Different types of "X" pipes

[Niz55]

Any one know what are the difference between HARD X and SIAMESE X?

which one offers better flow? I noticed that borla/frpp use SIAMESE and other companies like shiftech use HARD X.

Thank you

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[IPOGT]

A hard X is two separate pipes that remain separate in the X until the very center where they cross, A Siamese as the name would imply, the X shares the space with the other pipe as it goes through the X. In other words, each individual side of the X is pressed together as though the edges were opened and connected like the one I have on my FP touring system.

 

[Niz55]

So which one performs the best?

 

[Nagare]

All depends on the exact firing order of the car I'm sure, difference is most likely negligible...especially if you're talking about your GT350. Something I read earlier seemed to suggest the Siamese was better though.

 

[Niz55]

Borla one that came with the atak is really rally crap quality compare to the shiftek. The borla only has a little hole in the middle while the shiftek pipes cross each other.

 

[wildcatgoal]

Siamese. Hard H-pipe and Siamese X-pipe... that's what I've always known to be the way to go.

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