Subaru STI Valve Springs & Guides

Take your STI to the next level with VividRacing's high performance engine components like pistons, rods & bearings, as well as Cold Air Intake, Suspension like Springs, Rods and Coilovers, to wheels, tires and anything else you could use to tune your STI to the next level. For high performance upgrades for your STI, VividRacing has you covered-- we're the #1 source on the web for STI racing parts and upgrades, and our drive to be number one in customer service and delivery keeps our customers returning to us year after year. Even if you don't find what you're looking for, be sure to call us and speak with a STI upgrade & racing specialist-- odds are we can help you locate the exact part you want.

View all STI Valve Springs & Guides products

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	JUN Valve Springs Subaru STI JDM III/IV EJ20 (inner shim) 08-14 Model Number: 1009M-F001 View Price JUN Valve Springs Subaru STI JDM III/IV EJ20 (inner shim)When valve speed increases by high rotation-ization of engine, Jamping may occur by the factory valve springs. Moreover, since inherent pitch is low, Surging may occur in a high rotation region. In JUN, the valve spring with which the load optimal at the time of a set and a valve lift is acquired was manufactured. Even when the amount of valve lifts increases by using a high cam, since the adhesion margin is secured enough, the JUN valve s...
	JUN Valve Springs Subaru STI JDM V-VII EJ207 GC8 08-14 Model Number: 1009M-F002 View Price JUN Valve Springs Subaru STI JDM V-VII EJ207 GC8 When valve speed increases by high rotation-ization of engine, Jamping may occur by the factory valve springs. Moreover, since inherent pitch is low, Surging may occur in a high rotation region. In JUN, the valve spring with which the load optimal at the time of a set and a valve lift is acquired was manufactured. Even when the amount of valve lifts increases by using a high cam, since the adhesion margin is secured enough, the JUN valve springs d...