NR Racing Roller Tip Rocker Arms for GX270, GX390, and 13/15 Clone OHV - Pair Choice of 1.2 or 1.3 Ratio
Machined from chrome-moly steel
Hardened roller tips and shafts
Dyno-tested to 10,000rpm and proven to increase horsepower
Uses stock shaft and pivot nut
Fits under stock valve cover
*Note: Dual springs may cause excessive shaft stretching or breakage. These rocker arms require shorter pushrods (typically 5.62 for GX270 and 6.44 for GX390).
