Quote:
Originally Posted by GiZzO
AMS,
Would you recommend 200 or 300 metal cell cats? And why?
deleting the cat completely along with the resonator, do you loose low end torque?
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The different between 200-300 is almost negligible, however 200 cells can sound slightly raspier which is why I always opt for 300-cell metal core cats. make sure they are metal core cats (longer lasting).
There is no point in deleting the resonator honestly. Both the Resonator & muffler are AMG components and are a straight through free flowing design, whereas, the exhaust manifolds & cats are off the shelf standard mercedes components (and much more restrictive).
With performance headers & high flow 2nd cats installed you will really want to have that stock resonator in place because it helps clean up the sound significantly. In addition, from a more ethical/moral stand point, Keeping your secondary cats will help clean up the emissions more so than deleting them all together and its 100% legal to put in high flow cats, its 100% illegal to delete them so from that perspective the choice is quite obvious. Most high flows are at least 49-state legal, some are even 50-state legal.
Here are the cats recommend, they are 300-cell metal core cats. Price is $180 shipped for the pair (x2), simply email the seller & tell them you are from a mercedes forum and would like to purchase two for $180 shipped, they will accept. These exact cats made 10HP/12TQ @ wheels on NA 55 AMG on bone stock exhaust.
http://cgi.ebay.com/ebaymotors/High-...205|240%3A1318
(AMS has no affiliation with the cat seller, just a recommendation that's all).
Hope that helps,
~AMS~