by ellis93 » Fri Mar 23, 2012 8:01 pm
I didn't when I did mine.
One thing,one sides insulator is thicker than the other,keep that in mind.
Was on mine at least

93 D250 ,5 speed,4.11s,k&n autometer tach pyro trans boost guages,GDS 60mm h1c 14cm,honed 5x10,hplp/reg,1/8 timing,M+H M2 fuel pin, tims cooler tubz