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This listing is for the modification service of a Sydney Composites Universal Diffuser to suit NSW Sports Sedans class rules. Our Universal diffusers are sold and installed separately: 


Sydney Composites are happy to offer a modification service to customers who have purchased our diffusers whether it be in any of the below configurations:

  • Standard
  • Large
  • Large with rebate


Please note, this price is to modify our universal diffuser loose/unfitted to a vehicle. Shortly after purchasing this product, you will be contacted to arrange a booking. The diffuser must be dropped off at our Wetherill Park workshop for all required modifications after a booking date is agreed.


Conditions apply, please contact us for any questions.

Sydney Composites Universal Diffuser modification service - NSW Sports Sedans

GST Included
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