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FTI Performance TH400 Level 4 Transmissions TH400-4K21 Automatic Transmission Package, level 4, Dipstick & Tube, Cooler Lines, Cooler, ATF Fluid, SST89-0 Racing Billet Stall Converter, Kit

SKU: FTITH400-4K21

Automatic Transmissions

FTI Performance TH400 Level 4 Transmissions TH400-4K21 Automatic Transmission Package, level 4, Dipstick & Tube, Cooler Lines, Cooler, ATF Fluid, SST89-0 Racing Billet Stall Converter, Kit

SKU: FTITH400-4K21

Automatic Transmissions
A$12,483.10
IN STOCK! Est Ship 4-7 days. In stock at 1 location (6 available)

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Description

Note Regarding Core Charges and Exchange Programs

The advertised price on StreetFX already includes any applicable core charges. Despite some manufacturer notes that may suggest otherwise, there are no surprise charges. If you choose to return your core, you may be eligible for a partial refund of up to $489.97 AUD, minus logistics, inspection, and other incidental fees. For further clarification or assistance, please contact a StreetFX representative.


Data: v2 - Desc: v4.2 - Upd: 2026-11-08 01:28:12

Data: v4.2 - Upd: 2026-11-08 07:16:35

Features

Important Note Regarding Oils, Additives, Aerosols & Liquids

This listing may contain a product with transport restrictions. Items containing oils, additives, aerosols, adhesive or other liquid/chemical-based products may be subject to shipping restrictions depending on their current warehouse location, carrier requirements, and applicable transport regulations.

Some liquid and aerosol products are restricted for air freight or certain road freight routes and may require alternative transport methods or dispatch from a specific warehouse. While the majority of these items ship without issue, these factors can occasionally affect available shipping options or delivery timeframes.

If you are working to a tight deadline, require urgent delivery, or are unsure whether a product can be shipped to your location, we recommend contacting the StreetFX team prior to placing your order so we can confirm availability and the most suitable freight option.

(keyword: fluid)

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Fti Performance
StreetFX SKU ftiTH400-4K21
SFX Item ID 5031081
Accounting SKU fti-TH400-4K21
Manufacturer SKU TH400-4K21
Manufacturer UPC 887753824790
Alternative References FTI-TH400-4K21, TH400-4K21

Automatic Transmission Package, TH400 level 4, Dipstick & Tube, Cooler Lines, Cooler, FTI ATF Fluid, SST89-0 Racing Billet Stall Converter, Kit

FTI Performance TH400 Level 4 transmissions feature a full manual valve body equipped with a transbrake for the ultimate drag racer. They make an excellent choice for weekend bracket racers, high-powered street cars, and mud trucks. The transmissions have: a 34-element intermediate sprag, performance clutches and steels, high-flow pump, race-prepped stock case, deep aluminum pan, billet forward clutch hub, heavy-duty intermediate retainer, and a 4-clutch intermediate pack. Some models are compatible with Ultra Bell bellhousings.

Product Attributes
BrandFTI Performance
Manufacturer's Part NumberTH400-4K21
Part TypeAutomatic Transmissions
Product LineFTI Performance TH400 Level 4 Transmissions
UPC887753824790
Number of Gears3
Bellhousing Bolt Pattern ManufacturerChevy
Transmission Shift PatternReverse
Valve Body StyleFull manual
Transmission Advertised Horsepower Rating900
Torque Converter IncludedYes
Flexplate IncludedNo
Transmission Controller IncludedNo
Wiring Harness IncludedNo
Transmission Cooler IncludedYes
Advertised Flash Stall Rating3,400-3,800 rpm
Trans-Brake IncludedYes
Lockup CompatibleNo
Transmission Pan StyleDeep
Transmission Pan MaterialAluminum
Transmission Pan FinishNatural
Yoke StyleSlip-on/bolt-on
Input Spline Quantity30
Input Shaft MaterialHardened steel
Input Shaft StyleTH350/400
First Gear Ratio (Automatic Transmissions)2.43
Clutch HubBillet Steel
Transmission Case StyleOEM
Transmission Case MaterialAluminum
Transmission Case FinishBlack
Transmission Shield Built InNo
Flexplate Shield Built InNo
Fluid Fill LocationCase
Transmission Fluid IncludedYes
Transmission Fluid Quantity Included12 qt.
Dipstick IncludedYes
SFI RatingSFI 4.1/ 30.1
RemanufacturedYes
QuantitySold as a kit.
NotesThis kit includes a 3400-3800 stall billet torque converter equipped with a mech. diode and balloon plate. The kit also includes FTI's 3gal RacerPak of performance ATF and a locking dipstick & tube. Kit also includes a complete cooler kit that includes the cooler, 15ft of line, hose ends, and fittings.

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