I'm happy with my Epco pipes. You will have to change your jets with Epcos for sure though, it will barely run without the jets included with the pipes.
Thunderbike pipes are very good, but they are more expensive.
Specialty Spares are well woth the price, but they are chroned steel so they will need a bit more care.
Staintune pipes are very good, but they are rather expensive.

Let's hope there's intelligent life somewhere in space 'cause it's buggar all down here. -- Monte Python