GSC Subaru EJ Series Chrome Polished Exhaust Valve - 33mm Head (+1mm) - SET of 8 Outback XT / Wilderness 4 Temperature Inputs (Configurable pull-ups

4 Temperature Inputs (Configurable pull-ups on ANT1&2)

but that wouldn't give the best performance

HD-M/Perf Street Sprung

5i or JDM long runner (TGV less) manifold but can't run aftermarket top feed fuel rails made for short runner manifolds

Ported head with +1mm valves

GSC Subaru EJ Series Chrome Polished Exhaust Valve - 33mm Head (+1mm) - SET of 8 Outback XT / Wilderness 4 Temperature Inputs (Configurable pull-upsStem Diameter (mm) 6. 0mm Overall Length (mm) 104. 25mm Head Diameter (mm) 33mm When creating our new valve line we set out to create the best performance, longest lasting valves available to the aftermarket. Using advanced 3D design and simulation software, we have created a stronger and higher flowing valve head design. We flow test prototype valve heads in the specific applications to make sure we have the highest flowing valve head available on