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Cayman GT4 with a Stroked 4.2 L Flat-Six

front-side view of a Porsche Cayman GT4 race car

This 2016 Porsche Cayman GT4 (981) came from the factory with a 3.8 L flat-six. It is now powered by a 911 GTS flat-six built by BGB Motorsports with displacement increased to 4.2 liters. The motor features a stroker crankshaft, BGB Motorsports rods, 105 mm pistons, Nikasil cylinder coating, ported heads, BGB Motorsports intake system, and SOUL Performance exhaust headers. Behind the motor is a six-speed transaxle with a custom gearset and Guard limited-slip differential. The Cayman’s suspension uses JRZ RS Pro reservoir shocks and lowering springs. Braking is handled by Brembo six-piston calipers in front and four-piston calipers in rear. Both have slotted and ventilated rotors. Over those are BBS E88 18-inch wheels wearing Yokahama Advan slicks. You can view more photos and specs on the Bring a Trailer listing.

front view of a Porsche Cayman GT4 race car

side view of a Porsche Cayman GT4 race car

rear-side view of a Porsche Cayman GT4 race car

front view of a Porsche Cayman GT4 race car

rear view of a Porsche Cayman GT4 with rear hatch open

underneath view of transaxle and exhaust in a Porsche Cayman GT4

underneath view of suspension in Porsche Cayman GT4

view of dashboard and steering wheel in Porsche Cayman GT4 race car

view of steering wheel and gauges in Porsche Cayman GT4 race car

view of Recaro racing seats in a Porsche Cayman GT4

Source: Bring a Trailer and photos by @aarievann

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