850 exhaust question

code-man850 · Post by **code-man850** » 17 Feb 2009, 15:04

I'm looking at buying an OBX turbo back exhaust for my 855. By looking at the picture of it, it doesn't seen to have a cattalytic converter on it. Correct me if i'm wrong. And if it doesn't have one is it easy to plug one in if I bought one and took it to the guy that will be installing the exhaust?

Post by **MadeInJapan** » 17 Feb 2009, 17:33

I'm not sure of your answer, but since you live in California, the fairly cheap CATS are now out as Calif. just upped their laws and restrictions- make sure and check out what you can even buy and put in your car now. I believe it's even against the law to sell and ship a CAT to Calif that was acceptable a month or so ago (from what I've read). Good luck and post back your experience and what you end up doing.

code-man850 · Post by **code-man850** » 18 Feb 2009, 08:39

Wow. Thanks a lot. The "newly approved by California" catalytic converters are selling for around $220. Doesn't make the exhaust such a deal anymore. Here's a pic of the exhaust.

csbrianp · Post by **csbrianp** » 11 Aug 2009, 22:09

I saved myself a bunch of money by building a cat back exhaust using a local muffler shop for my 96 850R. I purchased a Turbo Muffler from Pep Boys for about $20, and had the muffler shop cut the stock muffer out and welded in a 2 1/2" pipe out the back.

2 things happened, My car immediately became a terrible car to drive. No get up and go. The other was the noise, I know that's why you add a performance exhaust but it became too loud. My wife won't drive it any more. My son says it sounds cool when idling, but even he doesn't like the droan at freeway speeds.

I fixed the drive ability by advancing the exhaust cam 2 degrees.

So, when you read about guys putting 3" exhaust on their 850 turbos it might make more power in the higher rpms but I guarantee it will be as slow as a non turbo in daily driving.

Bian

FCPEURO · Post by **FCPEURO** » 12 Aug 2009, 08:40

I was thinking of getting a full exhaust done on my 850 T-5. But after reading this, I am having second thoughts. Would a cat back exhaust do this? Would it be worth running a cat back or should I stay with the stock exhaust?

Post by **matthew1** » 12 Aug 2009, 14:20

Many have done cat-back exhausts... the trick is to buy what's worked for everyone (IPD exhaust kit, for instance).

If the setup gets too free-flowing like csbrianp's you need to mess with your cams's timing because the stock engine depends on a stock amount of backpressure to work right.

I don't know how the kits get around this, or if they just go right up to the point where you need to adjust timing.

FCPEURO · Post by **FCPEURO** » 13 Aug 2009, 07:29

I am thinking they must just bring it right to the edge before the timing needs to be advanced. So getting at least a cat-back is worth it.

9394volvo850s · Post by **9394volvo850s** » 17 Dec 2009, 16:12

weired that you all seem to have not so good out comes with cat backs. maybe its because making the exhaust bigger after the cat where the exhaust starts to cool and condense dosent make sense. hense why OBX goes from a 3" downpipe to 2.5. not from 2.25 stock to 2.5. cant make power with the huge factory cat.

walter leever · Post by **walter leever** » 23 Dec 2009, 12:18

Go for a complete Ferrita system,bit expensive,but is an inox(ss)system,so never have to replace it.

Will give about 10 horses(system)and turbo spooling up much easier

walter

9394volvo850s · Post by **9394volvo850s** » 27 Dec 2009, 17:44

OBX is stainless steel. and $415 shipped. best bang bor the buck period. just no cat, not a problem in my area.