Engine & Power
The engine is the heart of your Challenger — every performance mod either helps it breathe better, burn fuel more efficiently, or force more air in. These upgrades range from simple bolt-on air intakes to complete supercharger kits. Even small changes to how air and fuel get into the engine can make a noticeable difference in how the car feels.
Underdrive Pulleys
Your engine spins several accessories via a belt — the alternator, A/C compressor, power steering pump, and water pump. Each one steals a little bit of horsepower to operate. Underdrive pulleys are slightly smaller than stock, so these accessories spin slower and steal less power. It's a simple bolt-on that frees up 8-15 HP. The trade-off is slightly reduced accessory performance at idle (dimmer headlights, weaker A/C), though most people never notice.
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