DEVELOPMENT AND TESTING: HJS HD 200 cell catalytic converters increase power and turbo sound but the volume is still rather reserved due to the restrictive factory rear exhaust. We set out to craft a rear exhaust that was simple, light, and as aggressive as possible while retaining drivability. The 991.2 non-PSE equipped cars are prone to droning in the 1,800-2,200 RPM range with aftermarket exhausts – the primary factor that we based our system around. We tested numerous variants incorporating resonators, helmholtz resonators / anti-drone tubes, straight pipes, and a basic x-pipe to hone in on the best possible solution. Resonators reduced the overall engine tone and volume and did not have enough of an impact on the drone. Helmholtz resonators (also known as anti-drone tubes) are an effective way to reduce undesirable frequencies when engineered and utilized correctly. Our final design has proven to offer the very best results on this application and achieved our high standards for sound quality and drivability. You’ll be please with the aggressive yet civil nature of this exhaust and enjoy every minute behind the wheel!
HJS HD 200 CELL CATALYSTS: The highest quality catalytic converters available, known for their industry leading flow and durability. They are efficient enough to meet strict EURO 4 emission standards while still allowing for an increase in flow – all without a check engine light. The HD design uses premium triple foil winding for maximum strength. The brazing stripe is an extra feature in the interest of durability – it prevents the core from moving or experiencing any damage from sustained high horsepower abuse. We use a large and appropriately sized catalyst to allow for maximum gains – no compromises here!
CONSTRUCTION: Each component is assembled in house out of mandrel bent, thick wall .065″” T304L stainless steel, then rigorously quality checked in-house. Back purged TIG welding ensures proper weld penetration and longevity.
BOLT ON AND GO: Each product is tested in a fixture to ensure perfect fitment then foam packed to ensure it arrives in perfect condition.
LIFETIME WARRANTY: Enjoy your SOUL exhaust components with confidence on both the street and track as they are covered for life! Our team will quickly work with you to resolve any issues or answer any questions that you may have. We cover our HJS catalytic converters with an unprecedented 3 year warranty while the components themselves are backed by our Lifetime Warranty.