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2005 Pontiac Gto

We'll be using COMP's 7638-16 hardened pushrod kit ($130). These 7.4-inch, 5/16 Magnum pushrods will strengthen this typically weak link in the LS2's valvetrain, as the stockers are non-hardened. Once all 16 are in, the rocker arm assemblies go back on. A base spec of 22 ft-lbs is called for; however, at that rating Speed Inc. has seen them loosen up. Although you have to be very careful going tighter as you could pull threads, you may want to snug just a bit tighter than that (I suggest asking a pro before attempting this).
2005 Pontiac GTO - LS2 Heads/Cam Swap

 We'll be using COMP's 7638-16 hardened pushrod kit ($130). These 7.4-inch, 5/16 Magnum pushrods will strengthen this typically weak link in the LS2's valvetrain, as the stockers are non-hardened. Once all 16 are in, the rocker arm assemblies go back on. A base spec of 22 ft-lbs is called for; however, at that rating Speed Inc. has seen them loosen up. Although you have to be very careful going tighter as you could pull threads, you may want to snug just a bit tighter than that (I suggest asking a pro before attempting this).  View Related Article

 

 

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