GSC 4B11 Evo X Beehive Valve Spring Kit (5042) USAshippingONLY The STM boost leak tester

The STM boost leak tester is the best tool to help find and repair these leaks

JDM Evo 4/5/6 Factory Replacement Fit

Pressure Drop: 0 PSI

Cooler Construction: Stacked-plate

block off's and vacuum hose for a clean install

GSC 4B11 Evo X Beehive Valve Spring Kit (5042) USAshippingONLY The STM boost leak testerGSC Power Division Beehive Spring Kit with Titanium Retainers for the Evo X includes a full set of 16 titanium retainers and 16 beehive valve springs. Vehicle Fitment: Mitsubishi 4B11T 2008 2015 Evolution X IN: 75 lbs @ 1. 350" EX: 72 lbs @ 1. 361" install height IN: 217 lbs @ 0. 917" EX: 214 lbs @ 0. 928" Up to 12. 2mm lift cams Includes: (16) Beehive Valve Springs (16) Titanium Retainers More Info: The GSC beehive spring is made with an ovate wire