FONIX

Hey im a proud owner of an ra 28 but im not to happy with the stock power i get from the stock 4cil..and i cant putt a turbo or charge it due to the p plate restrictions i need it to b an every day car i was thinking about puttng a cressida 3l in line 6 in but if i was goin 2 do so whould it b werth it and how much would it cost ruffly...and would it b possebl??? thanks for ur time take care