some will say no but personnaly it helps a bit but its all a choice a place to put your money is for the big 3 witch helps even more than a cap

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Big box installer (Timmins)
02 GRAND CARAVAN SPORT

SPEAKERS: -TX series all around and soon to replace
-2x Massive audio CW12 in 4.2cf dual chamber square ported at ~35hz BLOWN crap damn those low notes lol

Amps: -DD SS1
-KAC-745

Upgrades: -160 amp alt. (soon)
-4 gauge wiring (done)
-0 gauge BIG 3 (done)
-sound deadning (soon)
?????????