Home / Shop / TCI Machined 168-Tooth Flexplate 399753 Flexplate, 168-Tooth, Internal Engine Balance, 1-Piece Rear Main Seal, SFI 29.1, Each

TCI Machined 168-Tooth Flexplate 399753 Flexplate, 168-Tooth, Internal Engine Balance, 1-Piece Rear Main Seal, SFI 29.1, Each

SKU: TCI399753

Flexplates

Tci Auto

TCI Machined 168-Tooth Flexplate 399753 Flexplate, 168-Tooth, Internal Engine Balance, 1-Piece Rear Main Seal, SFI 29.1, Each

SKU: TCI399753

Flexplates

IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.

We accept

Description

IMPORTANT NOTICE: Includes crankshaft bolts and pilot hub adapter for use when installing an early, non-LS transmission. This will not fit 1999-2000 6.0L applications with 0.400 in. extended crank flange and came with flat flexplate. This will not fit 1999-2000 4.8L applications that originally came with a manual transmission.

For serious performance, TCI machined SFI-approved flexplates are a "must have". These .140 in. thick flexplates are constructed of A514 Blanchard ground steel and are SFI 29.1 approved. TCI offers a complete line of Chrysler and Ford flexplates with GM and Ford bolt patterns for use with their adapter plate kits as well as neutral balanced flexplates with 168-tooth and 166-tooth starter rings for Chevy and Pontiac applications. Now you can speed down the track with the confidence of TCI machined SFI-approved flexplates.

Part Type

SFI Flexplate GM LS1

Data: v4.2 - Upd: 2026-10-23 20:06:12

Specifications

Product Attributes - Brand: TCI Auto
Product Attributes - Manufacturer's Part Number: 399753
Product Attributes - Part Type: Flexplates
Product Attributes - Product Line: TCI Machined Flexplates
Product Attributes - UPC: 788120030274
Product Attributes - Ring Gear Tooth Quantity: 168-tooth
Product Attributes - Flexplate Diameter (in.): 14.00
Product Attributes - Engine Balance: Internal
Product Attributes - Flexplate Material: Steel
Product Attributes - SFI Rating: SFI 29.1
Product Attributes - Marine Use: No
Product Attributes - Quantity: Sold individually.
Product Attributes - Notes: Includes crankshaft bolts and pilot hub adapter for use when installing an early, non-LS transmission. This will not fit 1999-2000 6.0L applications with 0.400 in. extended crank flange and came with flat flexplate. This will not fit 1999-2000 4.8L applications that originally came with a manual transmission.

Reference Information

Brand Name/s	Tci Auto
StreetFX SKU	tci399753
SFX Item ID	5058394
Supplier Item Code	5058394
Manufacturer SKU	399753
Manufacturer UPC	788120030274
Alternative References	168-Tooth, 1-Piece

Compatibility

Application Data

Application Notes	Includes crankshaft bolts and pilot hub adapter for use when installing an early, non-LS transmission. This will not fit 1999-2000 6.0L applications with 0.400 in. extended crank flange and came with flat flexplate. This will not fit 1999-2000 4.8L applications that originally came with a manual transmission.
Beginning Year	1998
Converter Bolt Pattern	11.063 in.
Crankshaft to Flywheel/Flexplate Attachment	6-bolt
Ending Year	2004
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	5.7L/350
Engine Type	V8
Make	CHEVROLET
Transmission Manufacturer Code	THM700-R4/4L60/MD8

Application Notes	Includes crankshaft bolts and pilot hub adapter for use when installing an early, non-LS transmission. This will not fit 1999-2000 6.0L applications with 0.400 in. extended crank flange and came with flat flexplate. This will not fit 1999-2000 4.8L applications that originally came with a manual transmission.
Beginning Year	1999
Converter Bolt Pattern	10.750 in.
Crankshaft to Flywheel/Flexplate Attachment	6-bolt
Ending Year	2004
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	5.7L/350
Engine Type	V8
Make	CHEVROLET
Transmission Manufacturer Code	THM350

Application Notes	Includes crankshaft bolts and pilot hub adapter for use when installing an early, non-LS transmission. This will not fit 1999-2000 6.0L applications with 0.400 in. extended crank flange and came with flat flexplate. This will not fit 1999-2000 4.8L applications that originally came with a manual transmission.
Beginning Year	1999
Converter Bolt Pattern	10.750 in.
Crankshaft to Flywheel/Flexplate Attachment	6-bolt
Ending Year	2004
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	5.7L/350
Engine Type	V8
Make	CHEVROLET
Transmission Manufacturer Code	THM700-R4/4L60/MD8

Application Notes	Includes crankshaft bolts and pilot hub adapter for use when installing an early, non-LS transmission. This will not fit 1999-2000 6.0L applications with 0.400 in. extended crank flange and came with flat flexplate. This will not fit 1999-2000 4.8L applications that originally came with a manual transmission.
Beginning Year	1999
Converter Bolt Pattern	10.750 in.
Crankshaft to Flywheel/Flexplate Attachment	6-bolt
Ending Year	2009
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	4.8L/294
Engine Type	V8
Make	CHEVROLET
Transmission Manufacturer Code	THM350

Application Notes	Includes crankshaft bolts and pilot hub adapter for use when installing an early, non-LS transmission. This will not fit 1999-2000 6.0L applications with 0.400 in. extended crank flange and came with flat flexplate. This will not fit 1999-2000 4.8L applications that originally came with a manual transmission.
Beginning Year	1999
Converter Bolt Pattern	10.750 in.
Crankshaft to Flywheel/Flexplate Attachment	6-bolt
Ending Year	2009
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	4.8L/294
Engine Type	V8
Make	CHEVROLET
Transmission Manufacturer Code	THM700-R4/4L60/MD8

Application Notes	Includes crankshaft bolts and pilot hub adapter for use when installing an early, non-LS transmission. This will not fit 1999-2000 6.0L applications with 0.400 in. extended crank flange and came with flat flexplate. This will not fit 1999-2000 4.8L applications that originally came with a manual transmission.
Beginning Year	1999
Converter Bolt Pattern	11.063 in.
Crankshaft to Flywheel/Flexplate Attachment	6-bolt
Ending Year	2009
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	4.8L/294
Engine Type	V8
Make	CHEVROLET
Transmission Manufacturer Code	THM700-R4/4L60/MD8

Application Notes	Includes crankshaft bolts and pilot hub adapter for use when installing an early, non-LS transmission. This will not fit 1999-2000 6.0L applications with 0.400 in. extended crank flange and came with flat flexplate. This will not fit 1999-2000 4.8L applications that originally came with a manual transmission.
Beginning Year	2001
Converter Bolt Pattern	11.063 in.
Crankshaft to Flywheel/Flexplate Attachment	6-bolt
Ending Year	2006
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	5.3L/325
Engine Type	V8
Make	CHEVROLET
Transmission Manufacturer Code	THM700-R4/4L60/MD8

Application Notes	Includes crankshaft bolts and pilot hub adapter for use when installing an early, non-LS transmission. This will not fit 1999-2000 6.0L applications with 0.400 in. extended crank flange and came with flat flexplate. This will not fit 1999-2000 4.8L applications that originally came with a manual transmission.
Beginning Year	2001
Converter Bolt Pattern	10.750 in.
Crankshaft to Flywheel/Flexplate Attachment	6-bolt
Ending Year	2009
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	5.3L/325
Engine Type	V8
Make	CHEVROLET
Transmission Manufacturer Code	THM350

Application Notes	Includes crankshaft bolts and pilot hub adapter for use when installing an early, non-LS transmission. This will not fit 1999-2000 6.0L applications with 0.400 in. extended crank flange and came with flat flexplate. This will not fit 1999-2000 4.8L applications that originally came with a manual transmission.
Beginning Year	2001
Converter Bolt Pattern	10.750 in.
Crankshaft to Flywheel/Flexplate Attachment	6-bolt
Ending Year	2009
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	5.3L/325
Engine Type	V8
Make	CHEVROLET
Transmission Manufacturer Code	THM700-R4/4L60/MD8

Application Notes	Does not fit engines with cast iron cylinder heads. Includes crankshaft bolts and pilot hub adapter for use when installing an early, non-LS transmission. This will not fit 1999-2000 6.0L applications with 0.400 in. extended crank flange and came with flat flexplate. This will not fit 1999-2000 4.8L applications that originally came with a manual transmission.
Beginning Year	2001
Converter Bolt Pattern	10.750 in.
Crankshaft to Flywheel/Flexplate Attachment	6-bolt
Ending Year	2009
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Engine Type	V8
Make	CHEVROLET
Transmission Manufacturer Code	THM350

Application Notes	Does not fit engines with cast iron cylinder heads. Includes crankshaft bolts and pilot hub adapter for use when installing an early, non-LS transmission. This will not fit 1999-2000 6.0L applications with 0.400 in. extended crank flange and came with flat flexplate. This will not fit 1999-2000 4.8L applications that originally came with a manual transmission.
Beginning Year	2001
Converter Bolt Pattern	10.750 in.
Crankshaft to Flywheel/Flexplate Attachment	6-bolt
Ending Year	2009
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Engine Type	V8
Make	CHEVROLET
Transmission Manufacturer Code	THM700-R4/4L60/MD8

Application Notes	Includes crankshaft bolts and pilot hub adapter for use when installing an early, non-LS transmission. This will not fit 1999-2000 6.0L applications with 0.400 in. extended crank flange and came with flat flexplate. This will not fit 1999-2000 4.8L applications that originally came with a manual transmission.
Beginning Year	2001
Converter Bolt Pattern	11.063 in.
Crankshaft to Flywheel/Flexplate Attachment	6-bolt
Ending Year	2010
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Engine Type	V8
Make	CHEVROLET
Transmission Manufacturer Code	THM700-R4/4L60/MD8

Loading compatibility information...

Keep shopping

TCI Machined 168-Tooth Flexplate 399753 Flexplate, 168-Tooth, Internal Engine Balance, 1-Piece Rear Main Seal, SFI 29.1, Each

TCI Machined 168-Tooth Flexplate 399753 Flexplate, 168-Tooth, Internal Engine Balance, 1-Piece Rear Main Seal, SFI 29.1, Each

Description

Part Type

Specifications

Reference Information

Compatibility

More from Tci Auto

TCI Ultimate StreetFighter 3,500-3,800 Stall Torque Converter 241003 Converter, StreetFighter, TH350/TH400, Chevy, Each

TCI Forged 168-Tooth Flexplate 399773 Flexplate, 168-Tooth, External Engine Balance, 1-Piece Rear Main Seal, SFI 29.1, Chevy, 5.0/5.7L, Each

TCI StreetFighter 3,000-3,600 Stall Torque Converter 242970 Converter, StreetFighter, Chevy, 2006-12 6L80E, Each

TCI Max Shift Synthetic Transmission Fluid 950655 Automatic Fluid, Synthetic, Dexron/Mercon, 1 qt., Each

TCI RollStop Kits 861700 Line Lock, 1/8 in. NPT Inlet/Outlet, Natural Aluminum, Each

TCI Ford Speedometer Driven Gears 881004 Gear, Driven, 23-Tooth, White, C4/C5/C6/AOD, Service Retrofit, Each