Unfortunately, I had tried and returned a few set of reducers, as the correct sizes don't seem to exist, so I gave up and went with stock. The measurements are 75mm to 45mm, I had tried 2 sets of Vibrant Performance adapters from Summit Racing, 2.75", which we able to stretch slightly and fit over the heat exchanger, but the smaller side only came in 1.5" or 2", needed 1.75"....so I ordered a set of HRE 2.75" to 1.75", which theoretically would have been a near perfect fit, but they were much stiffer and the 2.75" would not fit over the heat exchanger. My stock boots are in fine shape, and are actually slightly thicker than the "racing" adapters, so I gave up after that long battle. The hoses themselves worked out pretty good using the aftermarket silicone, seemed to fit well.
bummer, it would've been nice to have a silicone hose option for the boots but thanks for trying it out for us and letting us know your findings
