The STI has a very comprehensive performance and suspension build. The motor was built using Cosworth components and runs a GT35R turbo capable of 600hp. We conservatively tuned the car at only 20psi using the ECUTEK tuning software which it makes a strong 400whp which is 500 at the crank. Breytingarnar Engine Agency Power GT35R Ball Bearing Turbo Kit (Includes stainless uppipe, catless downpipe, Tial Wastegate, proper oil and water lines, and intercooler adapter pipe. Agency Power 3 Inch...