I see on the regular GT350 that there is a smaller pipe inserted in the X pipe. Then it re-inserts in the resonator. Did you keep this neck down feature when you replaced the resonator with pipe? I wonder what the R looks like down there. Does it's straight pipe come off of that smaller pipe necking down from the X pipe? Or does the piping stay the same diameter from the X pipe back? For that to happen, it seems you would have had to get a new X pipe with a slightly larger diameter to accomplish a sturdy slip and weld. They are blaming the 7 hp dynometer difference ( R having more) between the regular and the R on the lighter wheels. But could it be that Ford has contrived a restriction after the X pipe on the GT350 to give the R the edge? I would sure like to see what the R looks like down there before I do a resonator delete.Do it! In normal mode the car sounds the exact same. In sport mode stomp on the gas and it is a good 15 or 20 percent louder. The R's come without the resonators so basically removing them on the standard GT350 makes your car sound just like an R. I had mine done the first week I owned it and have zero regrets. On the contrary, I love it.
Thanks Nick. Same neck down. I'll keep things the same but with pipes instead of resonators. I will be guaranteed the R sound and drone control level (assuming the mufflers are the same) and and no less flow (assuming the mufflers are the same).This is the underside of a GT350R that was displayed at Laguna Seca last August