I personally like the R-55 think it looks the best. Something about those short pipes like the m4 and the r-55 really look good IMO. As far as performance and sound go I could not tell you. Look on you tube and just pick your favorite.
A forum community dedicated to Suzuki GSXR owners and enthusiasts. Come join the discussion about superbike performance, racing, modifications, engine builds, troubleshooting, maintenance, and more!