TREMEC Magnum XL 6-Speed Transmission Kit – TUKT12019 (Close Ratio, 0.50 6th Gear)

The Ultimate 6-Speed Upgrade for 2005-18 Mustangs

Transform your driving experience with the TREMEC Magnum XL Kit (TUKT12019)—a complete, high-performance 6-speed transmission solution designed specifically for 2005 - 2018 S197 Ford Mustangs. Built for enthusiasts who demand strength, precision, and smooth high-RPM shifting, this close-ratio kit delivers race-bred performance with street-friendly refinement.
Introduced in 2012 as a continuation of the acclaimed TREMEC Magnum series, the Magnum XL retains the original’s brute torque capacity, precision shifting, and legendary durability—while offering key refinements tailored to modern applications.

What’s Included in the TUKT12019 Kit:

• TREMEC Magnum XL Close-Ratio Transmission
• SFI-Approved Steel Bellhousing
• Transmission Crossmember
• Transmission Mount
• Isolated Short-Throw Shifter
• Shift Ball (Black)
• Utilizes OEM Hydraulic Clutch Release System

Close-Ratio Gear Set:

• 1st: 2.66
• 2nd: 1.78
• 3rd: 1.30
• 4th: 1.00
• 5th: 0.74
• 6th: 0.50 (Deep Overdrive for Highway Cruising)
• Reverse: 2.90

Built for Performance – Refined for the Street

The Magnum XL features a long-tail housing that eliminates the semi-remote shifter setup found in late-model Mustangs. The result is a crisp, direct feel with every shift—no slop, no delay. Whether you're ripping through gears at the track or cruising comfortably at 2,000 RPM on the freeway, the Magnum XL is engineered to deliver the best of both worlds.

The included components in the TUKT12019 kit simplify installation, making this the perfect upgrade for Mustang owners looking to replace their stock 5-speed or factory TR-3650/TR-6060 with a serious performance transmission.

Take Full Control of Your Mustang

The TREMEC Magnum XL TUKT12019 Kit gives your 2005-2018 Mustang a true performance edge—designed to handle big power, aggressive driving, and spirited street use with ease.

Ideal for:

• 2005–2018 Ford Mustang GT (S197)
• High-horsepower street cars
• Track-day builds
• Manual transmission upgrades

 

This Product Ships Freight

When you add this product to your cart and go to purchase, you'll get this message: "Your order will be shipped via pallet. An estimate will be provided to you and added to your bill once approved.". If you continue through the purchase process, an order will be sent to SST, but your payment will not be collected. Upon receiving your order, SST will email you an estimate to ship to your address. At that point, you can decide to finalize the purchase, or you can choose to decline.