Jason Ruby’s 1990 Nissan Silvia S13 has been powered by a RB-series inline-six for several years. However he realized the car needed an AWD system if he wanted to continue increasing the power. Under the hood sits a 3.0 L RB-series inline-six consisting of a RB25 head, RB30 block, CP pistons, Spool rods, and Tomei camshafts. It produces 900+ horsepower to the wheels thanks to a Precision 7675 turbocharger making 32 psi of boost, Haltech Elite 2500 Pro ECU, and tune by Matt Sims Performance. As mentioned before power goes through a R33 five-speed transmission with a PPG dog gear set into R32 GTR transfer case and differentials. At the most recent event the car had a best ET of 9.507 sec and best top speed of 157.34 mph.
A few videos of the car before the AWD drivetrain.