Mamoon's R32 GTR makes 410kw with his standard motor.
Check out the dyno video and photos. 

Modifications currently done are HKS twin turbo's, Apexi Power FC, fuel injector upgrade including fuel pump, after market front mount intercooler, aftermarket head gasket, air filters, full exhaust system.

Apart from these modifications the engine is as factory. Pretty impressive if you ask me.

The car's personal best down the 1/4 mile is 10.8 at 128 mile/hr.

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