Rocker Arms for Gen 3/4 60V6

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Rocker Arms for Gen 3/4 60V6

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Product Information

When the first Gen 3 engines came out in late 1993, they were still using the hardened pushrods, pushrod guideplates, and a ball fulcrum.  They did get an upgrade to 1.6:1, which is useful for anyone with a gen 2 looking for a quick and easy upgrade.  Starting in 1996, the GM 60V6s saw an upgraded roller rocker arm, also at a ratio of 1.6:1  The aftermarket options for the Gen 1 Iron head have been the only other options made available, from the roller tipped Comp rockers to the Crane Gold Race.  The roller tip rocker has its advantages in reduced flex and better materials than stamped rockers, as well as a more accurate and consitent ratio.   The Gold Race are a full roller setup, but require modification to 4 rockers to clear the 3100 and 3400 large port lower intake.  The 3500, with its raised intake port and rocker arm location has created a bigger headache with more clearance issues.  Both rocker options also require pushrod guideplates be used, and hardened pushrods.  The 3100 and 3400 have an option from the gen 2 and early gen 3 engines.  The 3500 needs to have these modified to clear the intake port. 

In an attempt to source an option, the Gen 4 engines with VVT use a design similar to the LS1 rocker arms, but with pedestals.  These pedetals are shorter than the 3100/3400/3500 style, preventing them bolting up.  Using the 8mm Gen 3 pedestal with the Gen 4 rocker has been mentioned from time to time on various forums since the Gen 4 was released.  While at first glance it appears to be a fit, it turns out this is not the case. 

This is the stock 3400 Rocker Geometry

This is the Hybrid Gen 3/4 Rocker

Close, but not worth the extra valve guide wear.

Product Code ArticleRockerArms
Manufacturer WOT-Tech
Condition New

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