You are looking at a nice used 5hp briggs raptor 3 racing engine! All of the block work was done by SBR! It is welded professionally ported and cut and chanfered! It has a dyno regrind cam and is 30 over steel bore! Let me know if you have any questions thanks! Briggs Raptor 4 Dual Bearing, Steel Bore Block This block is the newest design, its brand new and untouched in factory sealed box. This is a bare block with no extra parts included. No welding to reinforce lifter galley is needed with these new blocks.