I was reading Spugen's website and I figured out that their system are NOT fully stainless steel.
On my previous car I tried both aluminum and SS exhaust system and it seems like ss definitly lasts alot longer.

Anyone have put much mileage with Spugen exhaust? how are they holding up?

Price and performance seems to be very good deal but I really dont want to buy another exhaust system after 30-40k miles. I wont be driving my S2000 in snow but I will be driving occationnaly when road is dry in winter. Yeah I live where I get much snow(upstate NY).

So should I spend more $$ for full ss exhaust?

 

Its true about any exhaust that is not full SS. You always have the chance of the elements and time before a steal exhaust falls apart. Even some Japanese non SS exhausts tend to crack at the welds.
We do offer the full SS Fujitsubo exhaust similar to a comptech but for a fraction of the price and similar gains in HP and torque!