1719 Oil pump drive shaft, +.005" od

This Jims oil pump drive shaft is engineered with a +.005 inch oversized outer diameter to address wear in 1970 through 1999 Big Twin engine cases, excluding Twin Cam models. In high-mileage Shovelhead or Evolution engines, the oil pump shaft bore can often become enlarged, leading to oil pressure loss or pump instability. By using this oversized shaft, you can machine the case to a fresh, oversized dimension, ensuring a perfect fit and restored mechanical integrity. Like all Jims products, it is manufactured to incredibly tight tolerances, providing a professional solution for salvaging and improving older engine cases during a rebuild. It is a critical component for achieving a high-quality, long-lasting engine overhaul.