Rear Diffuser - Acura TLX A-SPEC/BASE 2021-2023*If you choose to add the rear sparts with your diffuser, we need to know if you have or not the underbody spoiler kit. The shape of the rear spats will be different according to your application. This piece is made to fit under the factory rear valence (Base or A Spec) and will align and bolt with 2 holes under the rear bumper. You will only have to drill one additional small hole each sides in order to mount it properly (they wont be visible if you
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