MR2 Rear Speaker Adapter To fit 4" Speaker
grabcad
These brackets will let a 4" Speaker fit on the rear of the MR2 replacing the original speaker and bracket. Possibly you could fit a bigger speaker but being so close to the passenger ear it wouldnt sound to well. I fitted some JBL Stage 2 424 easy. I printed them in PLA and press fit some nuts. That said you should print them in something more durable like ASA The LH and RH brackets are just mirrors. The bracket and JBL speaker are 100g lighter per side that the original.
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