Cobb Tuning Subaru Coolant Overflow Tank STI 2015-2021, WRX 2015-2021 - 800660 AN to Inverted Flare Adapter Thread: 3/8" NPT

Thread: 3/8" NPT

Black Phosphate Coated 304 Stainless Steel Hardware

FOR LEFT HAND DRIVE (US SPEC) + K20Z1 & K20Z3 TRANSMISSION

DOES NOT FIT K24Z3 or K24Z7 Valve cover

you are able to spool your turbo quicker and maintain tight control of boost levels throughout your power curve

Cobb Tuning Subaru Coolant Overflow Tank STI 2015-2021, WRX 2015-2021 - 800660 AN to Inverted Flare Adapter Thread: 3/8" NPTEMISSIONS This part is not an emissions related part and therefore can be used on Emission Controlled Vehicles. DESCRIPTION The OEM Coolant Overflow Tank for the 2015+ WRX STI does its job well enough but the cheap plastic material is ugly and will potentially crack over time, especially when driving hard and going through extreme heat cycles. Its shape is also clumsy and obtrusive when adding an aftermarket FMIC. The upgraded COBB Subaru Coolant