Yes it will work but they are double what you need for 300whp. I would have 440's. You want an injector to be around 80% duty cycle to get the best spray pattern out of your injector. My 1600's are only at 40% right now but when i had 1,000's they were at 88%. As a rule of thumb you dont want to exceed 90% on the duty cycle. Otherwise your fuel sprays like crap. Like you putting your finger over a garden hose. Alot of people run more then 90% but that is asking for trouble. To get the best performance out of your set up match the injector to your fuel needs. 550's will be ideal. They are good to the 400whp range.