Hdc4

Grab an HDC3-18 with whatever coil, don't matter. Cut the bastid open as soon as you get it and rebuild it with the dual 0.5 coil 3518 recone kit you bought on the same day. That sum-bich'll actually do something impressive.....give you that car audio industry elusive "bandwidth" thingamabopper.

 
Grab an HDC3-18 with whatever coil, don't matter. Cut the bastid open as soon as you get it and rebuild it with the dual 0.5 coil 3518 recone kit you bought on the same day. That sum-bich'll actually do something impressive.....give you that car audio industry elusive "bandwidth" thingamabopper.
Must haz DD motor to get DD reconez.

 
Wow, had no idea. Why not ask the 40 people on here that have found a way to BS the system how they did it. There are 50,000 pictures of a 3500 whatever. Grab one and send it over. Do they pull the "gotta have picture ID, today's date and mother's maiden name" BS like on these types of sites? Or order one from a local dealer.

 
think you have to have a serial# off the motor

the motors are different...when the hdc's first came out there was a huge thread on here about them

just because they're made in the same country doesn't make them the same

 
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