The Kelford Cams KVS109-3S valve spring upgrade is recommended for 3S-GTE engines running 262ø cams and producing around 400hp. These cams work well for those who drive their car daily and want good drivability. With an OEM or upgraded turbo sizing between 48-54mm, there is a significant increase in mid-range power, particularly when used on turbo applications.
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\nThis increase in power is especially noticeable for E85 applications.