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Speed Density is a must for those with high powered Subaru's or anyone that wants to use a vent to atmosphere blow off valve. When calibrated properly there is no sacrifice in drive ability, your car will drive just like stock. But to properly calculate SD Based fueling you'll need to move the air intake temperature se

Save on 2015+ STI SD KIT with a Visconti Tuning promo code

Checkmate is a savings app with over one million users that have saved $$$ on brands like Visconti Tuning.

The Checkmate extension automatically applies Visconti Tuning discount codes, Visconti Tuning coupons and more to give you discounts on products like 2015+ STI SD KIT.