Michael Dunlop made up for losing out on Supersport glory earlier in the day by taking a comfortable victory in Monday evening's Superstock race.
The Street Sweep Kawasaki rider overhauled Guy Martin early on and stormed clear to win by over 18 seconds, with John McGuinness beating the Relentless Suzuki rider to second place.
For Dunlop the hard work was done on a blistering second lap. At the end of the first, he trailed McGuinness and Martin but on lap two, Dunlop was a full 13 seconds quicker than his rivals with his lap clocked at 129.709mph.
By the time the riders reached Ramsey on the third lap, his lead was up to 19 seconds and the focus switched to battle for second with Keith Amor making ground to challenge Martin and McGuinness.
The Padgetts Motorcycles man got the better of Martin on lap three and held that advantage to the chequered flag, eventually claiming second by 4.27s. Amor was a further eight seconds back in fourth but any hopes Gary Johnson had of a podium challenge ended at Cregny Baa on lap three, retiring for the second race in sucession.
The battle for fifth went right to the wire with the two Wilson Craig Hondas running in close company in the closing stages. William Dunlop edged out Cameron Donald to claim the position but did so by the narrowest of margins, finishing just 0.48s ahead of the Australian.
Dan Kneen followed up his sixth place finish in the earlier Supersport race with seventh in the Superstock event with Michael Rutter finishing eighth for Riders Bathams Ducati. Adrian Archibald and James Hillier completed the top ten while Simon Andrews was highest privateer runner, finishing 11th outright.
With second place, McGuinness increased his TT Championship lead to 10 points over Amor while Ian Mackman extended his lead in the Privateers Championship despite finishing 15th overall.