which pipe leaks the least

[jbltz450]

what is the best pipe to buy, that doesn't leak or spit oil everywhere?

[SilverLake250R]

My Curtis Sparks by far had the best fitment of any pipe, and did not leak at all at the exhaust flange, but a little bit at the connection. My FMF leaked bad at the exhaust flange, and my ESR needed to be sealed really good at the connection between the head pipe and expansion chamber because it leaked real bad there.