spdracerut

In Cali, they can be extremely strict on visual inspection. I almost didn't get passed because of an oil catch can even though my car was otherwise completely stock. I would note a fully enclosed system, not vented, so actually improved the stock system. Stock exhaust, cat, headers, etc. Another friend of mine had a CARB legal intake and the smog guy made them dig up the paper work for it even though it had the CARB sticker on it.

VektorPerformance

I see the HJS cats are very popular in Porsche circles, and have always been a bit curious as to why. Does it meet sniffer emissions requirements, not stink like some cheapo units, very reliable, flow super swell, etc...?

I am mostly familiar with CARB testing criteria, so I'm not the guy to ask when it comes to how much of which gasses are allowed. I was more interested in how they stack up compared to OEM in regards to emissions capabilities. There is a percentage window that is allowable to meet certification. As far as I know most cats that can meet this emissions compliant capability boldly state that in the title and description. That being said, I have come across some very high end performance cats that have passes emissions testing (beyond visual) on some pretty modified cars.

Soul Performance

Premium quality, they do a great job at minimizing or preventing check engine lights, you could say they do smell less a result of less noxious fumes getting through the exhaust, and given the build for durability and functionality - flow quite well.

The HJS HD 200 cell units have a few features which are beneficial under high performance applications.

- The HD design uses premium triple foil winding for maximum structural integrity



- The brazing stripe (indent around the outside of the catalytic converter) is an extra feature in the interest of durability – it prevents the core from moving or experiencing any damage from sustained high horsepower abuse / pulses in the exhaust.


- They are directional for increased efficiency and effectiveness

According to HJS, they meet EURO 4 emissions at minimum:

"Euro 4 (EC2005)
January 2005 (January 2006)

Euro 4 (January 2005) and the later Euro 5 (September 2009) concentrated on cleaning up emissions from diesel cars, especially reducing particulate matter(PM) and oxides of nitrogen (NOx).

Some Euro 4 diesel cars were fitted with particulate filters.
Euro 4 emission limits (petrol)
CO – 1.0 g/km
HC – 0.10 g/km
NOx – 0.08
PM – no limit
Euro 4 emission limits (diesel)
CO – 0.50 g/km
HC+ NOx – 0.30 g/km
NOx – 0.25 g/km
PM – 0.025 g/km"[/SPOILER]

Source

-Mike

worf928

Soul Performance

Chris, I might add to Mike's insight on HJS above. In all the years I've been selling exhaust components I have never had an HJS cat not pass a sniffer test, with two exceptions. One exception was a fellow who ended up having a separate issue with the car causing it to run very rich, which regardless of the cat cores would have put the sniffer readings outside of spec. A tune up resolved that. The second was a fellow who I found out had been consistently running leaded race fuel, which essentially stripped the cats. I switched him to catless headers.

Bob Z.

I finally had my Soul high flow cats installed today, at Pulse Racing Services in Jacksonville FL. If anyone is looking for a Indy Porsche Shop in N.FL check them out; Terry the owner has a lot of experience racing, wrenching and tuning. Anyway, I knew I would like them since I test drove a car with them before I ordered and I was not disappointed since the ride home was better than the ride up! Not too loud but much better than with the PSE on and I cannot open her up yet since I have just over 300 miles on her but I know the best is yet to come.