I just installed the Piers 370 injectors and timed at 15. 5. Now my EGTs at 60 MPH with WOT are at 1400
and climbing like a rocket. The truck weighs 7200, I also pull a 11,200 lb. trailer. What is your sugestion a 14cm or 16cm exhaust housing? I plan on replaceing the #8 plate with a #5 in the furture. From stock I have reduced the time from 0-40 by over 2 seconds and 0-60 by over 4 seconds I haven't checked 50-70 yet. 
Thanks for your help
Bruce 1dlsram


Thanks for your help
Bruce 1dlsram