Yes, finally got them on last spring. Ran them into a Magnaflow Tru-X pipe, to OEM resonator, then Magnaflow SRT6 muffler purchased from Rob. Love the enhanced sound; and no drone. No Dyno info. sorry; I'd probably be disappointed anyway. It sure feels like 20whp though, lol. I'll be running the road course a couple of times this summer at Sonoma, and will get a video and sound clip to post here.