function custom_product_price($price, $product) {
    // Change the price for product with ID 46
    if ($product && $product->get_id() === 46) {
        $price = '500.00'; // Set the desired price
    }

    return $price;
}

add_filter('woocommerce_get_price_html', 'custom_product_price', 10, 2);
add_filter('woocommerce_cart_item_price', 'custom_product_price', 10, 2);
add_filter('woocommerce_cart_item_subtotal', 'custom_product_price', 10, 3);