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steddie · 11-29-2023, 11:19 PM

I did put an factory sourced undertray under the engine a couple years ago but nothing at the back underneath as there is not much to change under there with the airflow I think but please tell me that I am wrong.

11-29-2023, 11:19 PM	#40 (permalink)
steddie EcoModding Lurker Join Date: Sep 2014 Location: New Zealand for the last 40 years Posts: 62 Smart - '04 Smart Forfour Passion Smart - '04 Smart Forfour Passion Thanks: 0 Thanked 7 Times in 7 Posts	Nearly 50mpg I did put an factory sourced undertray under the engine a couple years ago but nothing at the back underneath as there is not much to change under there with the airflow I think but please tell me that I am wrong.