Prasert Manukit Road (Thai: ถนนประเสริฐมนูกิจ) or Highway 351, commonly known as Kaset-Nawamin Road (Thai: ถนนเกษตร-นวมินทร์), is a highway in Bangkok, Thailand.

It begins at Kasetsart Intersection on Phahonyothin Road, Chatuchak district, as a continuation after the end of Ngamwongwan Road, and runs east until its end at a three-way intersection with Nawamin Road, in Bueng Kum district.

The Bangkok Road Naming Commission formally changed its name to Prasort Manukit Road in 2006.

However, in popular practice and on many maps, Kaset-Nawamin Road is still common.

This change was met with complaints from the public, and in 2004 the road's name was changed back.