2 sec search got me this on the TBSS intake: https://www.performancetrucks.net/fo...ectors-481549/ and not sure what you mean by how much duty cycle is left, that's depending on your motor setup/fuel/tune etc. I could be running 90% on my truck with 10% left to max out but you could put them in yours and be running 80% with 20% left to max.

 

Do you have a pic of the part number on the side of the injector? I'm interested!!!

 

yup, 25343789, 8.1 injectors.

 

P.M. Sent

 

bumpity

 

Paypal sent

 

Thank ya sir....sold!