Boss 302-NA vs. Kenne Bell 3.6L (15.5 psi) Only from forced induction do you see power gains of this magnitude. The already impressive Boss motor produced just under 400 wheel hp (rated at 444 flywheel hp) and 350 lb-ft of torque. The variable cam timing ensured a broad torque curve, which continued once we added boost. Installation of the Kenne Bell supercharger kit (at 15 psi) resulted in a jump in power to 722 hp and 556 lb-ft of torque. Nothing beats the wail of a supercharged mod motor running at 7,500 rpm!