Different vehicle manufacturers have different ideas about where and how to attach factory audio. The result is that speaker mounting is rarely universal with each model having a specific set of woofers will fit and that set only. To allow these speakers to be upgraded to a higher quality speaker we have speaker adaptors, plastic of wooden rings that are designed to fit a specific vehicle, leaving a universal flat mounting surface ready to accept some replacements woofers.
To get an idea of what speaker adaptors are available for your car we would recommend using our reg lookup or vehicle product finder, it is the easiest way to identify the right product for you.
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