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Discussion Starter · #1 ·
I had my heart set on a Hirsch Step 1 upgrade, but could not find them for the US model. So I am looking for advice from this esteemed group on upgrading the ECU on a US spec 2003 9-3 SS Linear (w/ 175hp).
What manufacturer has products for US spec 9-3s? Any of them Saab certified w/o impacting warranty? thanks
 
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