Here is drag ported pistons & drag ported 4mil cub by HJR racing. I ran this set up on gas and alky over the past 4 years, well last year was only one trip! anyways, on gas with 20cc domes, +4 timing, shearer inframes, 35 pwks it made 88hp. on alky I ran this setup with 17cc domes, +10 timing, ported pistons, shearer oof's, 40 mm lectrons, lightenend fly wheel and it did 106hp. it ran good and i had no issues, but i'm looking for something a little tamer and i will sell the jug, pistons & rings and stud extenders for $725.00 shipped.. these cases were bought new sometime ago and I have the receipt if needed, that's why there is no vin# stamped on them. these will come with all the bolts ,nuts, shifter seal ,clutch arm seal and billet neutral switch cover for $220.00 shipped for these and text me (702-501-8770) with any questions, thanx jeff..