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more Blow Off Valves
Effectively holds unlimited boost
which shortens engine response time and improves throttle feel -- the engine revs more quickly and falls faster between gear changes
How Differential Movement Affects Traction
Radium Fuel Rails Top Feed Upgrade - Subaru Models (inc. 2002-2014 Subaru WRX / 2007+ Subaru STI) PDM_aero more Blow Off ValvesThe Top Feed Fuel Rail Upgrade w Top Ports will allow you to upgrade to a larger variety of top feed fuel injectors for the Subaru WRX STI. RallySport Direct carries highly engineered products designed to improve the performance and longevity of your vehicle brought to you by Radium Engineering. This is the Radium Engineering Top Feed Fuel Rail Upgrade w Top Port. This kit will allow you to upgrade to a larger variety of fuel injector sizes while