Also

People buy for 7 reasons;

make money
save money
save time
save effort
eliminate pain
better health
Increase pleasure

what are you appealing to?

You ain't selling turbos.
You're selling explosive acceleration.
The opportunity to gloat over rival drivers
One upmanship.
etc, etc

And in your copy all you do is talk about YOU.
You need to stand in the shoes of your typical buyer.
And talk about ME. Not that I'm a turbohead....

cheers mark