3-5/8\" big bore piston set. Used with 3 5/8\" big bore cylinders with 5.330\" (stock) to 5.530\" (+.200\") length. Use with 4-1/4\" stock stroke (88\"), 4-1/2\" (93\"), 4-5/8\" (96\") to 4-3/4\" (98\") stroker flywheels. 10.0:1 CR. Piston weight 385gr. Piston pin weight 97gr. Head type: Dome / Dome -57cc. Compression height 1.285\" / Bore 3.625\" (3 5/8\"). Stroke 4.250\" to 4.750\" (4-1/4\" to 4-3/4\"). Rod length 7.440\" / Cyl. length 5.330\" (Std) to 5.530\" (+.200\"). Comes with T5 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions. Note: 5.330\" cylinders can be used with stock 4-1/4\" stroke. Longer strokes require correct length longer cylinders or stroker plates to achieve the desired compression ratio. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components, prior to installation.