I got answers from Toyota...
"We understand you wish to replace the factory speakers with aftermarket speakers, however, and we apologize as, other than Toyota Racing Development (TRD), we do not recommend or assist with modifying our vehicles from the original factory specifications.
Toyota's warranty covers repairs and adjustments needed to correct defects in materials or workmanship of any part supplied by Toyota. Modifications to your vehicle could affect the performance, safety or durability, and may violate government regulations. Non-Toyota parts, or any damage or failures resulting from their use, are not covered by any Toyota warranty."
