On my first visit to Siriani, I had a concern about a possible blockage in a catalytic converter for a 1997 Toyota Camry. I got to meet with both Louis and Louie, they checked out my vehicle and then we did a test drive. The result: no catalytic converter blockage but the hesitation/lack of power was due to an engine timing issue. These guys were incredibly thorough, efficient, and explained their findings in a straight forward way. They are honest, knowledgeable and very fair in their pricing. Simply outstanding!