JDM & USDM Exhaust Manifold Comparison

[Legacy777]

Not sure if I posted these, but here are some comparison pics of the JDM exhaust manifold and the stock USDM turbo legacy manifold.

http://main.experiencetherave.com/subar ... stmanifold

You can definitely see that the JDM manifold keeps the individual cylinders separated for much longer. Not sure if that change the exhaust note/sound. The crossover pipe is pretty much the same as the USDM crossover pipe.

Once I get the EGT bung weleded on the up-pipe I'm going to send everything off to get coated by Swaintech. I'll post some pictures when everything gets back.

[Aerotech]

Here's the stock SS mani vs the RS-RA mani;



Looks like the same setup you have.

[Legacy777]

I got these exhaust manifolds on yesterday and started the car up. It sounded slightly different from what I remember. But that could just be in my mind. Almost sounded a little more raspier. I spent some time trying to find an exhaust leak, and couldn't find anything.

[Legacy777]

There is something different in the sound. I can't put my finger on it, but it does sound different than it did before....

[Aerotech]

I had the same reaction when I fired mine up... rest of the exhaust was the same, but the car just sounded meaner, especially at full throttle.

I put most of it down to the heads and the 2.5L block... I guess the headers do make a difference.

[Legacy777]

Yeah, the headers are the only difference. The crossover & up-pipe are the same. The runners are separated for a little while longer, but that's it.

Glad I'm not the only one that had the same reaction.