Interesting thread, I had the Heffner tune and pulley with the accufab x pipe before I went Whipple with the soon to be installed stainless headers and cats. But,... my tune was for Kalifornia Kool-aid 91 octaine. Taking dyno differences into consideration, Chris is pulling about 20 rwhp with the 93 octaine tune, huge difference.
But, as I often write, I have observed huge difference between one dyno and another. Only the before and afters on the same car within hours really matter to me...
Needless to say, I have been impressed with HEFFNER's products and service.