‘99-‘06 TC SLEEPER 98

Zipper’s Sleeper 98” kit adds 10 more cubic inches through an increase of the stock 88” 3.750” bore size to 3.937”! This is a similar kit to the 95” Sleeper kit, just 3 cubic inches larger via the bore size. Dyno sheet not available at press time, the curve will look nearly identical, just a bit more power everywhere.  The Sleeper 98 kit includes forged 3.937” pistons precision-fit to your decked & trued cylinders, Red Shift 511 cams and all gaskets. Add Zipper’s optional cam chest upgrade kit to update aging components with modern hydraulics.

This kit uses your factory cylinder cores sent in for modification


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