damm everyone but 1 is low balling the **** outta this set up
a 4.2L built with an m112 at 10-12psi is easily about 400+rwhp
20psi did 500+ i believe maybe it was 24psi
really you dont need the split port upper intake
just heads and lower intake
a 4.2L built with an m112 at 10-12psi is easily about 400+rwhp
20psi did 500+ i believe maybe it was 24psi
really you dont need the split port upper intake
just heads and lower intake