Callies Compstar Bbc 4.250 Stroke, 2.750 Mains, 2.200 Pins, 4340 BBP425-CS
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- Average Weight for4.500 in. Stroke Balanced to2350g Bob. = 72 lbs
- 8 Counterweight Design
- All Rod JournalsLightened
- HeatTreatment = Nitride Case
- Requires narrow bearings
Drawing from thedeep history of experience atCallies, our Compstarengineers have been able tocombine the bestcharacteristics ofperformance crankshaft designinto the Compstar"Compweight" for Big BlockChevy applications Producedfrom 4340 material that istriple heat treated andstress relieved duringmachining. Compstar BBCCompweights will remain trueduring severe duty use.
All Compstar Compweights arecenter counterweighted forreduced bearing loads duringhigh RPM use. Machined with.125 journal radii andconventional straight shotoiling, these cranks offersimple durability. With all 4rod journals drilled,Compstar BBC Compweightcranks weigh in at 75lbs orless. Compweights are fullydeep case nitrided.