Built to Win a Championship: David’s GT2 Miata Takes 1st Overall at Autobahn

Winning a season championship is different than winning a race. It demands consistency, reliability, and a car that performs the same way every time it goes on track.

At Autobahn Country Club, GT2 is one of the fastest and most serious classes on the schedule. The class runs a 7:1 power-to-weight ratio, allows non-DOT slick tires as standard, and permits full aerodynamic packages with no penalty, creating a field packed with high-downforce, high-power cars. Cayman GT4 Clubsports, BMW M2 and M4 race cars are regular competitors, and drivers can earn points back for running a true manual transmission instead of a sequential. Over the course of the 2025 season, David’s K-swapped Miata competed under those rules and finished 1st overall in GT2 for the season, proving that smart engineering and reliability can win against significantly heavier and more powerful machinery.

A Championship-Focused K-Swap Build

The K-swap in David’s Miata was built with one goal in mind: survive an entire season while remaining competitive at the sharp end of the field.

The setup is intentionally a hybrid, combining elements of K24A and K24Z packages with a custom turbo system tailored for GT2 rules and power targets. On paper, the car is capable of 420 whp on wastegate, but for the sake of consistency and longevity it was detuned to 377 whp for competition. At a minimum class weight of 2,450 lbs with driver, that power level places the car squarely in the heart of GT2 while maintaining a reliability margin that matters over a full season.

Paired with a Haltech Elite 1500 ECU and KPower drive-by-wire components, the car benefits from traction control, no-lift upshifts, and automatic throttle blip on downshifts. In a turbocharged GT2 car running slicks and full aero, those features reduce driveline shock, stabilize the car under braking, and make power delivery manageable in traffic and in the draft.

GT2 races at Autobahn typically run around 35 minutes, often in high ambient temperatures. Even under those conditions, with sustained boost and long stints tucked into the draft, coolant temperatures consistently stayed around 190°F. After implementing targeted reliability upgrades during the 2024 offseason, the car completed the entire 2025 season with zero drivetrain-related failures. For a turbocharged car competing in longer sprint races, that level of durability is not accidental.

This is exactly the kind of real-world use case KPower designs for. Not theoretical builds. Not catalog checklists. Cars that need to perform under pressure, lap after lap, for months at a time. Every component choice was made to support drivability, thermal control, packaging, and serviceability across a full season of competition.

Key Components in the Winning GT2 Miata

Below is a breakdown of the major components in David’s GT2 Miata. Every item listed is either a KPower product or available directly through KPower.

Drivetrain and Swap Foundation

• KPower K24 Swap Package

• K to ZF 5-speed Transmission Kit

• V8R Getrag Stage 2 Differential Kit

• OS Giken LSD for G80 Differential

Induction and Fuel

• KPower Intake Manifold

• KPower DBW Throttle Body Adapter

• KPower Fuel Rail

Electronics and Control

• KPower Haltech Electronics Package for NA/NB

• Haltech Elite 1500 ECU

• KPower DBW Conversion for Honda Fit Pedal

• Haltech CAN Wideband Sensor and Controller

Turbo System

• K24Z Billet Turbo Manifold

• Garrett G25-660 Turbo with Internal Wastegate

Engine Systems and Reliability

• KPower Timing Tensioner Cover with -10 AN Oil Return

• KPower K24A Hybrid Timing Chain Cover

• KPower Timing Cover Oil Baffle

• K20 Oil Pump Conversion for K24Z3

These are not show parts. They are parts chosen because they work together, fit correctly, and hold up to repeated abuse over a long season.

Championships Are Won on Reliability

This GT2 season championship reinforces what KPower builds toward every day. When K-swap components and complete kits are engineered to integrate properly and survive real track use, drivers can focus on consistency instead of repairs.

Winning GT2 over a full season against cars with significantly more factory backing and displacement is proof that thoughtful engineering and execution still matter.

Congrats to David on a hard-earned GT2 championship at Autobahn. This is exactly what these parts were built for.