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Which improvement did you make on your Celica to increase horsepower and improve overall performance?

Installing a cold air intake system can increase horsepower by allowing more oxygen into the combustion chamber, resulting in a more efficient burn.

Upgrading to a performance chip or tuner can optimize fuel-air mixture and ignition timing, providing a noticeable improvement in horsepower and acceleration.

Replacing the factory exhaust system with a more free-flowing unit can increase horsepower and improve sound, as restrictive factory exhausts can hinder performance.

Coilovers not only improve handling and stability but can also slightly increase horsepower due to better suspension geometry and reduced drag.

Properly maintaining and replacing worn-out parts, such as spark plugs, ignition coils, and oxygen sensors, can improve horsepower and overall performance.

A well-tuned and maintained engine can withstand performance modifications better, reducing the risk of premature failure.

Adding nitrous oxide can significantly increase horsepower, but it also puts additional stress on the engine, requiring upgrades to critical components like pistons and connecting rods.

Increasing the size of the throttle body can improve airflow into the engine and increase horsepower, especially when combined with other performance upgrades.

Lowering the vehicle can help improve handling by reducing the center of gravity and aiding in aerodynamics, though this doesn't directly increase horsepower.

Swapping the factory transmission for a more robust unit can handle the increased power and torque from engine modifications, improving overall performance and longevity.

Regularly maintaining and servicing the vehicle, including oil changes, tire rotations, and inspections, can help maintain and even improve horsepower and performance over time.

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