Does the JDM version, direct from Mugen, have any differences from King Motorsport's version of the exhaust. Is it longer, bigger diameter etc????

Thanks

 

Anything different? Anyone???

 

the only difference is the length of the b-pipes..both have same diamter inlets of 2.25..

 

So I should get the one from King, right? Another question, why would the header be 2.5" and then you would bottle neck it to 2.25" at the cat. I don't see how opening it up from the block to the cat increases performance if you end up closing it back down to 2.25". Can someone explain?

 

i guess that's mugen fer ya!! i have their header(usdm) and their exhaust, make sure that it says jasma on it and that's the jdm one. im pretty sure, overall im very happy!!!!yeah mugen

 

im not sure why they do that..even the spoon has it..prolly to bolt up to their existing cat with out any modification

 

Here are some dimensions...
https://honda-tech.com/zerothread?id=62417


Will
-who would hate to cut a new system in order to remove the bottle neck.