Those were the 1st ones I looked at but once they ship to the UK and you add import duty and VAT they get expensive. As HJS are a German company I thought I must be able to get them from within Europe but the Giulia isn't listed on their website. I contacted them directly but they said Fabspeed make the fitting and use the HJS cat within it so Fabspeed is the only place to get them from.I’m also tempted by these cats from HJS.
Shop Fabspeeds Alfa Romeo Giulia Quadrifoglio Primary Sport Catalytic Converter Downpipes. Eliminate the heavy and restrictive factory catalytic converters with high flowing stainless steel sport catalytic converter downpipes for maximum power and an exhilarating sound.www.fabspeed.com