GT

Why We Choose HJS Catalytic Converters:  HJS German imported catalytic converters are made from some of the highest grade materials you can find in a catalytic converter. This yields high performance gains and longevity so it wont deteriorate over...

Replace the restrictive OEM McLaren 7GT 650-cell catalytic converters with much less restrictive straight-through pipes for maximum flow and maximum Hyper-car Sportscar sound.                      ...

Achieve maximum power gains without sacrificing driveability or reliability. Maps are available for completely stock cars, or for cars equipped with Sport Cats, Cat-bypass Pipes, X-Pipe Exhausts, upgraded turbos, and more.       ...