Brian Crower Valve Springs and Retainer Kit Nissan 350z / Infiniti G35 VQ35DE Vehicle Model_RX-8 Part #: 640901

Part #: 640901

RaceComp Engineering Yellow spring rates are an aggressive 365 lbs/in front and 360 lbs/in rear that match the new OEM valving on the 2015 STI

-Street and track torture tested

Rear: 15/16in(24mm) Hollow (bar weight 5

Part #: F1514P

Brian Crower Valve Springs and Retainer Kit Nissan 350z / Infiniti G35 VQ35DE Vehicle Model_RX-8 Part #: 640901Part #: 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)