What is the best modification for increasing horsepower in a Nissan 370Z?

I have a stock Nissan 370Z and I want to increase its horsepower. What is the most effective modification for achieving this without breaking the bank?

A cold air intake or a performance air filter are popular and affordable options for increasing horsepower in a Nissan 370Z. They allow for better air flow into the engine, resulting in improved performance.

Upgrading the exhaust system can also provide a significant horsepower boost. Look for a high-flow exhaust system that reduces backpressure and increases horsepower.

For a more substantial increase in horsepower, consider investing in a turbocharger or supercharger kit. These will require a larger investment upfront, but will provide a significant power boost.