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 time like lower grade catalytic converters. These catalytic converters flow up to 93-95% of a straight pipe in most applications. The benefit is that you get the "straight pipe sound" while still being able to provide enough emissions scrubbing to prevent a check engine light.
Replaces the restrictive factory cats with high-performance HJS Racing sport cats for maximum performance and sound
Fits all BMW E46 M3 vehicles (2000-2006)
Improves power and throttle response
Saves weight from the vehicle versus factory restrictive cats
Constructed with Fabspeed-proprietary 200-cell HJS high-flowing catalytic converters using T304L stainless steel
Direct replacement for stock cats
Simple bolt-on installation
All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty
DISCLAIMER: This product removes the OEM catalytic converters from the vehicle, and as such, is strictly intended for closed track events and off-road use only. This product contains a High-Flow Sport Catalytic Converter solely intended for track and race cars as it is NOT California Air Resources Board Certified and not EPA certified. You are hereby informed and warned to check your local, state, and federals laws before buying and installing these or any aftermarket parts to be sure whether usage is in violation. All installation-risk and use-risk is borne by the end-user and installer of these parts.
The install on the header side was flawless. Mating it to my section 2 was not so smooth as they didn't sit flat against each other so some massaging (heat and bending of my section 2) was needed. Parts (flanges, nuts) were high quality.With a dyno tune, I was able to get good gains at the top of the RPM range (>5krpm). Sound is deep on low rpms under load and slowly goes up in pitch as you climb in engine speed. It's got a nice character that's mature, but stronger than stock. I'm using a fabspeed header, sport cats, status gruppe resonated section 2 and OEM muffler.
After endless search for the perfect exhaust note for my E46, I have found it! I spent hours watching videos on YouTube videos trying to find the perfect sound, but they were all plagued with an annoying "raspiness" that seems to be common on any E46 M3 with an exhaust. I was referred to Fabspeed by a friend, and I have to say these sport cats along with Fabspeed's headers is one of the best sounds I have ever heard for an E46 M3! Super crisp, deep exhaust note, with no more rasp than the factory setup. Certainly louder, and the car also pulls a bit harder now with less restrictions. Nick was a pleasure to work with, easy to communicate with, and understood my wants and needs to a T. Would recommend this system to anybody with an E46 M3!