i had a gt40 tubular with a ported lower. aside from being the best looking intake i have ever seen, it was plenty to see 295whp n/a. i have since sold the car, but the guy that has it now is making 397whp on the same combo i had and an s-trim making a very conservative amount of boost. my point is, unless yuo are building something ridiculous, the gt40 will be more than adequate.