2015+ STI SD KIT Style:(Kit A) Speed Density and higher ethanol blends

and higher ethanol blends

Billet 5/16 Quick Connect Adapter Fitting

Visconti Flex Fuel Sub Harness (UPGRADE ONLY)

Required to reach ASTM conformance certification

2015+ STI SD KIT Style:(Kit A) Speed Density and higher ethanol blendsSpeed 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 sensor from you pre intercooler location to a post intercooler location. This kit allows you to move the intake air temperature sensor