Cobalt60 Posted August 26, 2010 Report Share Posted August 26, 2010 I have received a 3" Mookeeh cat-back exhaust. I brought it to an exhaust place and they suggested it would be easier to get a new 3" cat, and adapt that to the stock down pipe, than it would be to adapt the 3" cat-back to the stock cat. So, I have started shopping for high flow 3" cats. Most of the ones I have come across are ceramic core, but I have seen it suggested that a metallic core is better suited to "high-temp" and "high performance" turbo applications. So, should I really try to get a metallic core unit, or should a ceramic core be fine? Thanks -Chris P Link to comment Share on other sites More sharing options...
Guest Posted August 26, 2010 Report Share Posted August 26, 2010 So you got a Mookeh exhaust. I see what you're trying to do, from the secondary cat, adapt the Mookeh 3" piping. Do you need a cat for emissions in your state? Link to comment Share on other sites More sharing options...
Cobalt60 Posted August 26, 2010 Author Report Share Posted August 26, 2010 There is no emissions testing where I am (Virginia), so I assume that would mean I dont require a cat to pass inspection, not sure though. I think I would rather run with a cat though, since they are good at what they do, and are relatively unobtrusive. I do take emissions into consideration even though it may not be legally required. I plan on eliminating the pre-cat and deleting the EGR system, so a 3" cat would be the sole emissions control device on the car. Right now my old school 2.25" cat-back is detached from the cat, and from the muffler, theres a whole lot of rusted piping just dangling around back there. So my motivation for getting this cat-back was primarily as a repair with consideration to be compatible with future performance mods. Link to comment Share on other sites More sharing options...
87starion_in_ma Posted August 26, 2010 Report Share Posted August 26, 2010 i believe the factory cat are ceramic. i also live in virginia, they don't do emissions but they are supposed to do a visual inspection of emissions parts. Link to comment Share on other sites More sharing options...
scott87star Posted August 27, 2010 Report Share Posted August 27, 2010 Ceramic, way better suited to the job. Being a chemist I find it odd the distinction is even made as these catalysts are metallic supported by ceramic. I can't fathom platinum and palladium supported by a metallic structure but hey, I am open to new ideas. Scott Link to comment Share on other sites More sharing options...
Cobalt60 Posted August 27, 2010 Author Report Share Posted August 27, 2010 Cool so I was probably going to get the Magnaflow then. Seems like a reputable brand, and its onlt like $75, others are $100 or more. Im doing my cat converter shopping on eBay, so if anyone wants to suggest something other than the Magnaflow, thatd be great. But I already did get one recommendation for it. Magnaflow $73 Yonaka $50 OBX Turbo $200 Why the price difference? And do I really need attachments for anything? Thanks -Chris P Link to comment Share on other sites More sharing options...
Guest Posted August 28, 2010 Report Share Posted August 28, 2010 Just go with the Magnaflow. In Cali we have strict smog laws so what some tuners do is go with an OEM cat. The aftermarket cats don't have 1/4 of the material of an OEM. I've had cars not pass emmissions because the aftermarket cat doesn't have what it takes. But you don't have that problem where you are at. So Magnaflow is a brand name, you can't go wrong. Link to comment Share on other sites More sharing options...
BOOSTED88tsi Posted August 28, 2010 Report Share Posted August 28, 2010 Don't get a magnaflow. Both scotty don't and i have had them break apart and cause a bunch of issues. With under 5k miles on both parts. I wouldn't even run one personally. Link to comment Share on other sites More sharing options...
Cobalt60 Posted August 28, 2010 Author Report Share Posted August 28, 2010 Don't get a magnaflow. Both scotty don't and i have had them break apart and cause a bunch of issues. With under 5k miles on both parts. I wouldn't even run one personally. Do you have a recommendation one one I should get? Link to comment Share on other sites More sharing options...
BIL Posted August 28, 2010 Report Share Posted August 28, 2010 I have to disagree. I've had zero problems with my Magnaflow for the past 2 or 3 years. Link to comment Share on other sites More sharing options...
Scotty Dont Posted August 28, 2010 Report Share Posted August 28, 2010 I blew my magnaflow apart because I used my step with it install which was a BIG mistake, I purchased another 3" maganflow cat and only install it when I go for emissions tests and I can really tell the difference in power it makes not having the cat installed Link to comment Share on other sites More sharing options...
Cobalt60 Posted September 22, 2010 Author Report Share Posted September 22, 2010 Do I need a bung for an O2 sensor? My car is an '87 with an '88 ECU, and I plan on deleting the EGR system soon. Other than that, I dont think any of my mods are related to the exhaust system. Thanks -Chris P Link to comment Share on other sites More sharing options...
Caliber308 Posted September 22, 2010 Report Share Posted September 22, 2010 (edited) So you got a Mookeh exhaust. I see what you're trying to do, from the secondary cat, adapt the Mookeh 3" piping. Do you need a cat for emissions in your state? It's not only a state law to have a catalytic converter....It is a FEDERAL LAW also.Up to a $50,000 dollar fine if your caught without one.Here in Montana we don't have any Smog inspections. But, if I get pulled over and the MHP wants to push it, I can end up in Federal court and be fined $50,000 for not running one. Fair warning to all !!!! CALIBER 308 Edited September 22, 2010 by Caliber308 Link to comment Share on other sites More sharing options...
Cobalt60 Posted September 23, 2010 Author Report Share Posted September 23, 2010 So, I guess I would want at least one bung if I ever want to use a Wide-Band, correct? Do I need a 2nd bung for any reason? Link to comment Share on other sites More sharing options...
Caliber308 Posted September 25, 2010 Report Share Posted September 25, 2010 So, I guess I would want at least one bung if I ever want to use a Wide-Band, correct? Do I need a 2nd bung for any reason? If you want to run a Wideband O-2, Yes, you will need one installed at least 36 inches downstream from the turbo outlet. If you use the one right after the turbo you will eat up your sensor real quick. CALIBER 308 Link to comment Share on other sites More sharing options...
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