I installed a Black Widow header after doing a valve clearance/adjustment. The dry fit seemed fine, but on final assembly the pipe is right on the plastic of the lower coweling. Exhaust paste in the kit was used and I can’t get the Y collectors apart to reposition everything. Is there a safe solvent that might creep in the pipe joint enough to get the pipes to move and separate? I am beside myself in my stupid mistake and fear I might need to buy another header. Any suggestions from my forum brothers will be greatly appreciated!