Help locating 3" test pipe for 99 GST

[teamo2t]

I am looking for a 3" test pipe or high flow cat to go with an APEXi N1 catback and Megan Down pipe. I have not purchased the Megan down pipe yet but I like the price! Anyway, the Megan test pipe is 2.25 in and out. I prefer the test pipe because it is cheaper, but i want it to be 3".

I was thinking about getting the Road Race engineering 3" DP and test pipe but it will be almost $100 more. Any suggestions? I know I can get it fabricated but I preper to purchase and bolt on if possible.

FYI- I have the Megan test pipe on a 98 GS and I am passing the emissions test in OH. So far it has been four years this way. The test pipe looks like a resonator so no one asks about it becuase they assume it is a catalytic converter. I did notice higher levels of emmisions on the sniff test, but I am still under the threshold.

 

[snowborder714]

I'm pretty sure the Megan Racing downpipe is a cat eliminator which would mean you wouldn't need a test pipe or high-flow cat (unless you plan to chop off a section and put one in).

I was just looking for this (if the MR dp is a cat eliminator) and found a few threads that say so, but if it isn't feel free to correct me.

 

[teamo2t]

I thought the same but Mike from ETS said that it does not eliminate the cat... Anyone know for sure?

 

[Geezus_Aach]

just about any of the ones you see on ebay (link: http://search.ebay.com/search/search.dll?from=R40&_trksid=m37&satitle=eclipse+downpipe&category0= )
eliminates the cat. no test pipe needed. here is one that is ending soon that i know for sure eliminates the cat...
http://cgi.ebay.com/ebaymotors/Down...002QQitemZ120154400194QQrdZ1QQsspagenameZWDVW

 

[DGajre777]

Megan Racing is like RRE's long downpipe - they eliminate the cat. If you don't need a cat in your state, just get a long downpipe. If you plan to swap between cat and test pipe, you'd be better off with RRE's short downpipe.

 

[teamo2t]

Unfortunately we do have emissions testing in OH... How much harder would it be to change the one pipe versus the entire DP at emissions time? I can't imagine it would matter to much. Either way it is a few bolts and some hangers.

 

[Geezus_Aach]

just save your stock downpipe/cat for emmission time. same amount of bolts.

 

[teamo2t]

Thanks. Sounds good... Does any one know if the megan DP will match with the apex cat back or should i go with the RRE DP. I want to minimize bottle necks in exhaust flow as much as possible.

 

[218dsm]

megan does have a 3" test pipe unless the dont sell it anymore..I bought mine about a year ago.

 

[teamo2t]

I have not found it for the 99... I have seen it for the DSMs up to I believe 95... Something like that.

At this point I am more concerned with whether this setup will work for me or do I go with the RRE...

 

[Geezus_Aach]

Thanks. Sounds good... Does any one know if the megan DP will match with the apex cat back or should i go with the RRE DP. I want to minimize bottle necks in exhaust flow as much as possible.

the megan downpipe i posted above will bolt directly to the cat-back portion of your apex exhaust. it includes new bolts and gaskets. you will need nothing else.. except maybe a can of rust remover for those stubborn rusty exhaust bolts.

 

[DGajre777]

I have RRE, so I'd vote for them. If you switch between a cat and a test pipe it will basically be 4 bolts instead of removing the entire downpipe.
http://www.roadraceengineering.com/parts/dp/rredp-2gfwd-options.jpg

You could also keep your stock downpipe for emissions purposes and swap it if you have annual testings.

 

[DSMunknown]

You could also keep your stock downpipe for emissions purposes and swap it if you have annual testings.

Especially if you encounter the rust demons from hell.