COMP Cams Locks Eb Mach'D Steel 11/32in 648-100 FR SPORT Hard panel construction engineered for

Hard panel construction engineered for truck suspension movement and daily use

Drop-in fit designed to restore factory air conditioning function

Aluminum body - Dissipates heat better than plastic

Wall thickness is not specified in the product data

This header consolidates four runners into one outlet

COMP Cams Locks Eb Mach'D Steel 11/32in 648-100 FR SPORT Hard panel construction engineered forCOMP Cams Valve Locks 648 100 Most people believe that the tang inside a valve lock holds the retainer and valve spring in place while the engine is running, but this isn't the case. The cross section of material in the tang is not strong enough to withstand open spring loads of 1000 lbs. or more. The sole purpose of the tang is to temporarily locate the lock, retainer and spring relative to the valve until the taper of the retainer can nest around