After my mechanic put an UDP and waterpump with the metal impeller on my SVT this morning, he said I should get a set of phenolic spacers. He said one of his friends put them on his ricer and gained 15-20 horsepower. I know anything you can do to get cold air into the engine will help but I never heard of these before. What are they and where can I get them. I have a 2000 SVT. Thanks
