[Bill Douglas]

Swindon Powertrain has developed a 24-valve cylinder head kit for the 964 and 993 engines that rocks redesigned four-valve per-cylinder castings to unlock more horsepower and torque. In-house testing has revealed that peak flow has improved by 40% at the inlet and 60% at the exhaust. What’s more, Swindon’s cylinder head reduces weight by 3.5 kg (7.7 lbs) and allows applicable engines to rev all the way to 12,000 rpm.


https://www.carscoops.com/2023/10/swindon-creates-porsche-911-cylinder-head-that-allows-air-cooled-engines-to-rev-to-12000-rpm/