The product attaches to the fuel supply line that leads from the gas tank and allows tuners to reduce fuel pressure at wide-open throttle, which has the same effect as installing a smaller main jet on a carbureted engine.

The PAC System sells for $219 and includes a fuel pressure gauge that mounts to the console. Installation takes about 10 minutes, the company said. D&D Racing, 315/376-8013; www.ddracing.com.

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