So I just bottomed out my speed6 on a ridiculous curb drop thing that I didnt see... My metal catylitic converter (i think) has a hole in it it is labeled #3 on the streetunit diagram and I think I just need a test pipe? What is the difference between a downpipe and a test pipe though? Does anyone have one for sale?! Any info will help! thanks

test pipe will replace that section where cat #3 is. a down pipe would be just before that section...it goes from the exhaust mani to where cat#3 is.

Depending upon the downpipe, it may replace the cat as well. I think the CPE downpipe replaced the cat and the corksport downpipe does not.

I think I am going to get this sls performance test pipe off ebay. Has anyone heard of it?

http://cgi.ebay.com/ebaymotors/MAZDASPEED-6-MS6-MID-RACING-TEST-PIPE-CAT-ELIMINATOR-/130397424286?cmd=ViewItem&pt=Race_Car_Parts&hash=item1e5c4aca9e

go with a UR pipe. you can get catless, catted, ceramic. Theyre the best of the inexpensive pipes...id be weary of anything ebay.

understand too that anything exhaust for the ms3 will NOT work on the ms6.