New 4-7 Swap FXR Series Flat Tappet Cams fit 1955-1998 262-400 cid small block chevys with stock .842 in lifters.

2bbl or 390cfm 4bbl for larger engines, 3/8-1/2 mile fast tracks. Good heads. For restricted classes. Camshaft profiles are designed to have more area under the curve and have a fast opening rate while remaining valve train friendly. Higher rocker ratio may be used 1.6 ratio = .600 in gross lift

• RPM Range 3800-7200
• Advertised Duration 298 / 292 deg int/exh
• Duration @ .050 lift 260 / 254 deg int/exh
• Gross Lift .562 in int/exh
• Lobe Center 106 deg
• Advance 6 deg
• Valve Lash .018 / .018
• 4-7 Swap has broader torque curve.
• Use #3400 for dual spring, 1.440 OD, 1.800 install ht
• Use #E915043 for dual spring, 1.580 OD, 1.950 install ht

For Lifters and Camshaft Kits see below.