I too will be running a P3 .27 with a JP2 Pipe, I was waiting for the New Collari .28 but i guess i will keep that one as a backup, once it comes out. I have had nothing but good luck with Picco engines, i have had a P2 .21 and .26 that i have raced in my revo, as well as a P3 .26 that lives in an MGT. All have held a tune exeptionally well and i have had at lease 4 to 5 galloons through each before even thinking about a Piston and sleve. So bang for the buck you cant go wrong with a Picco