Originally Posted by luk8272
Roxspin72: I am offshore and can't seem to remember seeing two sets of cat on our trucks. Am I understanding correctly there is a set up front that connects to the headers then another set in back? The short headers allow you to just bolt up and the long tube require you to weld them? What would be the advantage of long over short? With the long tube would you need to relocate your o2 sensor? I am working nights so I'll get back on around 6pm if there isn't any work to do out here. Thanks in advance.
JBA short tube Headers need to be welded to your first Cats. then there is a flange from the Cat to the stock Y-pipe which has O2 sensor port and another set Cats... These can be cut, or replace Y-pipe all together without throwing a code. CEL...
DT long tube Headers bolt right up to stock or aftermarket Y-pipe, eliminating the first Cats, and possibly rear Cats if you cut or purchase the URD Y-pipe. CEL will be on unless you install the O2 simulators in the port provided by DT.
Dont own DT's, but heard good things. Like the JBA's, not very loud, stay within emission req. And, will get little more rumble once second cats are gone.
Note: Most cars I've know'n have stock exh. header/catilitic conv/maybe a resonator/muffler.
Why Tacoma is runing 4 cats stumps me. When I puchased my Borla cat back, I was expecting Y-pipe include, which would have been the case if Toyota did not put unneccessary cats there. Madrel bent piping is the benefit for aftermarket exh system, and the worst bends on the Tacoma is at the Y-pipe...
Well I think I said enough.........