Soarin Posted March 13, 2016 Share Posted March 13, 2016 I'm posting a third new topic because the exhaust forum doesn't get any attention amd this seemed like a good place. I like the Invidia divorced downpipe. Should I go catted or non catted? Any info on fitment of either? Any advantage of one over the other? I've been reading the high flow cat is better fitting and performing for my application. The car is an 06 Legacy GT with the 5EAT. Link to comment Share on other sites More sharing options...
whitrzac Posted March 13, 2016 Share Posted March 13, 2016 Catted. No stinky car. Link to comment Share on other sites More sharing options...
BrianEarlSpilner Posted March 13, 2016 Share Posted March 13, 2016 Catted is the way to go. I've run both setups and that's what I'd go with. The performance gains from catless are negligible, the smell from catless isn't. You end up smelling like exhaust when you drive your car and opening the windows makes it worse. Some have had luck blocking the vents in the trunk to reduce the smell. So... catted Link to comment Share on other sites More sharing options...
freaksavior Posted March 13, 2016 Share Posted March 13, 2016 Catted. It cost more, but I wish I had done that over catless. I hate the smell every time I get out of the car. Link to comment Share on other sites More sharing options...
I Donated Too sigmafour Posted March 13, 2016 I Donated Too Share Posted March 13, 2016 I have both. I had an Invidia catted and then purchased a non catted Invidia version. I am putting the catted one back on because of the smell. Link to comment Share on other sites More sharing options...
Soarin Posted March 14, 2016 Author Share Posted March 14, 2016 Catted it is. Thank you for the information. Plus I want this car to pass smog every year. I never knew about the smell. Link to comment Share on other sites More sharing options...
Evnldr Posted March 14, 2016 Share Posted March 14, 2016 Mine smells now and I have stock DP Smells only when I open it up. Link to comment Share on other sites More sharing options...
Tc339 Posted March 14, 2016 Share Posted March 14, 2016 I'm running catless and would like to switch to catted. Does anyone know if there is much of a sound difference? Would the catted be any quieter? I actually quite like the smell, but wouldn't mind if my car was slightly quieter. Link to comment Share on other sites More sharing options...
viaotone Posted March 14, 2016 Share Posted March 14, 2016 I hate the smell every time I get out of the car.http://financeisok.com/3ce5.jpghttp://financeisok.com/ht11.jpg http://financeisok.com/dh.jpg Link to comment Share on other sites More sharing options...
Max Capacity Posted March 14, 2016 Share Posted March 14, 2016 I have both, the only difference is notice is the exhausts on the wagon turn black on the inside. In 5 years I have not noticed any smell other then the exhaust smell sometimes when I back into a parking spot. But that's what my 1970 340 Duster and 1970 GTO smelled like all the time. I don't have any smell when driving with the windows down. I find that smell better then the stinky sulfur smell from the cat. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
freddy31 Posted March 16, 2016 Share Posted March 16, 2016 I have uncatted and find no smell that I dislike yet. Sent from my SM-G900V using Tapatalk Link to comment Share on other sites More sharing options...
coldsoda Posted March 17, 2016 Share Posted March 17, 2016 I have both a catted DP (perrin) on my spec.b, and a catless DP on my wrx. the smell is very faint on the wrx, and only occasionally noticeable even with the windows down. I've had it that way for 7 years. technically the catless will make more power, but not by a whole lot. I dont smell anything on the spec.b's catted setup. emissions; most states only check for a check engine light to pass smog, but if you are in one of the tougher states that visually inspect, I can see the advantage of staying catted to avoid any trouble. Personally, if I had to buy another DP today I would go catless - cheaper, nothing in the pipe that will ever go bad, and the smell doesn't bother me. plus AZ doesn't do visual inspection. Link to comment Share on other sites More sharing options...
MTBwrench Posted March 17, 2016 Share Posted March 17, 2016 I have a catted COBB pipe (still have some remorse for the environment) and I still get exhaust smell all the time. But I love that smell... so I don't care MTBwrench's Stage 3 5EAT #racewagon 266awhp/255awtq @17.5psi, Tuned By Graham of Boosted Performance Everyone knows what I taste like. Link to comment Share on other sites More sharing options...
Andy_Mac Posted March 17, 2016 Share Posted March 17, 2016 Get next to no smell out of my catless one. Only ever smells like a boat for the first 30sec or so from startup. 2000 Legacy B4 RSK - SOLD 2006 Legacy BP5 GT Spec B wagon - Garage Thread 2011 VW T5 van 2.0L of turbo diesel awesomeness Link to comment Share on other sites More sharing options...
762x39 Posted March 17, 2016 Share Posted March 17, 2016 Some people speculate that a catted down pipe will help to alleviate boost creep but I don't have the expertise to make an accurate conclusion for that scenario. Personally, I own the catted version of the invidia because it was the only 5EAT pipe available when I needed one last summer. I would have bought a catless version simply to save $ and for no other reason. Being an owner of the catted invidia, I can attest that you will not give up ANY power. My stage 2 tune is well within the respected range. With a stock catback the difference in sound will also be negligible. If you put an aftermarket catback on, it will be loud no matter what. If you have ever ridin in a muscle car, then you know what uncatalyzed fuel smells like. Its no big deal. Its all up to you. Don't over think it, pick one, install it, and enjoy it! Link to comment Share on other sites More sharing options...
08 LGT Posted March 17, 2016 Share Posted March 17, 2016 In addition to the smell, catless DPs can also leave an exhaust residue on the rear bumper over time that needs to be cleaned off (or so I hear). Catted, definitely. No smell, no performance lost, better for the air. It costs more, but you don't want to smell like a lawnmower every time you get out of your car. Link to comment Share on other sites More sharing options...
Soarin Posted March 17, 2016 Author Share Posted March 17, 2016 I have one lined up and I'll be buying the catted one. Thanks to everyone with their comments. Are there any fitment or long term issues? I figure no, but wanted to ask anyways. Link to comment Share on other sites More sharing options...
I Donated Too sigmafour Posted March 17, 2016 I Donated Too Share Posted March 17, 2016 Only possible long term issue is to the cv boot. Once you remove the stock downpipe you will expose the aging rubber of the cv boot to a blast of heat it hasn't seen before and the random countdown clock to boot failure will speed up... It was going anyway just slowly. You can wrap the downpipe before you install it and you may even consider taking it to an exhaust shop and having them weld in an o2 bung and cap it so you have a place to put a wideband later. Wrap is worth doing as it will also raise the temp of the catalytic converter which will only improve its efficiency. Catless does make soot. True true but my bumpers aren't bad but the tips look pretty unkept Link to comment Share on other sites More sharing options...
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