Highlights in this issue include a conversation with Marvin Riley, insights into the ECR Chevrolet 5.5L DP V8 2015 & the Daimler-Benz DB601 roller bearing con rod evaluation. A dossier on the Aprilia RSV4 World Superbike V4, APS Motorsports Rover V8 and a special investigation into pistons and motor controllers as well as focus articles covering valves & surface treatments.