On both 2.5L and 3.0L with Sho-Shop Y-Pipe and Cat, Stock SVT piping, no Res, aftermarket mufflers. Havent had any rasp.

Silver 98 SVT Contour E0 #4121 Reborn with 3L 6/03 Dyno: Max Horse Power= 194.1 Max Torque= 184.8 http://www.geocities.com/speeddemons19 Also at www.cardomain.com/memberpage/561067