HS 1.7 Rockers
So I have a 99 Durango with the 318. Mods, k&n cai, msd blaster ss coil, 8mm wires, helix tb spacer, ss headers, straight pipe exhaust with hi flow cat, superchips flashpaq on 91 tune, and most recently hs 1.7 roller rockers. I ordered the rockers because of all the good things guys on here have said about them. I got them, put them on and... no difference in performance or mileage whatsoever. Only thing they did was give it a helluva smooth idle and smoother throughout the rpm range. No extra hp, tq, or mileage. Did I do something wrong? I reset the pcm when I installed them and they have about 500 miles on them? Or is this just my luck?