[Jack21]

For a Stage V, you may not need Car Chemistry inserts. Using a 2 1/2" x 4" x 30" glasspack from Page Muffler, Jones Exhaust, J.C. Whitney, or your local Meinikie shop; they're right in the Stage V category.

Lenthening the case from 30" to 36" dramatically improves sound control without inhibiting backpressure and engine torque curve.