Adding horsepower is only one part of building a serious performance vehicle.

The additional torque eventually has to make its way through the transmission, torque converter, and drivetrain before it reaches the wheels. As power levels increase, those components face loads that can go well beyond what they experience in a stock application.

That is where Pure Drivetrain comes into the picture.

Pure Drivetrain Solutions develops performance transmission components designed for enthusiasts and builders pushing modern automatic transmissions beyond their original operating conditions. The XPH catalog includes billet race torque converters, transmission hard-parts kits, and transmission components covering a range of ZF 8HP platforms.

Rather than treating the drivetrain as an afterthought, Pure Drivetrain products are designed to address the components responsible for transferring the engine's output to the wheels.

The Transmission Becomes More Important as Power Increases

A factory transmission can perform extremely well in a stock vehicle.

But increasing engine output changes the equation.

More horsepower generally comes with more torque, higher load during acceleration, and greater stress during gear changes and launches. A vehicle that has been modified with increased boost, upgraded turbochargers, or aggressive engine calibration can place substantially greater demands on the automatic transmission.

At that point, drivetrain upgrades can become just as important as engine modifications.

Pure Drivetrain's product range is centered around exactly this area, with solutions for transmission internals, torque converters, and transmission fluid management.

Billet Race Torque Converters

One of the core products in the Pure Drivetrain lineup is its range of billet race torque converters.

These are available for numerous ZF 8HP transmissions, including 8HP45, 8HP50, 8HP51, 8HP55, 8HP70, 8HP76, 8HP80, and 8HP95 applications. Both AWD and RWD configurations are represented across the catalog.

The converters are built around performance-oriented internal designs intended to handle substantially higher torque loads than standard components.

Why the Torque Converter Matters

The torque converter is the connection between the engine and an automatic transmission.

Its behavior influences how effectively engine torque is multiplied and transferred during acceleration.

For high-output turbocharged vehicles, this becomes particularly important during launches.

A performance-oriented converter can be configured around different stator characteristics to change the balance between torque multiplication, stall behavior, acceleration, and power transfer.

Pure Drivetrain offers multiple stator configurations, including 26/50, 26/45, 20/65, and 22/60 designs depending on the transmission and application.

This allows a converter to be selected according to the requirements of the specific drivetrain rather than treating every build the same way.

26/50 Stator Configurations

The 26/50 configuration appears across a large portion of the Pure Drivetrain lineup.

For supported applications, this configuration is designed to provide increased torque multiplication and higher stall characteristics, making it particularly relevant to vehicles where launch performance and turbocharger response are priorities.

Pure Drivetrain offers 26/50 converters for transmissions including the 8HP45, 8HP50, 8HP51, 8HP55, 8HP70, and 8HP80.

The correct configuration still depends on the transmission, drivetrain layout, engine combination, and intended use.

Different Stator Designs for Different Builds

Pure Drivetrain does not rely on a single converter specification.

The catalog also includes alternative stator configurations.

For example, the 8HP50 lineup includes both 26/50 and 26/45 configurations, while 8HP70 and 8HP80 applications include 20/65 options. The 8HP95 range also includes a 22/60 configuration.

These variations allow the converter characteristics to be matched more closely to the vehicle's power delivery and performance requirements.

Billet Construction for High-Load Applications

Pure Drivetrain's race converters use precision-machined billet construction and reinforced internal components.

The goal is to provide the strength and durability required when the transmission is subjected to significantly higher torque than a factory vehicle.

The 8HP70 26/50 converter, for example, uses billet construction for the turbine, stator, and cover, along with an upgraded lockup clutch system.

This type of construction is intended for high-output applications where maintaining reliable power transfer is critical.

Improving Launch Performance

Launch performance is one of the areas where torque-converter selection can have a noticeable effect.

A properly matched converter can help a turbocharged engine reach its effective operating range more quickly while providing greater torque multiplication during initial acceleration.

That is particularly relevant to:

• drag racing
• roll racing
• high-power street cars
• AWD performance builds
• turbocharged vehicles
• motorsport applications

Pure Drivetrain specifically positions its race converters for high-horsepower builds and competitive applications where launch and power transfer are important.

Transmission Hard Parts

Torque converters are only one part of the equation.

Pure Drivetrain also offers transmission hard-parts kits designed to reinforce the internal components of ZF 8HP transmissions.

The XPH catalog includes Stage 1 kits for applications such as the 8HP50 AWD, 8HP75 RWD, and 8HP90 RWD.

These kits address the transmission itself rather than simply the connection between the engine and transmission.

Reinforcing Transmission Internals

The Stage 1 hard-parts kits include upgraded internal components such as friction plates, steels, pistons, and other transmission hardware.

These components are intended to improve clutch durability, reduce wear and slippage, and provide more consistent power transfer under increased load.

For a moderately modified street vehicle, this can provide a way to reinforce the transmission without immediately moving to a full competition-level build.

8HP50 Applications

The ZF 8HP50 is a common transmission in modern performance vehicles, making it an important platform within the Pure Drivetrain lineup.

Pure Drivetrain offers both AWD Stage 1 transmission hard-parts kits and performance torque converters for the 8HP50.

The converter range includes different stator configurations, while the Stage 1 hard-parts kit is designed to reinforce the transmission for vehicles experiencing increased torque loads.

This makes the 8HP50 a good example of how Pure Drivetrain approaches the drivetrain as a complete system rather than focusing on a single component.

8HP70 and 8HP80 Performance Upgrades

Larger ZF transmissions are also represented in the lineup.

Pure Drivetrain offers multiple torque-converter configurations for the 8HP70, including 26/50 and 20/65 options for supported AWD applications.

The catalog also includes 8HP80 converters for both RWD and AWD configurations, with different stator designs available depending on the application.

This broad transmission coverage makes Pure Drivetrain relevant to a wide range of high-output builds.

RWD and AWD Configurations

Drivetrain layout is an important consideration when selecting transmission components.

Pure Drivetrain's catalog includes converters specifically developed for both rear-wheel-drive and all-wheel-drive configurations.

Examples include:

• 8HP50 AWD
• 8HP51 AWD
• 8HP55 AWD
• 8HP70 AWD
• 8HP80 RWD
• 8HP80 AWD
• 8HP95 AWD

The exact converter specification must be matched to the transmission and vehicle configuration.

Transmission Fluid Management

Performance is not only about internal strength.

Heat and fluid management are also important for automatic transmissions, particularly when vehicles are subjected to repeated high-load operation.

Pure Drivetrain offers transmission pan upgrades designed to improve fluid management and cooling while providing a durable replacement for the factory pan.

The XPH catalog currently includes an 8HP50 RWD transmission pan designed around improved fluid management and cooling for high-demand applications.

From Street Builds to Motorsport

Pure Drivetrain products can be used across different levels of modification.

A street-focused build may benefit from reinforced transmission internals or improved transmission hardware as engine torque increases.

A more aggressive setup may require a performance torque converter capable of handling increased power and providing the desired launch characteristics.

At the highest levels, converters, transmission hard parts, fluid management, and transmission calibration can all become part of a broader drivetrain strategy.

Matching the Drivetrain to the Engine

A common mistake when modifying a performance vehicle is to focus exclusively on engine output.

A turbocharger upgrade, ECU calibration, intake system, exhaust, and fuel system can dramatically increase engine performance.

But the transmission still has to transfer that output.

A drivetrain upgrade should therefore be considered alongside the vehicle's:

• engine and turbocharger combination
• expected horsepower and torque
• transmission model
• AWD or RWD configuration
• intended use
• launch strategy
• transmission calibration
• cooling requirements

Selecting the correct Pure Drivetrain component starts with identifying these factors.

Built for the Next Stage of the Build

Pure Drivetrain is particularly relevant to enthusiasts who have moved beyond basic bolt-on modifications.

Once a vehicle begins producing substantially more torque than stock, transmission reliability and power transfer become increasingly important.

A properly selected torque converter or transmission hard-parts upgrade can help create a drivetrain capable of supporting the engine modifications already installed.

The objective is not simply to make the transmission stronger.

It is to build a drivetrain that can reliably deliver the engine's power to the wheels.

Explore Pure Drivetrain at XPH

Pure Drivetrain brings together performance-focused solutions for some of the most widely used ZF 8HP transmissions.

From billet race torque converters and multiple stator configurations to Stage 1 transmission hard-parts kits and transmission pans, the lineup gives high-output street cars, drag builds, and motorsport vehicles options for strengthening the power-transfer system.

If your engine has already been upgraded, the next limitation may not be under the hood.

It may be between the engine and the wheels.

Explore Pure Drivetrain at Extreme Power House: https://x-ph.com/pure-drivetrain/