The TSX's K24A isn't wimpy, but when you pair it with a 3,300-pound chassis it leaves you wanting more. A cold-air intake, a header, and an exhaust system are the most logical places to go looking for more horsepower so that's where Arpon started. The combination consists of a K&N cold-air intake, a DC Sports 4-2-1 ceramic-coated header, and a Skunk2 stainless-steel cat-back exhaust system. Each mod takes less than an hour to install and, when paired together, is good for nearly 30 extra horsepower-even on a slushbox-equipped K24A like Arpon's. Best of all, both the K&N intake and the DC Sports header are CARB legal, which means guys like Arpon won't have to dodge the cops everywhere they go. Of course, everything bolted up as planned and comes with everything we needed for a trouble-free install, like exhaust gaskets, hardware, and hose clamps. Arpon wasn't looking for much power-wise-he's got his hatchback for that. He was more interested in the more aggressive exhaust note and a few new shiny parts he could polish in his spare time. But Bisimoto Engineering's Dynapack surprised him. With just basic bolt-ons the K-series pushed out 201.4 hp, more than 28 hp than before. Best of all, horsepower and torque gains are obvious across the board. Even with the supplied Skunk2 silencers, we still gained nearly 24 hp. Not bad for a daily driver.