Dan Linfoot doubled up to make it two out of two at Knockhill as he beat Richard Kerr to the race two win.
Third place went to Alastair Seeley, as Billy McConnell eventually took fourth after a tough four-way battle and Franco Bourne finished fifth.
Pirelli National Superstock Championship with Santander Consumer Finance, race two result:
1. Dan Linfoot (Optimum Bikes Racing Ltd)
2. Richard Kerr (AMD Motorsport) +4.621s
3. Alastair Seeley (SYNETIQ BMW Motorrad) +5.943s
4. Billy McConnell (C&L Fairburn Properties Jackson Racing) +11.513s
5. Franco Bourne (Marvel HCL Motorsport) 11.920s