HOL-319-504 Holley Complete Transmission Installation Kit – 6-Bolt LS Engine to TKX / TKO
Everything you need to connect a 6-Bolt LS Engine to a Tremec TKX or TKO Transmission
Features
- All hardware included
- Works with OE (original equipment) or MSD High Torque starters
- Roller style pilot bearing offers improved shifting by reducing parasitic drag and transmission wear
- 26-spline, 12-inch organic sprung clutch offers superior clamping force and smooth engagement for engines up to 550 Naturally Aspirated Horsepower (500 w/ Power Adder)
- Billet steel flywheel for light weight (28 pounds) and additional strength
- Light weight cast aluminum bellhousing and stamped steel dust cover provides factory-like installation and appearance
- Designed for Gen III/Gen IV Small Block Chevrolet Engines with 6-bolt crank/flywheel using a TKX or TKO transmission
- Adjustable Hydraulic Release Bearing offers reduced pedal effort and easy installation
The 319-505 is very similar to the 319-504 but is designed to be used with the 8-bolt flywheel LS and Gen V LT engines that come after 2009 (LSA, LT1, LT4, L83, and similar truck engines).
These Holley Transmission Installation Kits come complete with everything you need to bolt a TKX or TKO transmission to almost any Gen III, Gen IV, and Gen V Small Block Chevrolet Engines with a 6-bolt or 8-bolt flywheel. Built with a mixture of our best brands including Lakewood and Hays, this kit includes a bellhousing, billet steel flywheel, clutch and pressure plate, hydraulic release bearing, roller pilot bearing, and all hardware needed to install these components.
The 319-504 is set up to be used with the 6-bolt flywheel LS engines which are the majority of the Gen III and Gen IV engines produced before 2009 (LS1, LS2, LS3, LS6, LS7, LM7, LQ9, L33, and similar truck engines).
Attributes:
| Flywheel Material | Billet Steel |
| Bellhousing Material | Aluminum |
| Brand | Holley |
| Category | Transmission |
| Crankshaft Bolt Hole Count | 6 |
| Disc Diameter | 12 |
| Disc Material | Organic |
| Disc Style | Spring Hub |
| Emission Code | 5 |
| Engine | GM Gen III/IV (LS) |
| Engine Make | GM |
| Grade Type | Performance |
| Hardware | Steel |
| Input Shaft Diameter | 1-1/8 in. |
| Input Spline | 26 |
| part type | Transmission Installation Kit |
| PILOT BEARING | Roller |
| Pressure Plate Style | Diaphragm |
| Product Type | Installation Kit |
| RELEASE BEARING | Hydraulic |
| Sub Category | Manual Transmission Components |
| Transmission | TKX GM |
| Transmission | TKO GM |






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