with those mods youre looking at 304 at the wheels max. the car is 300 at the crank stock. not the wheels. the combination of intake tune and exhaust is only adding 30-40 hp to the crank MAX. if you want more go with a stage 2 or better cam
you know as soon as i saw that you posted dave i knew that it would be to bust my balls about springs LOL. im going to s&k speed in rockville centre tommorow to purchase a set