ZEX Comp Cams Valve Locks - 04 Yukon XL 6.0L LQ4 - ZEX623-16 **CLEARANCE** Porsche 911 997.2 and K24A2 engines dramatically increase

and K24A2 engines dramatically increase both horsepower and torque yet retain complete valvetrain stability and exceptional engine response

RECOMMENDATIONS- MOTUL 300V POWER series are suitable for some engine applications and are particularly recommended for qualifying

Choice of Spring from 3psi to 26psi (Optional)

Most aftermarket radiators including K-Tuned Passenger Radiator

NS1-XTR4 kit features an Xtreme pressure plate for the most demanding driver

ZEX Comp Cams Valve Locks - 04 Yukon XL 6.0L LQ4 - ZEX623-16 **CLEARANCE** Porsche 911 997.2 and K24A2 engines dramatically increaseNOTE: THIS IS CLEARANCE ITEM. ALL SALES FINAL.