Uses your factory 5.3 Gen III or IV block, bored to 3.898" bore, and using our TAP 4340 forged steel 4.000" stroke crankshaft. This creates a 383 cubic inch (6.3 liter) max effort '5.3' powerhouse. Make it complete with a TAP custom grind camshaft, and TAP ported 799/243 cylinder heads. We can install and tune as well. If you have any questions please contact us info@taplv.com or 1-725-242-6740

- GM 5.3 Iron Block

- 3 Stage Cleaning Process

- Cylinders honed. Deck resurfaced

- Crankshaft balance

- Mahle forged/coated PowerPak pistons @ 3.790/3.800" bore

- King XP Series Tri-Metal Race Bearings (Coated available)

- TAP forged H-Beam Connecting Rod

- ARP 8740 Series Connecting Rod Bolts (2000 available)

- TAP 4340 Fored Steel Crankshaft

- New Engine Oil Galley Plug Kit

*Please allow 2-4 weeks for build time.