Bolt on's, when does it get counter productive?
 

I was wondering when bolt on's start to be counter productive. I'm getting ready to pull the trigger on a set of ART's, but I'm wondering if I've already taken the bolt on route to the max. I've just installed the M370, so now it's CAI intake, exhaust, manifold, flywheel and a tune. I'm just looking at my dyno chart before the manifold and it's 320/243 on a Mustang. Now I will say that I can definitely feel the M370 even without it being retuned so I know the mid torque is up. What if anything will I gain by adding the ART's and a retune. So I guess what I'm asking is, is it worth getting the ART's or at this point should I just retune and be done with it.
Thanks for the advice,
Tom

Get the test pipes

Get the Z1 headers and the 350z test pipes/art pipes. Or just wait Z1 to release the 370z version of the momentum headers.

^^ agree! If I were you I would install a new part and do a couple of dyno pulls if hp goes up then you can still add more, now if it goes down.... Take the part off try selling it to me as cheap as possible and save for a TT or SC kit! :-)

Ok, calling Jomer tomorrow for the ART's along with RAD for the install and tune. Hopefully they can get me in this week. Results to follow!

Not to derail but did you do just a lightweight flywheel? If so any issues at all just doing the fly?

Just the flywheel. No issues except for some flywheel chatter, but I was expecting that.