Northern LS Modification Kit for GM Conversion M59LC The 1" diameter flange works

The 1" diameter flange works perfectly with most valve springs

Balanced To Assure High RPM Fuel Flow

352-428 and 429-460

Front Right

Northern LS Modification Kit for GM Conversion M59LC The 1" diameter flange worksLs1 Mod Kit Connections Whether Building Your First Hotrod, Updating Your Muscle Car Or Hitting The Race Track Every Weekend, Northern Radiator Has The High Performance Products You Have Come To Rely On. From Our All Aluminum Radiators, Fans and Shroud Assemblies, To Our Hose Connections And Radiator Mounts, We've Got You Covered! Northern Radiator is a distribution based company, providing high quality heating and cooling products for over 40 years.