Polaris Slingshot with a Turbo LS3

Alpha Powersport is located in Houlton, Wisconsin and specializes in aftermarket service and products for the Polaris Slingshot. They recently made news by building maybe the most powerful Slingshot in the world.

Alpha Powersport calls their creation the Monster 62RR because instead of the factory 2.4 L Ecotec inline-four there sits a 6.2 L LS3 V8. That is a monumental increase in power and torque for a vehicle that only weighs 1,750 lbs.

If increasing the power from 173 horsepower to 430 horsepower wasn’t enough the team decided to install a Precision 76 mm turbocharger taking the power level to 750 horsepower. This results in the Monster 62RR having a 258% increase in displacement and a 433% increase in horsepower.

With so much power the factory five-speed manual transmission was replaced with a GM 4L65E automatic transmission with a custom shifting system developed by Alpha Powersport.

Since building the Monster 62RR, Alpha Powersport has received several orders for LSx-powered Slingshots. If you are interested in having one built for you Alpha says they cost between $30K-35K depending on options.

Source: Slingshot Forums (build thread) and Alpha Powersport via LSxTV