Hey guys, I just wanted to show of my turbo 1.6 Miata with a custom 2.5 inch dual exit exhaust with Magnaflow #12265 muffler. This is a really quick video I took right after I got it and I will eventually update it with more clips.

 

I think your valvestem seals may be toast judging by the smoke after engine decel.

 

Definitely toast, this only started happening recently thought however. Might be the turbo as well because it's a junk ebay turbo that doesn't hit full boost till 5k