Which timing cover gasket do I get?

[gnx547]

On Rockauto there are 2 different Felpro timing gaskets. One is Sleeve N Seal and the other is without. What does this mean? What is Sleeve N seal?


FEL-PRO Part # TCS45449 View attachment 137101 View attachment 137103
View attachment 137105 View attachment 137107 w/o Sleeve 'N' Seal®; Eng. w/one-piece oil pan Gasket. must be used w/OS 34508R; Water pump to plate gskts. not incl.

FEL-PRO Part # TCS45450 View attachment 137109 Timing Cover Set w/Sleeve
View attachment 137111 View attachment 137113 Type: Timing Cover Set w/Sleeve; w/Sleeve 'N' Seal®; Eng. w/one-piece oil pan Gasket. must be used w/OS 34508R; Water pump to plate gskts. not incl.

 

[ratio411]

Some TC kits come with a sleeve to repair a severely worn or damaged balancer sprocket surface.
Allows the front seal to ride on a smooth surface rather than get chewed up by a rough balancer.
I don't think a Ford balancer ever lasted long enough to need one of these...