the leg shaker 500 compared to a non leg shaker is that the 8in mid-bass woofers in the doors are on the 500. if you want a hair more bass go the the audio options/dsp/ and choose rear. they tend have more bass at that setting.the shelby/kicker sub for the mustangs might be the plug and play answer for more thump/the highs is a personal choice. the door subs are probably best left alone. note i do not know if the sheby/kicker upgrade setup is compatible with the 2010/2011 mustangs.
2007 mustang gt premo/alloy grey on dove int/hurst shift/gt500 pedals/
sequental tail lights/2008 ceter concel with lite ring/mustang lit door sills/frpp push start/20x8.5/20x10 blackcrome bullit motorsports/
cdc chin spoiler/saleen H.I.D. headlights/steeda udp/oem nav/
factory side scoops/gt500 rear bumper/saleen 12in. sub/frpp bullitt cai/frpp bullitt strut bar/frpp x pipe/magnaflow cat backs/
oem nav/and more 2 come [but are we ever realy done?]