Hi Tony, thanks for your helpful explanations. :tup:
I still have some questions.
I notice a distinctive design difference between your 2.5" and 3" TDX.
The 3" seems to use 3" TP in place of the downpipes, with the catalysers (100cell) now moved downstream into the lead pipes. On the 2.5" the cats still sit in the downpipes (factory positions), the lead pipes are thus straight (or resonated).

I wonder why the cats moved into the lead pipes. Is it just more temperature-friendly? And since the 3" uses testpipes only, does the O2 bung extension on the TPs still prevent CEL?

I'd be all up for going 3", not 2.5" if the only difference is better Turbo spool.
Any sound differences considering both non-resonated?

Most importantly I still wonder whether the 100cell cats pass M.O.T. here in the U.K.
Problem is I don't know how modern cars are emission tested (I've had an OBD1 Prelude before) and my Z is still too new for M.O.T :p
Do they actually sniff the emissions on the tailpipe (then the 100cells would surely fail?) or does the ECU merely give a pass/fail in which case one could trick the ECU into satisfaction?

http://www.the370z.com/members/ripti...75143-ouch.jpg

my poor FI exhaust :(

I love it so much, but the beating is brutal.

I'm gonna need new cans or another exhaust system with more clearance.

Wtf is that all about?

Too slammed.

When the lowlife and having the best exhaust for our cars meet.

They are gen 1 cans, they hang super low :/

What are you lowered on? How much of a drop are you running?

That does not help.

You should get skid plates welded on to the cans.

Derek,

I have responded to your pm. What a shame about the muffler. Our (version 2) will raise the front of the mufflers about 3/8" (if installed properly).

I have outlined answers to your questions in my response. When you are ready, pleas give me a call.

Thank you, Tony

Tony, I appreciate the time you took for a great response.

I'm gonna talk to a shop and look into having it fixed with the addition of a skid plate.

I am on BC coils and not super slammed. I fight giant steel road blocks on a military base daily. Yesterday, the angle wasn't perfect and it raped my can.

Ouch :(
U may be lucky the steel hurdles didn't rip of half of your exhaust.
Best of luck with the fixing.

damn sorry man!

Fort Hood has the same above ground barriers that you speak of. If I were any lower, I would have issues with them as well. For future reference, try getting as close as you can to one side and let your outside tires ride over the knuckles that raise the barrier. You should clear that way.

Wait........are they the reverse spike strips or barriers?

Barriers and I already use that tactic hahaha

Which P.O. numbers got their tracking numbers on Friday, January 17th?