400 Bowtie Sportsman Block, 2-Piece Rear Main Seal

• CNC-machined cast-iron competition block
• +/-0.001" machining tolerances
• 4-bolt nodular mains, splayed caps on center three mains
• 4.117" finished bore
• 4.155" max bore (siamese cylinder bores)
• Extra smooth gasket surfaces for better seal
• Tall lifter bores

Part Number: 12480159
Cast Number: 10051184
Deck Height: 9.025"
Lifter Patter: Std
Cyl Wall: Siamese
Bore Range: 4.117" – 4.155"
Main Bolt: 4
Main Bolt Degree: 20°
Cap Material: Nodular
Crank Jnl Size: 400
Oiling: Wet
Seal Type: 2 pc
Max Stroke: 3.750"
Weight (lbs): 196
Max HP: 500
Usage: Amateur