Can they do a performance tune on a 2006 Honda Accord? And how much gains will I get on hq and torque? And also how much would it cost?

They charge $127 an hour for their top notch work . They mainly do Porsche and other euro cars . But they did my 2013 f150 so it shouldn't be an issue. As far as gains , that's up to your tuner and whatever other mods you might have already.

Sorry we do not tune Hondas. Thank you for asking though.

Unless you're running an aftermarket ECU tuning wont really be available. Additionally without some heavy modifications even an ECU upgrade will only net you minimal gains. Look into LHT Performance. They specialize in Hondas and have been around for 20+ years.