Free ground shipping.
These kits are hand built to order. Delivery time is 6-8 weeks.
Watch the video in the images to hear them on the car.
Want one of the best Porsche 997 exhaust upgrades?
Upgrade your 997.1 Carrera with HJS catalytic converters for an aggressive exhaust note and more power without a check engine light.
Pair these catalytic converters with a SOUL valved exhaust system Click here
+ Fits all Porsche 997.1 Carreras (2005-2008) – note different part numbers between non-PSE and PSE exhaust equipped cars
+ Peak power gains of 10 whp and 14 ft-lbs of torque
+ Weighs 2 lbs / .9 kg less than factory exhaust components (15 lbs vs 13 lbs)
+ Designed and built in-house at SOUL's Willow Grove, PA facility
+ All Soul Performance components are backed by a lifetime warranty
DEVELOPMENT: The factory 997.1 Carrera catalytic converters are quite restrictive and upgrading them is a common modification.
SOUL took a fresh look at the exhaust design to try and create the best possible solution.
Side by side sound comparisons with our split bank design and an X-pipe design revealed that an x-pipe lowers yields a hollower exhaust tone and cuts out desirable deeper frequencies on the 997.1 – the difference is very noticeable.
Separating the banks adds more volume and more character, a deeper and fuller flat six sound with a hint of rasp, and an almost air cooled inspired exhaust note.
Verified independent dyno testing at Growler Motor Labs revealed real, repeatable peak gains of 10 whp and 14 ft-lbs of torque with a noticeable improvement in the mid RPM range.
Throttle response and overall drivability is increased. Fall in love with your Carrera all over again with great gains in sound and power!
HJS 200 CELL CATALYSTS: SOUL uses the highest quality catalytic converters available, known for their industry–leading flow and durability.
They are efficient enough to meet strict EURO 3 emission standards while still allowing for an increase in flow while greatly reducing the changes of getting a check engine light.
The HJS HF design uses premium double foil winding for exceptional strength and durability.
CONSTRUCTION: Each set is assembled out of thick-wall .065″ T304L stainless steel and rigorously quality checked in-house. Smooth mandrel bends and thick flanges ensure product longevity.
Each set of catalytic converter pipes is tested in a fixture to ensure perfect fitment and then foam packed to ensure they arrive in perfect condition.
New hardware is included for the cats to header flanges.
w/o sport exhaust SKU: POR.9971.SCC
with sport exhaust SKU: POR.9971PSE.SCC
The best catalytic converters for Porsche 997 at MGC.