SAR-490 (400-425-455)


Fits all 400-425-455 engines using RT-685 hydraulic roller tappets. 9.900″ x 5/16 heavy duty pushrods. All-steel roller tip adjustable rocker arm system. Requires no machine work and will fit under most stock valve covers with oil baffles. Kit includes: screw-in studs, 5/16″ guide plates, 5/16″ heavy-duty chrome moly pushrods, 1.6:1 steel roller tip rocker arms, 3/8″ rocker balls and poly lock adjusting nuts. Allows tappet adjustment for mechanical lifters and correct preload for hydraulic lifters. NOTE: Most valve jobs are done incorrectly so an adjustable valve train is essential for maximum performance. Maximum spring pressure is 330 lbs open & maximum lift is .550″. Oil restricted pushrods can be substituted for an additional $129.00 (all ‘A’ heads must be drilled to 7/16″ to accept our SAR rocker kits).

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Additional information

Weight11 lbs
Dimensions20 × 6 × 3 in