Here is a hack for Excitebike which converts the bike into a car and also the level palettes have been changed.
No-Intro Name: Excitebike (Japan, USA)
(No-Intro version 20130731-235630)
File MD5: D7FE15CF2BC7B6582C07D12B3CF3BEDE
File SHA-1: 2E9897846E54A4A9865E87DE7517C6710BDEC255
File CRC32: 2BB33C69
ROM MD5: 9B0727E0ADB0A7B4F94E072B7CF28A5A
ROM SHA-1: BA8D9227A0D02B62EE6CB9E691FA5A5134C303A8
ROM CRC32: 49AEB3A6