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06-02-2023, 09:50 PM
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#1 |
 Drives: Slowcart Join Date: Dec 2022
Location: KY
Posts: 21
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Brian Crower Valve Spring Question
Hi all I'm in the process of building my Yaris currently. Currently I am going all motor. I have done the following: AEM CAI, Weapon R Header, Tooter Intake Runner Extender, 2AZ throttle body, port matched intake manifold, 1ZZ injectors, and FTG Tuning Reflashed ECU with higher redline.
My question is with the increased rpms and (hopefully) more horsepower should I consider upgrading to Brian Crower Titanium Valve Springs and Retainers or will stock springs be ok? I'm planning on doing autocross and track days with it so dependability is super important. |
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