This is a GN1Performance "STROKER KIT" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6.The stroker kit you guys have been waitin for. This kit comes with a 3.625 stroker crank, skat 5.970 h beam rods, and JE pistons. This kit has the extra edge for mid range and top end due to the advange of our 5.970 rods verses the standard 5.960 rods most other kits use. Gn1performance has the exclusive to this kit.

*All stroker kits require minor machine work