This rotating assembly is for those that prefer Diamond pistons with the reverse dome and tighter deck clearance. It starts with a 4340 forged steel 3.400” stroke crankshaft, brand new GM 763 casting rods with SPS bolts, and Diamond forged piston kit with moly rings. These kits are available in STD, .020, .030, and .040” oversizes.  This kit is recommended for turbo Buick’s running mid 10’s and slower. Compression ratio will be 8.4:1 w/ stock deck, .040” gaskets and 46 cc heads and 8.7:1 w/ 9.510” deck and .040” gaskets and 46 cc heads.

Parts Included:

Diamond Forged Pistons (DIA 21402 - Your Choice of Size)
Diamond Total Seal Moly Rings (DIA 09023830 - Your Choice of Size)
3.400" 4340 Steel Forged Crankshaft (WRE CSGN3400)
New GM 763 Connecting Rods (WRE CRGN763N)

Part Number: WRE RAGN3400GMD

Description: 3.8L Turbo Buick Rotating Assembly with Diamond Forged Pistons and Moly Rings, New GM Connecting Rods, and a 3.400" Stroke 4340 Steel Crankshaft.

Please select available options below, including piston/ring size.