Just get the Stock head kit. Then run either, Fiveo, Pro Circuit, Two Bros, Kitaco pipes...Heaps of others work. But they are the ones i have ridden with. I run a Pro Circuit T4 on my Stock head 88. And its perfect....Runs really well. Five0 and pro circuit have the same header pipe, just a different Muffler. So its pretty much same **** different sound. Both are a good exhaust...