2 sentences for 改装 (gǎi​zhuāng — modify)

1. 这车改装了低音炮，声浪很强。

   zhè chē gǎi​zhuāng le dī​yīn​pào, shēng​làng hěn qiáng.

   This car has been modified with a subwoofer, and the sound is very powerful.

   Source: Dong Chinese Dictionary

2. 这辆旧车经过改装后，性能提高了不少。

   zhè liàng jiù chē jīng​guò gǎi​zhuāng hòu, xìng​néng tí​gāo le bù​shǎo.

   The performance of this old car improved significantly after being modified.

   Source: Dong Chinese Dictionary