PAC Racing RPM Series Valve Spring Dual Spring 369 lb/in Spring Rate 1.000" Coil Bind - 1.290" OD 2X-Large that are merely stock cold

that are merely stock cold stamped parts (some may be case hardened for a hard surface -- but they lack core strength)

3/16 in Pitch

Adapter Fitting 10AN To 3/4"NPT Aluminum 45 Degree

or a differential reading which indicates the difference between the two making this product ideal for comparing water/coolant

PAC Racing RPM Series Valve Spring Dual Spring 369 lb/in Spring Rate 1.000" Coil Bind - 1.290" OD 2X-Large that are merely stock coldProduct Description: Valve Spring RPM Series Dual Spring 369 lb in Spring Rate 1. 000 in Coil Bind 1. 290 in OD GM LS Series Set of 16 PAC Racing Springs is part of the Race Winning Brands Family. With more than 100 years of spring manufacturing experience. We understand the demands of racing and provide a commitment to all of our customers to provide the best service possible. We continue to expand products and offer expanded onsite technical