GSC Power-Division Beehive Valve Spring Kit for FA20 WRX-BRZ-FRS Breather Plumbing and Fittings Optional pressure relief valve porting

Optional pressure relief valve porting

8L AT 2WD LS Sedan 1993

V3 Closed Deck Process

The result is a reduction in stress points

One of the first things to note about the OE exhaust manifold are the several points where flow is decreased due to a neckdown in piping diameter

GSC Power-Division Beehive Valve Spring Kit for FA20 WRX-BRZ-FRS Breather Plumbing and Fittings Optional pressure relief valve portingMax RPM: 9,500 RPM Max boost: 35 psi Beehive Spring Coil Bind 0. 800 Install Height 1. 308 1. 315 Seat Pressure 89 87 lbs Open Pressure @ 11mm lift 231 lbs @ 0. 875" 229 lbs @ 0. 882" Maximum Valve Lift 0. 448 Includes: 16 Dual Springs 16 Spring Seat Locators 16 Titanium Retainers Beehive Spring Benefits: Rev faster Lighter components More durable design Less stress on valve train components Lower spring frequency for more precise valve control More