T1 4.1L Extreme Duty Stroker Kit | Nissan GT-R R35 VR38

The T1 4.1L Extreme Duty Stroker Kit is engineered for extreme Nissan GT-R R35 builds pushing well beyond the limits of factory displacement and rotating assembly strength. Designed and proven by GT1R, this stroker kit increases displacement to 4.1 liters, delivering massive torque gains, improved spool characteristics, and the durability required for serious high-boost applications.

At the core of the kit is a 94.4mm billet crankshaft, paired with GT1R-spec Diamond pistons, Manley 300M Tri-Beam connecting rods, and TP1 DLC-coated wrist pins for maximum strength and reduced friction under extreme cylinder pressures. The rotating assembly is fully balanced and the rods come retanged for proper crank compatibility, ensuring reliability at high RPM and power levels.

To complete the package, T1 includes custom rod and main bearings, along with a T1-spec custom ATI harmonic damper, providing superior vibration control and long-term engine stability. This stroker kit is capable of supporting 1,500+ wheel horsepower when paired with the proper fuel system, turbo setup, and professional engine assembly.

This is a true no-compromise bottom-end solution for GT-R owners building competition-level street cars, roll racers, drag builds, or high-power track applications.

Key Features and Benefits:

• Increases displacement to 4.1L for massive torque and power gains

• Rated for 1,500+ WHP applications

• 94.4mm billet crankshaft with key

• GT1R-spec Diamond forged pistons

• Manley 300M Tri-Beam connecting rods

• TP1 DLC-coated wrist pins for reduced friction

• Custom rod and main bearings included

• T1-spec ATI harmonic damper

• Rotating assembly fully balanced

• Built for extreme boost and race-level abuse

Technical Specs / Material Info:

• Engine Platform: VR38DETT

• Displacement: 4.1L

• Crankshaft: 94.4mm billet

• Rod Material: Manley 300M steel

• Piston Type: Forged Diamond pistons

• Wrist Pins: DLC coated

• Power Capability: 1500+ WHP

• Balance: Fully balanced rotating assembly

Package Contents:

This T1 4.1L Extreme Duty Stroker Kit includes:

• 94.4mm Billet Crankshaft (with key)

• Forged Pistons

• Forged Connecting Rods

• DLC-Coated Wrist Pins

• Custom Rod Bearings

• Main Bearings

• T1-Spec ATI Harmonic Damper

• All required hardware for assembly

Installation Info:

• Requires full engine disassembly

• Professional engine builder strongly recommended

• Proper tuning required after installation

• Intended for high-horsepower builds only

Special Notes:

• Designed for GT-R R35 / VR38DETT engines

• Ideal for drag racing, roll racing, and extreme street builds

• Supporting mods required (fuel system, turbos, cooling, tuning)