no, lock washers. i decided just to start cranking one down since the other thread seemed to say the m10 x 1.5 was correct and 1 by 1 they all managed to make it all the way down the stud so that was correct. my manifolds came in a turbo kit and were coated and seems i should've made sure the threads were cleaned up vs just looking at them and thinking they were good to go.
this problem is solved, now i have much larger ones! lol whole other story i'll save for the build thread when the time comes.
__________________ SOLD 9/7/13:62k mile 2001 SS GT47-88 on a modified KYTP truck mani kit, TSP 402, 10.2:1cr, 317's, Vic Jr, EPP Cam, 160# Inj,
FTI 9.5" Converter, TH400 w/Brake, MWC 9" & Full Rear Suspension, 3.25 gear. Driven 120 Miles RT to the track! Build completed 10/20/12..Bests-17psi, 1.29 sixty, 5.81 1/8th, 122mph, 9.06 1/4, 152mph 3400# on base tune Goin' 8's in 2013!! Went 8.75 @ 156 under new ownership 949 rwhp @ 22psi on 110 oct. Dyno Vidhttp://youtu.be/AxWt9hmEEto