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Old 05-28-2004, 09:03 PM   #5
Scooby Specialist
Member#: 60740
Join Date: Apr 2004
Chapter/Region: South East
Location: Durham, NC
2004 Impreza WRX


Awesome info as always, FAQ Massa

From the UP FAQ:

What uppipe metal material is best? Uppipes are made from mild steel, stainless steel (304 & 321), and cast iron. There is no irrefutable evidence that one material is better than the other.
Now cast iron is positively the best? Is this just a theory or has it been well tested and proved? If it's the later then maybe we should update the UP FAQ. Same goes for the DP.
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