EMPI 1.25:1 Ratio Forged Rocker Arms — VW 1200–1600cc, Set of 8 (21-2312-0)1. 25 Ratio Forged Rocker Arms Part Number: 21 2312 0 Forged for strength and durability, these ratio rocker arms provide an easy and inexpensive way to get more power and acceleration from any 1200 1600cc engine. No special modifications are needed, the 1. 25's work with stock rocker shafts, push rods and adjusters or with our hi performance shafts and swivel foot adjusters. The 1. 25 Rocker Arms will not affect cam duration, bottom end performance