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HP4-HDG6 kit features ACT's most popular Heavy Duty pressure plate
Fabricated from the same urethane used in our model specific Subaru
Hand Crafted and Tig Welded to Perfection for Strength and Durability
This is the ultimate intake upgrade for the Audi RS4 and RS5 (B9)
Injen 06-08 Mazda 6 3.0L V6 Polished Cold Air Intake (SP6072P) 1630 HP4-HDG6 kit features ACT's mostIs your engine choking for air and in need of some additional horsepower? If so, Injen has exciting news for you! The SP series of cold air intakes from Injen Technology will allow your engine to breathe deeper and enhance the performance that you've been craving. The SP series of cold air intakes is Injen's flagship system in their lines of traditional aluminum cold air intake systems. Injen Technology is the world's first tuned air intake system and