 2 1/4

 

so what should i do? i cannot afford a new cat.. is there like an adapter or something?
will this decrease the flow since the cat is 2. whatever inches?