Complex sentence: With the demise of the GM Performance Division, performance tunes like this have been relegated to the aftermarket sector, despite newer engines being more durable and tuned to slower horsepowers in numerous sport-car applications.
Split into simpler sentences: With the demise of the GM Performance Division, performance tunes like this have been relegated to the aftermarket sector. This despite newer engines being more durable, and tuned to lower horsepower levels in numerous sport-car applications.