[kblv247]

I have 2003 mazda6 with 110k had some misfires the other day and will be replacing spark plugs. i got on this sight to figure out the proper method for that, but in doing so i ran int the precat motor destruction threads. looks like i need to get rid of the precats. i found a ebay listing for SS headers:
02 03 04 05 06 07 MAZDA 6 3.0L STAINLESS STEEL HEADER - eBay (item 250735023371 end time Dec-06-10 15:50:46 PST)
has any one used these? can you see any obvious issues?

 

[e4w]

consider replacing at least 3 ignition coils too(back 3=hardest to replace) while the intake manifold is off...

don't waste your money on ebay headers! the amount of time it take to remove all that stuff and install headers, you want it done right the 1st time IMO! ebay headers are garbage from what i read around; welds cracking, leaks, etc...

 

[aztrojans12]

+1 completely. Unless you know how to weld and customize an exhaust to get it to fit, don't waste your $$$ on a HUGE headache with ebay headers. Either take the hit and buy some legit headers from a reputable company that you know will fit and last (i.e MSDS, etc.), or don't install them at all. If you don't install headers, you can do what I plan to do, which is gut the pre-cats and install an o2 simulator or anti-fouler. I plan to gut the rear precat still on the car, since it's easily accessible once the y-pipe is disconnected. However, the front precat has limited access through the o2 sensor bung, so I will probably have to pull that manifold off (much easier to remove than the rear precat) and spend some time gutting the precat off the car.