Just from what you listed (not what's in your sig), that combo should add about 35 HP with a good 93 octane tune. I'd say 300 RWHP..... Add some Steeda pullies to free up another 8-10 hp.
Pretty sure he's referring to CMCV delete plates.290 to 295rwhp, although it is unclear what "intake delete plates" are??????l
Also depends a lot on what the car is making BHP-wise. If you got one of the dogs with 235 rwhp stock, 270 might be a real stretch. Good thing is most of these cars see to average around 260-265 stock.i think it depends on your tuner. The better the tuner the better the numbers