Quote:
Originally Posted by ksoze
Not to talk you out of the exhaust, but I have found the stock M Performance exhaust to be perfect. I have both flaps open on all modes (via fuse pull) and it has enough growl to work for me with no drone. Dinan says their exhaust will give very little if any HP gain. The Stage 1 tune however is worth it.
As far as numbers, the only real world numbers other than Dinan's posted ones are from users in their documented 1/4 mile runs. The Stage 1 tune seems to cut 1/2 second off the 1/4 and likely close to 1/2 sec on 0-60. Dinan claims their stock and S1 dyno numbers were done on two machines including a Mustang dyno.
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Can you provide details on the exhaust flap mod? Will it work on a 2016 550?