I don’t think your email going to find a lot of people hating on Mahle rings, they make a good product. Pretty much any name brand ring will work well if used for the proper application with good end gaps.
We’ve had good luck even with the lower end brand enginetech for more oem type applications.
Sealed power, Mahle, wiseco, all make good rings.
347, 205 11R's, Box R Intake, Ported lower, custom comp cam, 42lb injectors, 255LPH, pro-m 80, 75mm Cheap-ass TB, 1 3/4 x 3in LT's, exhaust by me, A5 trans, 4.10
422WHP/456Ft/lb. Tuned using QH by Tony @ Tuners Inc.