I had the Techtinics SS exhaust installed about 7 months ago. It sounds great. No sounds yet, but there is a "resonance" sound around a certain RPM. I occurs around 2800-2950 RPM. Oh well. ROB -98 GLX blklbk - TechTonics SS, AVO Coil-overs, Autotec rear/front stabs and upper/rear tie- bars