This is the official XC40 spoiler extension. Roughly $400 and maybe two extra inches : r/Volvo
Auto Spoiler per Bagagliaio Posteriore per Volvo XC40 2018+, ABS Spoiler Posteriori Alettone, Auto Spoiler Sul Tetto Posteriore Kit Labbra,C/Carbon Fiber : Amazon.it: Auto e Moto
ABS Spoiler sul Tetto Nero Lucido Accessori per Volvo XC40 2018 2019 2020 : Amazon.it: Auto e Moto
Add-on Universal Fit For Volvo XC40 R-Design 2019-2022 Front Bumper Lip Spoiler | eBay
SPOILER LED Posteriore Per Volvo XC40 | Striscia LED, Alettone Adesivo NERO
Per Volvo XC40 2019 2020 Spoiler ABS plastica Hatchback tetto ala posteriore Kit accessori - AliExpress
Spoiler nero posteriore al tetto VOLVO XC 40 - Accessori Auto In vendita a Padova
Spoiler nero posteriore al tetto VOLVO XC 40 - Accessori Auto In vendita a Padova
EXPY Spoiler Posteriore Auto per Volvo XC40 XC60 XC90 C30 C70 V40 V60 V90,Modificato Spoiler Ad Ala Fissa Posteriore Spoiler per Hatchback Coda Decorazione,A/Carbonfiberlook : Amazon.it: Auto e Moto
Fit For Volvo XC40 19-24 Rear Window Roof Spoiler Modified Wing ABS Glossy Black | eBay
ABS Spoiler sul Tetto Nero Lucido Accessori per Volvo XC40 2018 2019 2020 : Amazon.it: Auto e Moto