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SKU: SRLS40086-3 Â | Â UPC: 674866108448
FTI Performance 9.5" Billet Triple Disc Lock-Up Street Racer Series Torque Converter – LS Engine, 3600 Stall (4L80E/4L85E)
The FTI Performance is a 9.5" billet triple disc lock-up torque converter from the Street Racer Series, built specifically for LS-powered vehicles with 4L80E or 4L85E transmissions. Featuring a CNC-machined billet front cover and billet lock-up piston, this converter virtually eliminates premature clutch wear while delivering strong street and strip performance. With a 3600 stall speed, custom stator design, and multiple blade angle options, it provides excellent launch characteristics and efficient power transfer. The furnace-brazed and heli-welded fins, severe-duty sprague, and anti-ballooning flanged impeller hub make this torque converter extremely durable and capable of handling high-horsepower applications.
Key Features
- Billet Triple Disc Lock-Up – CNC-machined billet front cover and piston for maximum durability and reduced clutch wear
- 3600 Stall Speed – Optimized for LS engines and aggressive street/strip performance
- High-Flow Design – Custom stator and multiple blade angle pumps for excellent torque multiplication
- Severe-Duty Construction – Furnace-brazed fins, heli-welded assembly, severe-duty sprague, and anti-ballooning flanged hub
- 35-Spline Input – Compatible with 4L80E/4L85E transmissions
| Spec | Detail |
|---|---|
| Part Number | SRLS40086-3 |
| Brand | FTI Performance |
| Type | 9.5" Billet Triple Disc Lock-Up Street Racer Series Torque Converter |
| Application | LS Engine with 4L80E/4L85E Transmission |
| Stall Speed | 3600 RPM |
| Outside Diameter | 9.500 inches |
| Pilot Diameter | 1.703 inches |
| Spline Count | 35 |
| Lock-Up | Yes |
| Torque Converter Use | Street/Strip |
| Country of Origin | United States |
Whats Included
- FTI SRLS40086-3 Billet Triple Disc Lock-Up Torque Converter
- Mounting hardware
Product Notes
- Custom-built for LS engines with 4L80E/4L85E transmissions
- Triple disc lock-up design greatly reduces clutch wear and improves lock-up performance
- Actual stall speed may vary based on engine combination, gear selection, and vehicle weight
- Professional installation and transmission tuning recommended
Installation Notes
- Requires professional installation and proper transmission setup
- Estimated time: 4–8 hours (depending on transmission removal and reinstallation)
- Compatible with stock or aftermarket flexplates (verify bolt circle)
Why Choose FTI Performance Torque Converters?
- Billet construction and triple disc lock-up for unmatched durability
- Custom-built to your exact stall and driving style
- Proven in street, strip, and high-horsepower applications
Frequently Asked Questions
-
Q: What stall speed is this converter?
A: 3600 stall – ideal for street/strip LS engines with 4L80E/4L85E transmissions. -
Q: Does it include a lock-up clutch?
A: Yes, it features a billet triple disc lock-up design for strong lock-up performance and reduced wear. -
Q: Will actual stall speed match the rated 3600 RPM?
A: Actual stall may vary depending on engine combination, gearing, and vehicle weight. FTI can custom-build to your exact needs.
Shipping & Handling
- Method: Ground UPS or FedEx (oversize shipping may apply)
- Availability: In stock – ships same or next business day
- Packaging: Secure FTI Performance retail packaging
FTI Performance
FTI Performance parts and accessories are stocked at Black Ops Auto Works for enthusiasts, racers and service focused builds. FTI Performance torque converters, automatic transmissions, valve bodies, transmission internals and fluid support American V8 street, strip and truck builds. The range covers GM 4L60E, 4L80E and TH400, Ford 4R70 and AODE, Mopar NAG1 and modern 8 speed applications. Every product is filterable by year, make, model, trim, engine and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 61 FTI Performance SKUs across vehicle specific, universal, replacement, performance and service applications. What This FTI Performance Collection Covers FTI Performance torque converters, automatic transmissions, valve bodies, transmission internals and fluid support American V8 street, strip and truck builds. The range covers GM 4L60E, 4L80E and TH400, Ford 4R70 and AODE, Mopar NAG1 and modern 8 speed applications. Torque converters Torque conv...
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