Drilling the pipes will NOT void your warranty.
Here's a thought, replace your stock horn with 2 car horns. At 128 decibls. when you hit it, they'll hear ya. And, I don't think this will void the warranty either. LOL
Here's a thought, replace your stock horn with 2 car horns. At 128 decibls. when you hit it, they'll hear ya. And, I don't think this will void the warranty either. LOL