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Downpipes attach to the turbos, replacing pre-cats here in the US. Our pre-cats then lead to the cat pipe. If you're running the same as Japan, you'd have the small quarter pipe attaching between the turbo and the cat pipe. The x pipe (or h-pipe) is where the two sides come together to balance out the flow. Then the muffler pipes attach to that. So basically: header > turbo > downpipe (replaces pre-cat) > test pipe (replaces cat pipe) > X pipe > muffler pipes. 

Petz #2 "What's the point of having the car if you don't drive it?" - Mrs. Guapo 08/20/05Jeeeesus Christ - my Dad (after a ride in my Z) 12/26/04 People have the right to freedom of expression. However, people also have the right to point and laugh- aliaZ 04/06/06 |
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