BTW, do you mean truck, or trunk? IMO four tens would be a waste. If you were to get a couple 12s or even 15s you could dip lower into the frequency range and move more ait more efficiently. Also 15s make people say ooooh more often
1996 Contour "Mean Green" (99-02) 2002 Malibu Blue Focus ZX5 - something to hold the PB 15...