For Mild Performance use. Manton Series 1 pushrods are made from 4130/4135 chromoly tubing that is much stronger than a stock pushrod. Provides approximately 140,000 psi tensile strength. Not recommended for use with hardened guide plates or roller camshafts. Mainly used in small engines from go carts to Volkswagens with low valve spring pressures and up to 250 hp.
