These rockers are designed for Naturally aspirated applications and only work on the stock cam(for boosted applications, see 1.9 modified rockers).  Stock valvetrain is fine to 6000 rpm.

They start out as a set of stock rocker arms. The seats have been welded in and remachined at a new location. There are thousands of this style of rocker arm in the 3800 market, all with excellent results. They are the most tested and proven rocker solution in our market.

For more information on ER rocker arms click here.

These work with all stock or aftermarket pushrods, lifters, springs, retainers. They will not work with aftermarket cams. Aftermarket springs are recommended for shift points over 6000.

Kit includes 12 rocker arms and 2 modified pedistals. If you need new valve cover gaskets or rocker bolts, please order separately.