If you have a stock exhaust definitely get that done the stock ford cat restricts a lot of flow, get a a high flow cat with ya exhaust and a retune and u should b lookin around those numbers with the mods ya already got and if ya want to run higher boost get ya valve springs done I run my xr on 10 psi day in day out and it's safe!!!!! Plazaman heavy duty valve springs are good that's what I run in mine!!!!!! Hope this helps