400 Aluminum Bare Block

• A-356 aluminum competition block
• CNC-machined
• Siamesed bores with increased wall thickness
• 4.117" rough-finished bore
• 4.135" maximum bore
• 3.750" maximum stroke
• Splayed 4-bolt steel mains
• 400 main size
• Dry sump use only
• Tested to more than 800 horsepower!

Tech Specs

Part Number: 10134400
Cast Number: 10134398
Deck Height: 9.025"
Lifter Pattern: Std
Cyl Wall: Siamese
Bore Range: 4.117" – 4.135"
Main Bolt: 4
Main Bolt Degree: 20°
Cap Material: Steel
Crank Jnl Size: 400
Oiling: Dry
Seal Type: 2 pc
Max Stroke: 3.750"
Weight (lbs): 89
Max HP: 800
Usage: Pro

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