Good Stuff that Right Stuff, I hard an oil leak under the front of my Indy intake and didn`t want to pull the manifold off, a little Right Stuff did the trick No more leak. I usually use the black Right Stuff when I purchased it for they manifold I didn`t realize I had bought the Gray Right Stuff but it worked out great as you can hardly see it there. The oil pan on my 363 always seemed to leak , a little Right Stuff fixed that also