I've got a jp2 pipe on an os v-spec and wanna try out a jp3 pipe. The jp3 pipe really woke up the bottom end of my Nova rossi 421b. How will the jp3 effect the V-spec? Where will it move the power curve? And which way should i re-tune my engine? Richer maybe? Any suggestions would be appreciated.
Hi rai13
I havent used a JP2 on a Vspec only a JP3. JP3 worked very well, excellent bottom and top. You always have to retune when using a different pipe in order to get the best response. I cannot tell you richer or leaner it depends on where you are and what fuel you using.
Bottom line the JP3 works.
