Callies Ultra Billet Crankshaft - 4.000" Stroke - Cleveland Mains

CALLIES CRANKSHAFT - ULTRA BOOST - 4.000" STROKE - CLEVELAND 2.750" MAINS - APO-71@-UB
Callies Ultra billets are machined from Premium Grade Timken alloy steel. This high quality steel creates a level of toughness that is unmatched in the crankshaft industry. Each Ultra billet crankshaft is uniquely machined with Ultra-Shed counterweight profiles. The Ultra-Shed profile gently moves oil away from the oncoming counterweight while the directional trailing edge directs oil away from the oncoming rod journal. Aero-Shed Super Finish is then used to give you a crankshaft that is totally stress-riser free and incredibly aero efficient. When the Ultra-Shed and Aero-Shed processes are combined, the result is a crankshaft with the lowest coefficient of drag in the industry.
Features:
Stroke Range: 2.600 in – 4.600 in.
LS1, LS7, LT1 posts are available
6, 8, or 9 bolt pattern flange options
Rod Sizes: 1.850, 1.888, 2.000,
2.100
, 2.200 w/sbc width, 2.200 BBC width
Main Journal Sizes: Standard LS, Iron Duke,
Ford Cleveland 351
8 or 6 counterweight designs available
Sold complete w/no drill balance
Aero efficient Ultra-Shed counterweight profiling is standard
Aero-Shed super finishing included with all Ultra Billets
All Ultra LS billets are produced from Timken 4330 alloy steel