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With the Zex kit installed, cooler spark plugs were a necessity. Lethal is a proponent of Brisk’s Silver Racing spark plugs (PN RR12S; $10.99). As such, the guys grabbed a fresh set off the shelf, and Jesse gapped them at 0.032-inch before installing them in the Boss. With the nitrous and fresh plugs on board, Jared flashed in a nitrous tune from Jon Lund and we were almost ready to rock the rollers. With the 150 pills installed, the Zex Blackout kit wowed us by adding gains of 172.33 hp and 295.38 lb-ft to the Boss’ already impressive rear-wheel tally. Then we added the 175 pills…