851LM 4.6L MODULAR 4V PISTONS Coyote Bore 3.631" with 3.750" Stroke

Sale price $1,695.00

Part Number: 851LM


Want big displacement? Here is the answer. Coyote bore 3.631" with 3.750" stroke. 5.0L + Displacement!

The L&M Difference - When Off the Shelf Won’t Make the Cut

Why settle for “Off the Shelf” products?

Here at L&M, we go above and beyond standard engine building design to offer specialized products that meet the highest performance requirements.


  • Ceramic coated tops for heat dissipation
  • Teflon coated and Reinforced skirts for friction reduction and strength
  • Hardened tool steel wrist pin for lifespan longevity
  • Built in, not cut, valve pockets


  • Bore: 3.631"
  • Pin:  .866" x 2.500" with .200" Wall
  • CC's: -7.0cc
  • Relief: .150" intake x .05" exhaust valve pockets
  • Crown: .300" down minimum
  • Skirt: .130" Minimum