Yo, Regarding the pioneer speakers. Yes.. much difference. They sound a lot better. Actually any aftermarket speakers are better then the stocks... No spacers needed. you just have to make new holes on the stock bracket.

Kentstuh, i was reading the forum about replacing stock speakers and i noticed that you replaced yours with Pioneer TSD1602R speakers? Hows the sound difference? I got a Pioneer Avh-X8500bhs and i want to pair it with the TSD1602R speakers...did you use any spacer? btw, no amp just HU and speaker. Thanks!