Engine - GM Performance Short Block Engines - Bow Tie Sportsman 400 Main Size

From GM Performance - This iron block is fully CNC machined from the H-D 10051184 casting. It has siamesed cylinder walls, cast nodular caps, four bolts on all five main caps; the outer bolts on the three center main caps are splayed 20 degrees. Grade 8 bolts secure the caps. It features priority main oiling and 9.025 inch deck height. The block comes finished at 4.117 inch and the maximum recommended bore is 4.155 inch. This block feature a two-piece rear main seal; 400 main size (2.65 inch). It features lifter bore heights (.842 inch), same as P/N 24502503. Technical Note: It may be necessary to clearance top of lifter bores with some roller lifters. The block requires 2 inch O.D. cam bearings at all five locations (P/N 12370843 set).

From GM Performance - This iron block is fully CNC machined from the H-D 10051184 casting. It has siamesed cylinder walls, cast nodular caps, four bolts on all five main caps; the outer bolts on the three center main caps are splayed 20 degrees. Grade 8 bolts secure the caps. It features priority main oiling and 9.025 inch deck height. The block comes finished at 4.117 inch and the maximum recommended bore is 4.155 inch. This block feature a two-piece rear main seal; 400 main size (2.65 inch). It features lifter bore heights (.842 inch), same as P/N 24502503. Technical Note: It may be necessary to clearance top of lifter bores with some roller lifters. The block requires 2 inch O.D. cam bearings at all five locations (P/N 12370843 set).