..I put a technigas pipe on my 04 s9...wound up having to try the 7 gram rollers..
..i was running the oem 8.5 with oem pipe, and loving them!..
..currently running 6gram ninja sliders, and this afternoon imma put in some 5.5 sliders...
..rpms are 8000 with the 6g, but will drop out of powerband uphill..think the 5.5s will do very nicely..
..i'm learning about tuning to a pipe...my first time...