(a) How does the regular JDM and USDM's compare? Any different markings?

(b)What affect does entirely removing the middle butterfly section have? (ghetto euro-r) by adding an inch of washers or by cutting studs, anyone ever do this? I have a modified JDM manifold sitting in front of me right now, just wondering what if its a good or bad thing.


Modified by porkchop at 9:57 PM 3/29/2004

 

anybody? I searched with no luck to find differences betwen USDM and JDM manifodls, I guess there is none.

This is supposed to be a JDM with mid-section removed (note washers ), it could almost be passed of as a euro-r in terms of function, but what do you guys think, and btw the nmbers stamped are P13 HF-1 (sorry for crappy picture, I don't have photoshop on my laptop yet, not used to any other program)


OOOPs wait just read in this thread https://honda-tech.com/zerothread?id=119116 that allowing butterflies to stay open will lose power, i guess the same applies to not having them at all then So how does the euro-r mani avoid this problem?