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Ships within 48 hours · Estimated delivery Sep 12 - Sep 17
Does not come provided with shims
A quick and easy power gain on the insufficient FB20 engine
This improves engine efficiency
Short means less header volume and quick spool up
Dyno-proven maximum gains of up to 9 whp and 8 wtq and peak gains of up to 4 whp and 3 wtq using 93 octane fuel while maintaining safe AFRs on the stock tune (2015 WRX w/ CVT)
Brian Crower Valve Springs and Retainer Kit Nissan 350z / Infiniti G35 VQ35DE vendor_CTEK Does not come provided withPart #: BC0220 Designed for high rpm, BC valve springs are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. BC titanium retainers are CNC machined from 6AL4V round bar titanium to exacting tolerances. Specs: Spring Pressure Seat: 1. 440" @ 100 lbs Open: 0. 990" @ 236 lbs Coil Bind: 0. 815" (no machine work required)