they cost more.

and by raising the base fuel pressure, you can turn 450's into 500's. These DSM injectors typically cost anywhere from $30-$100 depending on the condition.

Check these out:

http://cgi.ebay.com/ebaymotors/ws/eB...ory=33554&rd=1

These are out of my friends car, cuz hes gettin 660's to go w/ his FP Green.