Supplied by Andy from R35 Audio. Hertz Front Door Speaker Kit with Hertz Mille Pro 3 Way Component Speakers Hertz Centre Channel Kit Hertz Rear Coaxial Speakers with Mounts & Flyleads Power Wire Kit Hertz Mille Pro Power 4 Amplifier Upgrade (2 x 150w + 1 x 500w RMS) Kicker L7 Solobaric 8″...

I tried searching everywhere for correct door speaker adapters and could never even find the GTR listed on most adapter manufactures. I made some of my own with MDF however due to how wet the insides of the GTR doors get then I thought realistically how long would they last. So just by trial...