It seems like the more power a car comes packing from the factory, the more it makes owners want to come up with ways to make even more. The 350HP Focus RS is no different, and luckily we here at Stage 3 have compiled a solid selection of intakes and tuners from the most reputable manufacturers in the business so that you can take your RS to the track in confidence and peace of mind. Also check out our selection of RS Suspension Upgrades to shave off even more time from your track record.
