Factory Pipes . . .
 

Anyone know for sure what my pipes are made of (2001 4x4 screw 5.4l)? On one thread, I read the factory uses stainless steel. On another I read aluminized steel.

I am going to have this truck for a LONG TIME...so if the factory pipes are SS, I will leave them alone. If not, I will look to get the highly recommended magnaflow kit.