As the 1998 NASCAR Winston Cup season began ... inches (as opposed to the 4.4 inches in the SB2). The R07 block design uses a six-bolt head bolt pattern as opposed to the traditional five-bolt ...

The engine, known as the R07, has finally been approved by NASCAR for Cup competition and ... It places an exhaust valve at the edge of the head, followed by two intakes, two exhausts, two intakes ...

Per NASCAR regulations, the R07 displaces a maximum of 358 cu in ... that improve coolant flow around the cylinder barrels, a new six-head-bolt pattern that improves the head-gasket seal and ...

Heading into Saturday night’s race (8 p.m. ET, FS1, MRN, SiriusXM NASCAR), the R07 has powered drivers to 156 victories in NASCAR’s elite division. That first victory, Suhy said, was “huge.” ...

In a different article this month, you'll see inside Chevrolet's R07 NASCAR Sprint Cup engine and ... the latest and greatest technology in head porting or other advances. "That's the difference ...

The R07 succeeded the SB2 as the GM small-block V-8 for racing, and some of the original 25 blocks are still being used in the NASCAR Xfinity Series and truck series. That’s impressive given the ...

Under the hood sits a Chevrolet R07 fuel-injected race engine making a monstrous 725 horsepower. Inside, you'll find a new NASCAR-spec safety cell, a carbon fiber dashboard, and a fire suppression ...