These PBM Rotating Assemblies offer race proven quality components at a reduced package price. Forged 4340 crankshafts, H-beam rods, forged pistons and file fit rings are standard in these popular combinations.- 421 cubic inch
- 3.875 stroke x 4.155 bore
- PBM Forged 4340 Steel Crankshaft
- 6.00in H-beam rods
- Flat Top Forged JE Pistons
- Comp Ratio 13.6 @ 52cc / 13.1 @ 55cc / 12.6 @ 58cc
- File Fit Rings
Other Combinations Available - Custom Assemblies our Specialty - Please Inquire Hundreds of stroke & bore combinations available |
Cams / Lifters /Timing Sets
